___ the stuff that things are made of

___ the amount of matter in an object; the mass of an object is its weight

___ the amount of space that is occupied (take up)

___ matter that is made of only one kind of atom or molecule

___ what you can observe or measure about something that helps you figure out what it is

___ a process in which substances cange into different substances

___ putting together ideas from different sources in order to come to a new understanding

___ when a gas turns into a liquid

___ when a liquid turns into a gas

___ water in the form of an invisible gas

___ a group of atoms joined together in a particular way

___ a person who uses science knowledge to design something in order to solve a problem

When substances are mixed, the properties of the mixture can be ___ from the properties of the substances we started with.

What are some signs that a chemical reaction took place? (choose 3)

In a chemical reaction, substances are mixed, and the new substance has the SAME properties.

Is ice melting a chemical reaction?

What is mixing paint together, and creating a new color?

Atoms and molecules are matter.

In a chemical reaction, matter IS created and destroyed

If the chemical reaction occurs, will the weight of the two different substances stay the same?

When a substance ___ with another substance, it is considered a chemical reaction.