Earth Science chapter 6

Anything that has weight and takes up space

What is number 2

The center of an atom that is made of protons and neutrons

When water is a solid, it is

The parts of a __ can be separated by physical means

The formula NaHCO3 stands for a compound that combines

A lake is an example of matter in a _____ state

___ property is a characteristic that describes how a substance changes to different substance

H2) tells you that it is a compound made of 2 atoms of _____ and 1 of oxygen

What is number 1

Mixtures are unlike compounds because they

How many elements have we discovered and named

How many elements are found in nature

_____ property can be observed without changing the substance

A chemical property of wood is its

Usually heat or electricity is needed to separate elements in a ______

Exhaust is an example of matter in a ____ state

What is number 3

Why do mixtures not have a chemical formula

Matter exists on earth as a _____, liquid, or gas