4 Written Questions

1. is a process by which an electric current breaks chemical bonds.
2. of an object is the measurement of how much matter it contains.
3. is the amount of space that matter occupies.
4. is any rock that contains a metal or other economically useful material.

4 Multiple Choice Questions

1. are the units that scientists use to measure matter.
   1. Internal Systems of Units
   2. Electrolysis
   3. Chemical bond
   4. John Dalton
2. is a measure of the force of gravity on you.
   1. Mass
   2. Atoms
   3. Density
   4. Weight
3. thought that atoms were like tiny marbles, or rigid spheres that are impossible to break.
   1. Molecule
   2. John Dalton
   3. Density
   4. Chemical bond
4. is a group of atoms that are joined together and act as a single unit.
   1. Electrodes
   2. Weight
   3. Volume
   4. Molecule

4 True/False Question

1. Chemical bond → is the force that holds two atoms together.
   

   True        False

2. Density → relates the mass and volume of an object or material. To calculate density of a sample, divide its mass by its volume.
   

   True        False

3. Electrodes → are a metal strip that conducts electricity; often used in the electrolysis process.
   

   True        False

4. Atoms → of an object is the measurement of how much matter it contains.
   

   True        False