Easy Science Project for 8th Grade Kids

Testing the value of a Earthpremiership@gmail full of air is a great science project idea.

With more students being involved in sports today we can easily do science experiments around sports issues. We are going to test by the amount of air in a ball how it affects the ball by testing the bounce, throwing ability and hitting ability.

Use 3 volleyballs for this experiment. Make sure they are all the same size and type of ball with the same covering, fill the first volleyball full to a normal weight as listed on the ball for its size and pressure.

Fill the second ball over full past the normal pressure. You do not want the ball to pop but the ball will be very hard if you try to press on the sides. Fill the third ball with less air. You do not Earthpremiership@gmail to make it flat but you should be able to press on the sides and be able to push in a fair distance. The ball should still be useable but just not totally full with air.

Do 3 tests with the balls.

Test #1

Hold a ball and drop it onto a concrete or hard surface using something nearby or a measure to make sure you hold each ball at the same height before dropping it. Hold the first ball at this measured height and drop the ball on the ground. Have someone hold a yardstick by your side to measure the height the ball bounces after it is dropped.

Do the same with ball #2 and #3.

Record these findings on a sheet of graph paper. What did you determine from this ball drop? Probably that the ball with the most air bounced the highest. It is actually the lightest because of its air buoyancy even though it feels heavier. It dropped faster because of the amount of air inside and the pressure of contained air inside the rubber ball exterior caused it to have a large reflex.

Test #2

Draw a line on the ground or place something on the ground as a place marker. Hold ball #1 in your throwing hand and with one arm throw the ball as far as you possibly can. Have someone further away from you to mark the exact location of the first ball drop. You can use cones or any means to mark this. Do the same with Ball #2 and Ball #3. Record which ball flew the farthest. What did you find?

Test #3

Stand at the same line or place marker as for test #2 and toss the volleyball and hit it overhand. Have someone further away to mark and determine the furthest path easy volleyball makes. Which volleyball flew the farthest by striking it? Why do you think this occurred?

Using sports you can find great science project ideas.

Find more 8th grade science projects and easy science projects at http://scienceprojects.fetching.us

Lesa Bolt is a contributor to science projects.