Lesson Worksheet Multiple Choice
Circle the letter of the correct choice.

1 Which of the following is the basic unit of matter?
molecule
chemical compound
atom
nucleus

2 Water is an example of a(n)
atom
molecule
ion
native element

3 An atom is only an ion if it has more or less
neutrons than electrons
protons than neutrons
neutrons than protons
electrons than protons

4 An example of a pure element is
table salt
silicon dioxide
sulfur
calcium carbonate

5 The crystal shape of a mineral
shows how the atoms are arranged
will always be the same if it is made from the same atoms
can usually only be seen under a microscope
can help account for how hard or brittle a mineral is

True or False
Write true if the statement is true or false if the statement is false.
6. A molecule is the smallest unit of an element.
7. Protons and electrons are found in the nucleus of an atom.
8. Halides (salts) make up the largest group of minerals on Earth.
9. Coal and diamonds are different minerals because they have a different structures.
10. In a crystal, the atoms are arranged in a pattern.
Fill in the Blanks
Fill in the blank with the term that best completes the sentence.
11. 90% of Earth’s crust is made of minerals in the group called a(n) .
12. The makeup of a material is the different atoms and molecules that it is composed of.
13. Even though calcium carbonate is made by marine animals, it is still .
14. is the substance of which physical objects are made.
15. Electrically neutral particles are called .
Short Answer