Joe is building a small toy car. He wants to use a balloon to power the toy car. He fills a balloon 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 Joe do to make the toy car move faster?
What is blow up the balloon more?
Aubree is given a sample mixture containing calcium carbonate, glucose, iron filings, and silica sand. Which of the materials could be separated out with a magnet?
What are iron filings?
Ms. Kayser's class is investigating simple machines. They built a ramp to roll tennis balls down, and measured how far they rolled. The tennis balls released at the top of the ramp all traveled about the same distance. If they wanted the balls to roll even further, they could do this.
What is build a ramp that is taller?