Science Experiments

To compare data

An acre contains 43,560 square feet. The conversion says that it would be 10,890 square feet.

Variable is, logically, something that varies, that is to say, is not constant over time.

Controlled variable, in the control field theory, is a variable measure that is, or that needs to be, controlled. Like a voltage that you need to keep under 10Volts because some devices in the setup have an amplitude limitation.

Manipulated variable is usually a measure, a variable that you can measure. For example, if you can measure the voltage in the experimental setup then you can manipulate it, like using it to power a device.

Constant variable, i think this is not very correct, a mathematician's opinion might be needed. For me is a variable, thus something that is variable over time, that under certain conditions becomes constant, thus stops varying according to time.

true, the amygdala is affected so it controls your levels of aggression and fear. so you can make a cat very vicious or horrified of a mouse or even an ant.

A sloped surface is used to help lift a load up.

The independent variable is the factor in an investigation that the scientist is changing.

The dependent variable is the factor which is measured.

All other variables, factors which could affect the experiment, are controlled, or kept the same.

For example, in an experiment to find out how light intensity affects bean plant growth, the independent variable would be the intensity of the light. The dependent variable would be the amount the plants grew. The controlled variables would be things like the temperature, the acidity of the soil, the amount of water given, the amount of CO2 in the air; in short, anything that could affect the results.

Controlled -time, temperature, location, age at start.

The raisins become coated with bubbles of carbon dioxide that leave the carbonated ginger ale. These can cause some raisins to float, or to pop up and down along the bottom of the glass. If the ginger ale goes "flat" then the raisins will sink to the bottom and stay there.

Yes. Think of a glider, and then imagine folding its wings in half.

Taking a thirty minute shower, leaving it on while you brush your teeth, watering your veggitation mid day, or during the winter, etc, misuse.

Don't do dumb things with it.

Even if they say we are running out of our most precious element, we aren't really, because they have machines now that make water out of air, so we'd really be running out of air when it came down to it.

Yes. Physics can be studied anywhere in the Universe including MIT and Berkley, all one needs is two things: an inquiring mind and a love of learning.

depends what fluids, but all industries use some sort of fluids in most proccesses

When you prepare a science experiment you have different variables (or conditions) that you must either control (manage) or measure.

Examples of variables that can be controlled include:
Temperature
Pressure
Concentration
Quantity

They are called variables because they can be varied while you repeat an experiment. I.e. you can measure how much sugar dissolves in a liter of water. By varying the temperature you can test how this affects the amount of sugar that is dissolved.

A short answer is the scientific method is precise, testable and repeatable. This to ensure the results are the same when done by different people.

Yes

Every element has a temperature where it changes or starts to change from a solid or liquid to a gas. Carbon sublimates from the solid form. Condensation works in the reverse manner.

The consumption of fresh water is necessary for human life, and the question of adequate supplies applies especially to long space voyages (where resupply is practically impossible).

Human requirements are about 2 liters per day, for normal condiitons and normal exertion. So 600 liters, unless recycled, would not last one year, much less a thousand.

Recycling by distillation is only part of the problem : substantial water is lost to the air through perspiration, and some is bound in various body tissues. So 100% recovery and re-use would be extraordinarily difficult. And even with a 99% recovery rate, the 600 liters would be down to unusable levels in less than 100 years (losing 20 ml a day would exhaust 598 liters in 82 years). So the concept of long-term manned space travel is still restricted by this issue, among others, barring some exotic scientific solution.

Dr Oliver Headly was from Barbados, who promoted alternative energy.

Propose another hypothesis; the hypothesis is revised and another experiment is conducted.

Volcano. Get some brown modeling clay or even regular clay from a garden, make a pile, put a hole in the top, find an old film canister, or something equally small, and put an Alka-Seltzer tablet in it. When at the science fair, pour in some vinegar and there you go...for added effect, paint some red on the clay, put in some fake trees, and put red food coloring in with the tablet. Good Luck!

A miniature model of a hurricane. Although it is very tough to build, me and my friends built a model and we got an A++.

The diagram was created by Ejnar Hertzsprung and Henry Norris Russell aound 1910.

It is what the scientist measures

There are tons of projects that can be done in a science project using inexpensive ingredients. One project you can do is using dry ice and liquid soap. Another project you can do is get some hydrogen peroxide, liquid soap and active yeast.

Hydrogen peroxide, liquid soap and active yeast. The chemisty is to decompose hydrogen peroxide with the help of active yeast that is mixed in some warm water. When hydrogen peroxide is decompose, oxygen released is trapped in form of bubbles by the liquid soap. Hydrogen peroxides is available in any pharmacy store and it is just a fun project.