How To Build A Greenhouse Grade 7 Science Fair Projects

A greenhouse is basically a structure that has been designed to capture and retain the heat from the sun. It is used to grow plants when the climate does not want to cooperate. Greenhouses can be used in a number of science fair projects and can be used to test concepts from a variety of fields of sciences including engineering, physics, botany and biology.

Project #1 Capturing Heat Energy

In this project the students will be designing a greenhouse that captures heat energy from multiple sources. They will be capturing heat energy from the sun and geothermal heat energy from the ground. This project will require the student to learn about heat extraction techniques related to solar energy and geothermal energy.

Sample hypotheses that can be tested with this project include:
(1) The thickness of the plastic used for enclosing the greenhouse impacts the amount of heat conservation in the greenhouse;
(2) The opaqueness of the material used for enclosing the greenhouse impacts the amount of heat conservation in the greenhouse;
(3) The depth of the insulation on the floor of the greenhouse impacts the amount of geothermal heat conservation in the greenhouse.

Project #2 Growing Radishes

In this project the student will build a greenhouse so that they can grow radishes and conduct experiments on the radish plants during times of the year that are not normally conducive to gardening. Radish projects can look at a number of things. For example, students can try to cross pollinate radishes with another root vegetable like carrots, they can attempt to grow radishes in sand or they can try to manipulate the size of the radish by exposing the plant to 20 hours of light per day.

Project #3 Engineering Greenhouses

For students that are interested in engineering, greenhouse science fair projects can be developed with an engineering focus. For example, students can try to develop a greenhouse using nothing but materials that are normally thrown out or recycled, such as cans, bottles and plastic containers. Students will not only need to design and build their greenhouse, but they will also need to test the effectiveness their greenhouse has in regards to collecting and conserving heat energy.

Project #4 Studying Solar Energy Applications

The final project option will be an application project. Students will be learning about solar energy and how to use this knowledge to harness the suns energy to heat a greenhouse. For this project students will design and build a greenhouse that maximizes the energy delivered by the sun. A good approach for this project is to see if their design can magnify solar energy within the greenhouse to make it effective in cold weather.

Science & social responsibility in public health

Epidemiologists and environmental health researchers have a joint responsibility to acquire scientific knowledge that matters to public health and to apply the knowledge gained in public health practice. We examine the nature and source of these social responsibilities, discuss a debate in the epidemiological literature on roles and responsibilities, and cite approaches to environmental justice as reflective of them. At one level, responsibility refers to accountability, as in being responsible for actions taken. A deeper meaning of responsibility corresponds to commitment to the pursuit and achievement of a valued end

Public health ethics is on the map. In the past year, bioethicists and public health practitioners have begun to focus their critical attention on this complex and understudied topic. Much remains to be done. Childress et al. (2002), for example, describe their account of public health ethics as a rough conceptual map of a terrain with undefined boundaries.

Our focus will be on the responsibilities of epidemiologists, a choice made for several compelling reasons. Epidemiology sits at the center of the science and practice of environmental health, and more generally, at the center of public health. Although it is often referred to as a basic science of public health, epidemiology connects the acquisition of scientific knowledge with its application in preventive interventions, programs, and policies. This connection suggests a fundamental question: What are our responsibilities as epidemiologists? Do we, for example, have a joint responsibility to participate in science and to apply the knowledge gained? This is a key concern for us as researchers, health professionals, and as teachers.

The social responsibility of public health professionals is but one of many concerns in the broader picture of public health ethics. It is nevertheless a central concern. As Ogletree (1996) reminds us, responsibility is a concept particularly well suited to flame many key aspects of the ethics of professions faced with making decisions and taking actions in complex situations. These decisions often involve advanced technologies, high levels of specialization, and overlapping areas of expertise and concern among decision makers from diverse educational, political, and social backgrounds, precisely the situation in contemporary epidemiology and public health. In sum, responsibility organizes many (although not all) of public health’s ethical issues in terms appropriate for professional practitioners.

Responsibility has a deeper meaning as well, corresponding to commitment. To be responsible means to be committed to someone or to some thing. Being responsible in this deeper sense involves a commitment to positive action, to the pursuit and achievement of something of value, such as a social good (Jonas 1984). We will return to the notion of social goods in public health. For now, we want to emphasize that responsibility focuses attention on professional commitments

Finally, our inquiry is intended to assist all public health researchers who seek to define their social responsibilities. For those who are involved primarily in environmental health research, we can think of at least two connected and current topics–environmental justice and community-based participatory research.

New Pricing Technology Makes Car Insurance Cheaper

Over the years, the technology used to calculate car insurance premiums has changed dramatically. Actuaries used to figure out premium levels by hand using books of statistical data. Later, adding machines and early computers ground through the numbers. More recently, online forms were invented which allowed you to get a quote online.

After all that time grinding things out, what most insurers and consumers wanted was speed. As a result, the current model for most traditional or mainline insurance companies in Australia consists of just a few questions. With these tiny points of data, a quote is generated based on aggregated consumer averages.

The result is a fast quote, but not a very accurate one. Most people dont notice that they are being treated as averages. They simply pay the quoted amount and pay rate increases even if they are accident free. However, you dont have to settle for this outdated and inaccurate system any more.

While most insurers havent gotten there yet, there are a few car insurance companies that have been pioneering a new way of calculating premiums. This new pricing methodology is based around creating highly detailed risk profiles of potential customers. This allows a calculation of premium that can truly separate high-risk from low risk customers.

There are several winning elements to this methodology. However, for consumers like you, the main benefit is often lower prices. If you are a good driver with a limited number of claims, you can really make home some substantial savings by switching to a company using this in-depth modelling framework to calculate rates for insurance cover.

It can feel a bit strange, especially after years of living with the old speed-is-everything system. Thats not to imply that this method isnt fast, mind you. It simply asks several additional questions about parking locations, length of commute to work, and so on.

As one of the early adopters, you stand to benefit the most. While your friends potter along with outdated insurance policies with off-the-rack premiums, you can have a custom tailored premium that only charges for the real risk you face as a driver and customer. Youll be able to quit subsidizing the behaviours of others through blanket premiums, and get to enjoy the fruits of your own careful behaviour on the road.

This is especially true if you really arent an “average” driver. If you only drive a few days a week, work from home and dont use your car regularly, or are retired and dont drive long distances, you have a dramatically different risk profile than most Australians. Yet you have been paying “average” rates for years, since the old method never inquired about your true habits.

Even if youre not a fan of the new and different, this is a new technology youll want to embrace. The new technology behind this quoting system isnt all flash and sparkle. It truly represents a way to make insurance premiums cheaper for you through more accurate pricing of your insurance cover based on your real risk profile.

Websites For Artists The Impact Of Information Technology To The World

Information technology soars high with its never ending commitment – to provide the highest quality technology-based services in the most cost-effective manner. It changed how the world looks like as time passed by. It provides support for audio/visual, computer, multimedia, voice and video and even websites for artists.

Information technology can be found everywhere. From the newspaper we read everyday to the most advanced gadget we use, all of them are products of information technology.

Graphics and Animations

Computer graphics and animations are working hand in hand to bring the most modern effects in cinematography. 3D or the three-dimensional image is an example of how information technology evolves in the world of film making. Walt Disney, Universal Studios, and Pixar Animation are examples of companies that produce films in 3D Formats. Artist and directors made their lives easier in filming movies and putting up websites for artists through the help of information technology. Now, they can film a scene inside a small space without going to a distant place and can create a site that will look so authentic.


Information technology is also making its name in world of photography. Photos are more vivid compared in the past. Thanks to the newly-invented camera lenses that generate images in full HD.


Websites for artists are connected to entertainment as well. Music, an art form whose medium is sound, is the most popular area of entertainment. Just like other fields, the world of entertainment flocks its wings with information technology. 3D surround sound and the most common sound format Dolby Digital are products of information technology. Movies use these sound formats to deliver a more fascinating sound experience like no other.
Music tracks are now developing with the help of information technology. From a phonograph disc which plays mono sounds to a highly digital stereo. Tracks are now recorded in compact disk that delivers good sound quality.


Medicine is the most important field of all. It is where IT developers give their time to create new inventions to help save lives. IT specialists are working double to provide medicine advancements. An example of this is the latest gadget that mimics embryo experience that shows promise for infertility treatment.

The World Wide Web

The World Wide Web is the information superhighway; the trade of all trades. This is where everything can be found; websites for artists most specifically. Billions of information stream endlessly here.

Information technology is found everywhere, committed to provide excellence in many fields.

Science and Health Scientist Addresses Cancer Concerns Related to Atrazine

Elizabeth Whelan, President of the American Council on Science and Health (ACSH) posted a great entry on ACSHs Health Facts and Fears blog on the growing attempts by activist groups to convince the EPA to ban atrazine due to cancer claims and other health concerns.

Atrazine is one of the most widely used herbicides in the world. It helps farmers fight weeds on corn, sugar cane and other crops, leading to dramatic increases in crop yields. Without it, our food supply would be in jeopardy. Activists want the public to believe that atrazine causes cancer and birth defects, but its simply not true. Whelan writes:

“Atrazines health and safety record is stellar. The Safe Drinking Water Act requires monitoring for a multitude of chemicals, including atrazine. Levels of atrazine in U.S. waters are well within the federal lifetime drinking water standard a level containing a 1,000-fold safety buffer. The Environmental Protection Agency in 2006 completed a 12-year review involving 60,000 different studies and concluded that the current use of atrazine poses “no harm” to the general population infants, children and adults. According to this same regulatory agency (which oversees pesticide use) atrazine is “one of the most closely examined pesticides in the marketplace.”

Whelan points out that many activists are not willing to accept this assessment and were able to cast doubts upon the issue with the EPA. As a result, last fall the EPA announced it would initiate a re-re-re-evaluation of atrazine and health. These activists will not be happy until the EPA bans this herbicide, which would then open the door for activists to attack more chemicals, claiming they are unsafe.

Finally, Whelan points to the media for “scaring” the public into thinking that these “chemicals” are unsafe and that the manner in which they are evaluated should be changed:

“Many of the recent media chemical scares, like the two hour “toxic” presentation on CNN, argue that a) there are tens of thousands of “chemicals” out there; and b) the current government policy, assuming these chemicals are safe until contrary evidence was presented, must be reversed so that a chemical is considered hazardous until it is “proven safe.” But how do you prove something to be safe? Its like trying to prove a negative it cant be done. The example of atrazine with decades of safe use, thousands of studies that found no harm to humans and years of getting a green light from EPA (which is not known for understating chemical risks) leaves us with the question: After all these evaluations and years of use, if atrazine doesnt meet the criteria for “safety,” what chemical possibly could?”

Electronics Gadgets For Idiots Four G Technology

For somebody who’s a techie, 4G is something you ought to already be familiar with. However, if you’re not one of those who’s fond of electronic gadgets, you should know that there’s more to 4G than meets the eye.

4G is commonly referred to as beyond 3G, a fourth generation wireless technology equipped with a more comprehensive and secured Internet Protocol. It is well-known to provide users with higher speed and better quality anytime, anywhere. It’s packed with better features compared to its predecessors.

Contrary to what others may suppose, 4G is not limited to mobile phones alone but also in computers. If you’re someone who’s fond of watching videos online, you’ll find that 4G provides high definition videos regardless of your whereabouts. You can surf the World Wide Web faster using any web-enabled devices you have by connecting them to the 4G modem. You can chat with your friends faster, hear their voices clearer and monitor their cams with no pauses and disruptions. You can also share pictures and videos without too much hassle. In case you’re going out, you can still use your mobile to surf the net with 4G mobile technology.

So why is 4G highly regarded than 3G or other types of mobile phone network? We are living in a high-tech world where additional technological innovations are discovered almost everyday. 4G happens to be one of the most advanced and recent mobile phone networks in today’s age. It is the network of choice by many since it is very accessible. It also has a very high data rate amounting to 100 Mbps and a very extensive bandwidth capacity which added networks fail to provide.

There are pitfalls though. The main one is that as a cutting edge technology there is likely to be very few places that actually have a 4G network in position.

Chances are it is used first in highly urbanized areas before it spreads out to rural areas. To remedy this problem, various companies set 4G hotspot areas where users can go to and use it free of charge. In some cases, there are computers which aren’t applicable with 4G since it’s engineered for Windows.

Today, almost all kinds of cell phones are suitable for 4G. Nevertheless, many techies believe that smart phones are the best because of their quality digital cameras. Others use T-mobile and iPhones which are likewise 4G compatible devices. Another concern will be the price. You can have these gadgets with or without 4G contract. A device with a 4G contract is cheaper with price starting at 199 to 299 US Dollars while those without a contract can cost you 599 to 699 US Dollars.

Switching to 4G is a good option you can make especially if you’re someone who’s into the latest technological craze and doesn’t want to be left behind. With so many features it offers, 4G is certain to change the way you look at technology.

Simplifying Cbse Science

Driven by a perception related to better career options after studying CBSE Science in school, most parents and students prefer opting for CBSE Science at the plus two level. There used to be a time when only the very studious and serious students who would like to pursue a career in medicine or engineering opted for CBSE Science. Not any more. Nowadays, more and more students are opting for CBSE Science over the other available options. In such a scenario it becomes even more important for students to understand the CBSE Science syllabus and identify websites that provide quality CBSE Science sample papers, revision notes, science animations and other related study material.

CBSE Science syllabus- Structure

To start with, the syllabus for CBSE Science for all classes has been conceived in a manner that facilitates sequential and progressive conceptual understanding of a student. The entire model of structuring and imparting conceptual knowledge has been well thought out. What, when, where and how form the basis of the delivery model for the CBSE Science curriculum. The systematic and smooth transition of imparting knowledge from a basic level to an expert level can easily be observed in the approach adopted in the NCERT Science books.

For classes 4th to 6th the science books by CBSE encourage students to explore the world around and learn through a hands-on experience. This is followed by encouraging students in higher grades to involve themselves in group discussions and simple experiments that allow them to share and learn information. CBSE Science syllabus further imparts knowledge through advance study modules to students studying in classes till the X. Once they have chosen CBSE Science as their subject/ stream in class 11th, it is taught as a full-fledged discipline. While pursuing it as a discipline, Science as a composite subject is bifurcated into Physics, Chemistry, Biology and Biotechnology.

CBSE Science animations, revision notes, model tests & more

While preparing for your CBSE Science exam, you can choose to seek help from science animations. These science animations are available in 3D and 2D formats that explain complicated and time consuming processes/concepts effortlessly. These science animations stress on conceptual understanding of the topic and are a valuable aid while revising for the final CBSE Science exam.

While revising, students can support these science animations with readymade revision notes and model tests. There are a few e-learning websites that provide such animations, model tests and readymade revision notes. These e-learning websites are dedicated to developing learning content specially aligned to the CBSE curriculum that helps students to prepare better for their CBSE Science exam.

Such comprehensive knowledge of the syllabus structure and online study resources for CBSE Science will surely give you an edge over your peers. So go ahead, use the information provided in the article for an excellent performance in your exams.

All the best!

Why Are Teens So Stressed Science Fair Projects

The topic of your science fair project is critical to its success. If you select a topic that you are not interested in you will find the process of completing a science fair project boring and tedious. However, you can overcome this problem by focusing on something that either interests you or that impacts your life directly. Here is a topic for this year’s science fair project “why are teens so stressed?”

Background Research

“Why are teens so stress?” This is the topic for your science fair project this year. So now that you have a topic your next step is to conduct research on this subject. This research will need to begin with a general search of teen stress. The results from this search will provide you with leads on what is stressing out teens and what research has already been done.

Develop a Hypothesis

Now that you know a little bit about your topic your next step is to develop a hypothesis. Your hypothesis will predict what is stressing out teens. For example, your hypothesis may be that teen stress rates are impacted directly by the stricter entrance requirements for college.

Develop an Experiment

After you have a hypothesis you will need to find a way to test that hypothesis. If your hypothesis is that teens are stressed by the increase in acceptance standards of colleges then you will need to design an experiment that tests how these higher standards are impacting student stress levels. You can do this by collecting data on college entrance requirements from the 70s and comparing them to those of today, and you can also conduct interviews with teens to figure out how stricter college entrance requirements are impacting their stress levels.

Collect Data

Data collection for this type of science fair project will involve collecting data and information from government and nonprofit sources, as well as collecting data directly from your own test subjects. When you are collecting data from your test subjects make sure your test conditions remain constant for each experiment. This will help to ensure your data is reliable and valid.

The Meaning Of Health Science

True we are moving fast towards a highly evolved society with rapid advancement in all fields of technology, communication as well as sciences. There are innumerable new terminologies that have come into existence, for eg: “health science”. Though the term may be newly coined, the science has been in practice for ages.

What does Health science mean to you? It can mean different things to different people depending upon each one’s view point. Health of every individual is a sum of several parts which is not limited to one particular branch alone. We have the physical health or the medical science which looks into the physical ailments. This stream itself has innumerable specialization branches depending upon various disciplines. Besides we have the psychology and psychiatry branch of health science to be considered too.

All of us know the definition of science. It refers to scientific examination or study of principles and laws that are verifiable and can be reproduced and validated to give the same results. As applied to health sciences, we are referring to the systematic pursuit of similar research and query into the issues concerning the health of the human beings.

So you can call the general practice of medicine including nutrition, die tics as well as fitness and overall body metabolism to be covered under Health Sciences which deals with the human body as a whole. Health sciences while being concerned about overall health and metabolism of the body can still focus on a particular function of body part too.

If you look at the health sciences branches there are quite a few of them with most common being die tics, phytotherapy, occupational health, audiology, speech therapy, nutrition, environmental health etc.

Besides medical community of doctors, there are several other health science specialists that are a part of the hospitals and other clinics today. Holistic health centers offer all branches under one roof. Not only the medical centers but even corporates are seen to be including the health sciences as a part of their employee safety and welfare schemes.

If you wish to aim for a successful career, you can even work up to get a PhD in Health sciences. Then you get to choose where you wish to work whether in a hospital or a clinic or a rehab center. You can even join any NGO promoting awareness or join a MNC corporate as a part of CSR.

It takes a while to get a mastery over the subject, but once you are at the top, then you get ample opportunities to research into the problems plaguing people and help find practical solutions to everyday health problems.

Know the top 4 health science jobs or you can try your career by signing for the FBI possibilities.

Computer Science Scholarships

There are many computer science scholarships for students working towards these exciting careers. The following are considered to be the top 10:

1. AFCEA Educational Foundation Scholarship: The AFCEAs $2,000 General John A. Wickham Scholarships are awarded to full-time sophomore, junior or senior students with GPAs of 3.5 or higher who are enrolled full time in aerospace, computer engineering, computer science, electrical engineering, math or physics programs at accredited four-year institutions.

2. $2,000 Alice L. Haltom Educational Fund: These computer science scholarships are awarded in $2,000 increments for students working towards a bachelors degree and $1,000 increments for students working towards an associates degree.

3. ESA Foundation Computer and Video Game Scholarship: The ESA Foundation established these $3,000 scholarships in 2007 for women and minorities attending or planning to attend accredited four-year colleges and universities and working towards degrees that will lead to careers in the computer and video game industries.

4. Intel Science Talent Search: These $100,000 computer science scholarships go to one lucky college student each year. Applicants must submit applications by November 17 for the following year.

5. NFB Computer Science Scholarship: The NVM provides about 30 scholarships each year at its national convention to U.S. blind students who participate in the entire NFB convention and are pursuing or planning to pursue full-time, postsecondary studies (except for one scholarship given to a part-time student working full time).

6. ThinkQuest Internet Challenge: $5,000 computer science scholarships from the Oracle Education Foundation are available to teams of students through this international website-building competition.

7. SWE Scholarship Program: $10,000 scholarships are awarded to female students in accredited bachelors or masters programs preparing for computer science, engineering and engineering technology careers.

8. UC/Edison International Scholarship Program: These $15,000 computer science scholarships are available to community college transfer students planning to finish B.S. degrees in computer science, engineering, life science, math, physical science or technology.

9. Upsilon Pi Epsilon Student Award for Academic Excellence: UPE offers several $500 scholarships to computer science students who excel in their national competition.

10. XEROX Technical Minority Scholarship Program: $10,000 computer science scholarships are available for minority students pursuing technology careers.

Find the perfect Computer School today and start your path to a rewarding career.