Unit 5: Earth Systems
Unit 5 quiz for CCSET Grade 7/8 class. April 30, 2009
- 1.The Earth's crust is made up of
- A.
Oceans and basins
- B.
Continents
- C.
Layers deep beneath the surface of the Earth
- D.
All of the above
- 2.Volcanoes are made by
- A.
The Earth's plates shifting to produce cracks
- B.
Hot lava in the Earth's crust leaking out
- C.
Nothing, they are just naturally here
- D.
Pressure squeezing lava
- 3.The rock plates that float across the surface of the Earth
- A.
Are called tectonic plates
- B.
Float on the mantle between the core and the crust
- C.
Hold up the huge land masses called continents
- D.
All of the above
- 4.The Earth's layers from the inside out are
- A.
Mantle, inner core, outer core, crust
- B.
Inner core, outer core, mantle, crust
- C.
Crust, mantle, inner core, outer core
- D.
Core, mantle, crust
- 5.Minerals
- A.
Are molten magma
- B.
Are hard to find
- C.
Have one chemical composition all the way through
- D.
Are usually organic solids
- 6.Metamorphic rocks
- A.
Are hard to break
- B.
Are very rough
- C.
Have visible lines or waves
- D.
Are formed from cooled magma
- 7.The parent material of soil
- A.
Comes from broken off bedrock
- B.
Has lots of life in it
- C.
Is organic
- D.
Is humus
- 8.Soil erosion is increased if
- A.
There are no plants or leftover crops in the soil
- B.
The slope of the field is steep
- C.
A and b are both correct
- D.
The soil isn't compacted by machinery
- 9.The thickest layer is the
- A.
Inner Core
- B.
Outer Core
- C.
Crust
- D.
Mantle
- E.
Bedrock
- 10.Most of the Earth's total volume is made up of
- A.
The crust
- B.
Rocks and minerals
- C.
The Mantle
- D.
The inner core
- 11.Healthy soil includes
- A.
Stones
- B.
No or very little air
- C.
Loam
- D.
Fresh or decomposed living things
- 12.Most of the internal heat of the Earth is located in the
- A.
Sun
- B.
Inner Core
- C.
Mantle
- D.
Outer Core
- E.
Crust
- 13.Sedimentary rocks
- A.
Have small rocks or sand in them
- B.
Are rough
- C.
Are easily broken
- D.
All of the above
- 14.Rocks are like water because
- A.
They both need to be created new once or twice a decade
- B.
They both wear out
- C.
They are both constantly "recycled"
- D.
They both come from the core of the Earch
- 15.How was the Canadian Shield formed?
- A.
By decomposition of forests
- B.
By glaciers
- C.
By soil erosion
- D.
By earthquakes
- 16.Soil erosion
- A.
Is a natural occurring process on all land
- B.
Is caused by wind and water
- C.
Is a quick noticeable process
- D.
A and b are correct
- 17.Igneous rocks are
- A.
Very smooth with visible speckles
- B.
Rough with sand particles
- C.
Very hard to break
- D.
Both a and c are correct
- 18.The reason that the Earth's crust fractures in earthquakes is that
- A.
Relative to the other layers the crust is cold so it is more brittle
- B.
The Earth's crust can't withstand much shaking
- C.
The crust is only a few centimeters thick
- D.
It moves more than the other layers
- 19.When hot magma is pushed up towards the Earth's crust through a volcanoe, which type of rock is formed?
- A.
Sedimentary rock
- B.
Igneous rock
- C.
Mineral rock
- D.
Metamorphic rock
- 20.Soil erosion increases the amount of dust in the air which is a problem because
- A.
Dust requires lots of repainting of barns and houses
- B.
Dust is a cause of soil pollution
- C.
Dust carries the organisms of infectious diseases
- D.
All of the above
- 21.How thick is the Earth's crust?
- A.
1-5km.
- B.
5-40km
- C.
5-45km
- D.
About 15 km
- 22.We should all be concerned with soil erosion because
- A.
Each year the economy loses money when the land is lost
- B.
Each year the eroding soil carries pesticides and fertilizers into streams and lakes
- C.
We have to cut down more trees to replace the lost soil
- D.
Both a and b are correct
- 23.Why is soil important for life on Earth?
- A.
It is used as a water reservoir
- B.
Soil grows crops
- C.
Soil is used as a filter for pollutants
- D.
Both A and C are correct
- E.
All of the above are correct
- 24.Soil erosion is caused by
- A.
Land
- B.
Water
- C.
Fire
- D.
Wind
- E.
Both B and D are correct
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