Sandy is building a small toy car. He wants to use a balloon to power the toy car. He blows up a balloon half way with air and then attaches a straw to the balloon. He tapes the balloon-straw combination to the car and then releases the end of the balloon. The toy moves forward as the air from the balloon comes out the back of the straw. What can Sandy do to make the toy car move faster?
What is blow up the balloon more?
Oceans, lakes, rivers, glaciers, ground water, and polar ice caps are all examples of this.
What is where Earth's fresh water is located?
Action AA batteries last four times as long as Bonus AA batteries. Action AA batteries also cost four times as much as Bonus batteries. Each battery has the same amount of toxic chemicals. What is a good reason to buy Action AA batteries (besides that they last longer?)
What is they generate less waste in the long run?
If you trace every food web back to it's beginning, where does it's energy all start from?
What is the sun.
The sun is a star that appears larger and brighter than other stars because it is _____.
What is closer to Earth than other stars?