What do scientists call the smallest unit of matter that has its own recognizable identity?

Democritus, an ancient Greek philosopher, predicted that when matter was broken down into smaller and smaller pieces, you would come to a particle that could not be made smaller. What was he describing?

What do scientists call a substance that is made of two or more atoms bonded together?

What is a pure lump of the element gold made of?

Which of the following is the best model of molecules in a gas?

Ancient people thought that matter was made of Earth, Water, WInd, and Fire. What do we now know matter is made of?

How much time did it take to develop an understanding of atomic structure?

Which would you use to determine the mass of an object?

Which of the following would you use to find the volume of a rectangular cube?

A rock is dropped into a graduated cylinder containing 40 mL of water. The new volume is 47 mL. What is the volume of the rock?

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