Cell is a basic unit of all living things Life processes

Matter is anything that has mass and takes up space

Mass is a measure of the amount of matter in an object

Indirect evidence is a set of clues that scientist use to make guesses about

things they cannot see or test directly

4. 
   An atom is the basic unit of all matter
   
5. 
   Scientists think the atom has a central part called a nucleus
   
6. 
   The nucleus of an atom contains two kinds of particles, protons and neutrons
   
7. 
   Tiny particles called electrons travel around the nucleus
   
8. 
   An element is matter that is made up of only one kind of atom
   
9. 
   A symbol is a short way to write the name of an element
   
10. 
    Compounds form when atoms of different elements combine
    
11. 
    The simplest particle of many compounds is a molecule
    
12. 
    A formula is a group of symbols and numbers that stands for a compound
    

CHAPTER 6

1. 
   A physical property is one that can be used to indentiy matter
   
2. 
   A physical change is a change in the size, shape, or state of matter
   
3. 
   The temperature at which solid changes to a liquid is called melting point
   
4. 
   The temperature at which a liquid changes to a gas is called boiling point
   
5. 
   A mixture is a material formed by the physical combining of two or more
   

different materials

6. 
   A solution is a mixture that forms when one substance dissolves in another
   
7. 
   The solute is the substance in a solution that dissolves
   
8. 
   The solvent is the substance in a solution that does the dissolving
   
9. 
   A suspension is a mixture in which particles of a substance don’t dissolve
   

in another substance

10. 
    A chemical change is a change in matter in which one or more different
    

kinds of matter form
CHAPTER 7

1. 
   An electric charge that doesn’t move is called static electricity
   
2. 
   The movement of the extra electrons is called an electric discharge
   
3.