An example of a change of state is __________.

The _________ is an example of a physical change.

Which of the following is an example of a chemical change?

Which of these indicates that a chemical change has taken place?

A ____ is an example of a compound machine.

___________ is a moving inclined plane.

All of these are simple machines EXCEPT .

What is one way in which simple machines make work easier?

A solution with a pH of 13 is a ____.

How do Newton’s laws help scientists understand more about the physical world?

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