Q: Answer the question

Discarded electronic devices, such as outdated computers and cell phones, contain materials that can be toxic to the environment. Which statement best explains why humans continue to use these technologies?

A: Humans value the benefits of these devices over their cost.

Q: Answer the question

Many people like to use microwave ovens rather than traditional ovens. The main reason for this is that microwave ovens

A: take less time to cook food than regular ovens do.

Q: Answer the question

Which of the following is an example of matter changing state?

A:
heating a pan of water until the water is all gone