Science Experiments

A bibliography is a list of all the sources you got you information from.

138 pounds!

Light (in a vacuum) travels at approximately 3 x 108 m/s.

Sound in air at standard temperature and pressure travels at approximately 300 m/s.

Thus, light is about a million times faster than sound.

Look at the rubric. It will most likely tell you

You will see 7 images.

Yes, the part of the experiment that is changing is the variable, or the dependent variable. The independent variable, or the control, is the part that stays the same.

Oil is a fossil fuel derived from decaying organic matter, while solar energy comes from the sun's radiation. Oil is nonrenewable and emits greenhouse gases when burned, contributing to climate change, while solar energy is renewable, sustainable, and emits no greenhouse gases during operation. Solar energy is harnessed using solar panels, while oil is extracted through drilling and refining processes.

A Independnet vaviables is samethink that you can change it but change it back

so why whould you change its when it is the same

I don't know what experiment you're talking about but I'm doing science right now and they asked the same question about a lab experiment I did so I'll give you my answers for that.

a. There were droplets of water on the top of the plastic bag.

b. It seemed sort of foggy inside the plastic bag.

c. It's really cool that we can see transpiration for ourselves.

d. I think the air was trapped and so it got humid in there which is why the bag fogged up.

Amy can assume that increasing the number of trusses increases the strength of the bridge.

The experimental procedure.

A nuclear explosion requires two things. First, it requires a critical mass, and second, it requires that the critical mass hold together long enough into the chain reaction that it truly explodes and does not simply come apart.

The critical mass comes because certain isotopes spontaneously undergo fission, and, when doing so, produce enough neutrons to cause multiple other atoms to undergo fission also. If there is enough such material in a small enough volume, a chain reaction is produced that consumes most or all of the atoms present. The only natural element to do this is uranium-235.

A problem with this is that when the chain reaction starts, there is enough heat to cause the mass to fly apart, destroying the critical mass and ending the reaction. So, building a nuclear bomb requires addressing this problem. It is not an easy problem to overcome, and it probably cannot happen accidentally at all. There has been at least one attempt at building a nuclear bomb that probably failed because of this problem.

migration and hibernation

tom ford

rachet paper towel brand is the strongest but you can always find trashy dirty stupid fake girls that are like paper towels easy to rip up in stores near by or YOUR SCHOOL

Two repeats is enough to draw some simple statistics, but they are hardly reliable.

Most experiments aim for three as an absolute minimum; the best experiments will run through hundreds of repeats or 'trials', so that a decent sample can be created.

They don't pollute, its renewable, you can get alot of it, especially Niagara falls, clean energy

In science, independent variables are variables that you control the change of, to see how somethings changes as a result of changing these variables. Dependent variables are variables that change because the independent variables are changed, but you don't change directly.

A good example of this would be an experiment where you're measing how cold a glass of water gets after putting in different amounts of ice in it and wating 5 minutes. The independant variable would be the amount of ice you put into each glass, because that's what you're directly changing. The dependent variable is how cold each glass gets, because that's the result you're trying to see by changing the independent variable - it changes because something else changes.

Additionally, when graphing, independent variables are put on the x-axis (horizontal line), and dependent variables are put on the y-axis (vertical line).

Not yet as the book just came out in 2008 and Dave Berry already has the very successful series "The Star Catchers" to work on.

There are 3 independent variables:

1) The condition the children were exposed to.

2) The gender of the model, and

3) The gender of the child.

The dependent variable is the imitation/behaviour of the children after the exposure.

A factor in a scientific experiment that is subject to change is called a variable.

For a fourth grader, you can do a standard baking soda/ vinegar volcano or something like using alcohol to show the colors a black marker is made up of. You could also look on line to try to make a battery out of a fruit or make a small circuit

Graphs, Tables, or Charts that represent what you tested

That wold depend entirely on what the project is about. There is no point having an awesomely constructed phrase if it has no relevance to your hypothesis.

You ask your friends/relatives/neighbors what they did, and that should either give you an idea, or spark your imagination for your own unique idea. :) You could always go to chacha.com and search "Fun Science Projects" or whatever type of science project you want to do (: