5 Written Questions

1. The word electrolysis means "__".
2. Pyrite is often called "__".
3. Dalton believed that masses of the elements in a compound are always in a ___
4. A(n) __ is a rock that contains a metal or other useful material
5. The force that holds two atoms together is a __

5 Matching Questions

1. dredges
2. different
3. models
4. inferences based on observations
5. atom

1. a Today, gold mining is done using machines called __.
2. b An __ is the smallest particle of an element.
3. c one of the first atomic __
4. d Dalton believed that atoms of different elements are __
5. e Scientists studying atoms must make __ (educated guesses) about them based on ___

5 Multiple Choice Questions

1. One of the steps used to obtain copper from its ore is __.
   1. molecules
   2. electrolysis
   3. exactly alike
   4. Electrodes
2. Dalton believed that atoms of two or more elements combine to form __
   1. models
   2. compounds
   3. copper
   4. molecules
3. Dalton believed that atoms __.
   1. couldn't be broken into smaller pieces
   2. inferences based on observations
   3. fool's gold
   4. iron and sulfur
4. __ are two metal strips used in electrolysis.
   1. electrolysis
   2. greater
   3. Electrodes
   4. molecules
5. Dalton believed dthat atoms of each element have a unique __
   1. atom
   2. two
   3. models
   4. mass

5 True/False Questions

1. copper → A(n) __ is a rock that contains a metal or other useful material

   True        False

2. two → Molecules can contain as many as billions of atoms, or a s few as __ atoms

   True        False

3. exactly alike → Dalton believed that in any element, all the atoms are ___

   True        False

4. density → Gold can be separated from a mixture of dirt and sand because of its ___.

   True        False

5. blast furnace → In 1802, ___ proposed the atomic theory.

   True        False