Two or more atoms bonded together. Atoms could be the same type or different types.

Two or more elements chemically combined

Substance of only one type of atom

Ratio of mass to volume of a substance.

NaCl is...

How is density calculated?

When most substances are heated, what happens to density?

Solid water floats on liquid water. What does this mean for the density?

What is the MAIN reason there are gaps in bridges?

The temperature at which a substance is changing from a solid to a liquid (thermal energy is added).

The temperature at which a substance is changing from a liquid to a solid (thermal energy is taken away).

Which of the following is correct?

A million carbon atoms bonded together would be considered...

DNA is a molecule made of H, C, O, N, and P bonded together. This makes it...

When water boils, bubbles form under the surface of the water and rise to the surface. What is in the bubbles?

Breaking a piece of wood in half changes the density in what way?

Billy spilled water on the floor and was a jerk and didn't clean it up. Molly comes by later and the floor is dry. What happened to the water?

Compare the motion of atoms in a solid to a gas of the same substance.

A substance with a mass of 26 g has a volume of 42 mL. What is its density?

Which of the following could be used to identify a substance?

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