Elementary Science Unit Test- UNIT -10- MINERALS
Name: _____________________
Section: __________
I. Multiple Choice. Circle the correct answer. ( 0.2x 10 = 2 points )
1. What do call the minerals with silicon and oxygen in their composition?
A. Silicates
B. Non-silicates
C. Mineraloids
2. A substance which is made up of only one kind of atom.
A. chemical compound
B. chemical element
C. atom
3. Who devised the Mohs Scale of Hardness?
A. Frederick Taylor
B. Frederick Griffith
C. Frederick Moh
4. What number on the Mohs Scale of Hardness? A mineral that can be scratched with a fingernail.
A. 1 and 2
B. 3 and 4
C. 5 and 6
5. All of the following are physical properties of mineral except
A. Cleavage and Hardness
B. Streak and Lustre
C. Inorganic and Naturally Ocurring
6. What is the most abundant element of the Earth’s crust?
A. Silicon
B. Oxygen
C. Aluminium
7. These are small amount of other substances which are not part of the mineral.
A. Impurities
B. chemical composition
C. atom
8. Which group of minerals do diamonds belong?
A. Non-silicates
B. silicates
C. native elements
9. What do you call the color of the powder left when a mineral scratches a surface?
A. Lustre
B. Cleavage
C. Streak
10. All of the following are common silicate except
A. Quarts
B. Copper
C. Olivine
II. Match the following. Write the letter only on the space provided. ( 0.2x 10 = 2 points )
____________ 1. carbon + oxygen + metal
a. fluorite
____________ 2. metal + chloride / fluoride
b. sulphides
____________ 3. oxygen + another element
c. oxides
____________ 4. sulphur + metal
d. halides
____________ 5. toothpaste
e. carbonates
____________ 6. Cement
f. calcite
____________ 7. table salt
g. halite
____________ 8. plaster
h. talc
____________ 9. white mica
i. muscovite
____________ 10. black mica
j. biotite
III. TRUE or FALSE. Write T for True Sentences and F for False Sentences. ( 0.4x 5 = 2 points )
___ 1. Water and mercury are considered mineraloids.
___ 2. The chemical composition of a mineral is always the same.
___ 3. The Mohs Scale is used to classify the minerals.
___ 4. Diamond is the hardest mineral.
___ 5. Native elements are minerals made up of a single element.
IV. Crossword Puzzle. Use the clues to solve the puzzle and discover the mystery word. ( 0.4x 10 = 4 points )
3.
4.
5.
2.
1.
2.
3.
4.
5.
7.
6.
1.
10.
6.
7.
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9.
8.
9
10.
This silicate is used in electronic insulators.
As its name indicates, this silicate is olive green.
This metal mineral is abundant in the Earth’s core.
This non-silicate is the source of lead ore.
This silicate comes in many colours and is used in
jewellery.
This non-silicate is a halide.
This native element is a precious metal used in
jewellery.
It refers to the way minerals reflect light.
It measures how a mineral reacts to being
scratched.
The color of the powder left on unglazed porcelain
plate.
Mystery word: _______________________________________