CBA 2 Review

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Which of the following is the best example of a student using electrical energy?

Joshua is making a trivet. A trivet is placed on a table beneath a hot pot. He knows that he must choose something that will NOT allow heat to pass easily from the hot pot to the table. Which material should Joshua use to make the trivet?

Conductors allow thermal and electrical energy to pass through easily. Insulators prevent the flow of thermal and electrical energy. Which of the following items is a poor conductor and a good insulator?

Which of these would be a good insulator of electricity?

Walkie-talkies and remote-control cars require batteries to work. Which type of energy is used to power these kinds of toys?

A girl turned the light off and went to bed. She remembered she had accidentally left her glass of ice water on the counter. When she got up the next morning, the ice had melted. What form of energy caused the ice to melt?

Students put a small wooden ball on the end of a spring. They dropped the ball and watched it bounce up and down. One student explained that gravity was the only force making the ball move. Which of the following is a weakness of this explanation?

Which of the following items will best allow energy to flow through an electric circuit?