As water begins to boil in a kettle the hotter water at the bottom of the kettle closest to the stove begins to rise and the cooler water above sinks and warms. Why does this occur?

Describe the structure of an atom

Dry ice is solid carbon dioxide that is used in the transport of food and medicine. Dry ice becomes a gas at - 78.5°C without becoming a liquid first.

Which of the following would be the least reliable source of information? A science textbook B government internet site C weekly news magazine D reference journal at the library

15. Using 3 - 4 sentences, explain, in your own words, two ways you could cause an electrical current using only a wire and a horseshoe magnet.

Formulate one reason why the discovery of nuclear capabilities has been good for mankind and one reason why that discovery has not been good for mankind.

April swims 50 m north and then turns and swims 20 m back to the south. What is her velocity if it takes her 60 seconds?

All the colors of visible light can combine to form white light. a. True b. False

If the results of a study do not support a hypothesis, it means that the experiment failed.

How does a rubber band obey the law of conservation of energy?

Shane observes that an upward force pushes him up when he sits on a chair. Based on his observation which statement is correct Friction can act at a distance. Normal force can act at a distance. The chair applies a non-contact force called friction.