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Science 7
Assignment Worksheet
Unit 7
Name:_______________________
7.1
a. Though all rocks are made of ___________________, not all _________________ are
rocks (same word in both positions).
b. Complete the following table. The first is done for you.
Property
Description
2 Examples
Colour
- The visible colour of the mineral.
- 2 minerals may have same colour.
Streak
Lustre
Hardness
Crystal Structure
Cleavage
Magnetism
Reaction with
certain chemicals
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- Gold is yellow
- Jade is green
Science 7
Assignment Worksheet
Unit 7
7.3
a. Provide definitions for each of the following terms:
Term
Definition
Magma
Igneous Rock
Intrusive Igneous
Rock
Lava
Extrusive
Igneous Rock
Sediment
Sedimentary
Rock
Metamorphic
Rock
b. Give two factors that change an igneous or sedimentary rock into a metamorphic
rock.
c. Give two examples of an igneous or sedimentary rock that changes into a
metamorphic.
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Science 7
Assignment Worksheet
Unit 7
d. Use labelled diagram(s) to show how each type of rock is formed.
Igneous Rock
Sedimentary Rock
Metamorphic Rock
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Science 7
Assignment Worksheet
Unit 7
7.4
a. Cast fossil formation – write these steps in the correct order.
The organism is buried in sediment
An organism dies
Water dissolves the organism
Minerals in the organism are replaced by minerals in the water.
The sediment becomes compacted by other layers of sediment.
1.
2.
3.
4.
5.
b. What evidence of changes in the Earth have scientists found in the Burgess Shale?
c. Why are fossils found in sedimentary rock but not in metamorphic rock?
(think about how the three families of rock are formed)
7.5
a. Complete the following table by filling in the non-shaded regions.
Type of
What causes this type of
What is an example of this
Weathering
weathering?
type of weathering?
-
caused by living things
can be mechanical or chemical
weathering
- caused by physical forces, such
as ice, wind, water, and glaciers
Rocks in fast flowing water rub
each other causing rocks to become
smooth.
-
Chemical
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Carbon dioxide gas dissolves in
rainwater to make acid.
Science 7
Assignment Worksheet
Unit 7
7.6
a. The movement of weathered rock from one place to another is called
____________________.
b. Deposition is the laying down of ________________________.
c. Write a sentence about each type of erosion.
Wind
Water
Gravity
Glaciers
7.7
a. Use the diagram of the rock cycle on lesson 7.7 to explain the following. Be sure
to use vocabulary from the legend and the diagram (such as melting and magma).
- how an igneous rock becomes a sedmintary rock
-how an igneous rock breaks down and becomes an igneous rock again
-how a sedimentary rock becomes an igneous rock
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