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WorksheetsWater Systems 1 (Grade 8)
Total questions: 34
Worksheet time: 17mins
Name
Class
Date
1.
What percentage of the earth's surface is water?
a)
45%
b)
67%
c)
71%
d)
92%
2.
Oceans control:
a)
Weather
b)
Earth's Temperature
c)
Both A and B
d)
None of the above
3.
How much of the water on earth is fresh water?
a)
30%
b)
10%
c)
5%
d)
3%
4.
In most cases, how are waves formed?
a)
Current
b)
Wind
c)
Earthquakes
d)
Animals
5.
The highest point of a wave is:
a)
the trough
b)
the basin
c)
the break
d)
the crest
6.
The lowest point of a wave is:
a)
the trough
b)
the basin
c)
the break
d)
the crest
7.
Tsunamis are massive waves caused by:
a)
Earth's rotation
b)
Earthquakes
c)
Hurricanes
d)
All of the above
8.
How often does the tide come in?
a)
Once a day
b)
Twice a day
c)
Four to five times a week
d)
Once a month
9.
Tides are caused by:
a)
Gravity
b)
Currents
c)
Wind
d)
Giant Sea Monsters (Kraken)
10.
When the moon pulls on Earth's gravity, water is:
a)
Pulled toward the moon
b)
Pushed away from the moon
c)
Pulled toward the sun
d)
Pulled toward and pushed away from the moon
11.
Tides that occur during a lunar eclipse are called:
a)
Tsunamis
b)
Neap Tides
c)
Spring Tides
d)
None of the above
12.
Tides that occur when the sun and the moon are at an angle from each other are called:
a)
Tsunamis
b)
Neap Tides
c)
Spring Tides
d)
None of the above
13.
What is the Earth's Nickname?
a)
Steve
b)
Cool Jeans
c)
The Blue Planet
d)
Blue Jeans
14.
A current is:
a)
a large amount of ocean water that moves in a particular and unchanging direction.
b)
A body of water that exists because of an unknown water source.
c)
The reaction of wind and temperature in the air.
d)
A school of endangered fish.
15.
How are lakes and oceans different?
a)
Lakes are land-locked and oceans are not.
b)
Oceans have a higher salinity than lakes.
c)
Lakes are smaller than oceans.
d)
All of the above
16.
For every 1000 litres on average, lake water contains ____________ of salt.
a)
0.2 litres
b)
0.5 litres
c)
35 litres
d)
71 litres
17.
For every 1000 litres on average, ocean water contains ____________ of salt.
a)
0.2 litres
b)
0.5 litres
c)
35 litres
d)
71 litres
18.
Ocean water has a higher amount of salinity:
a)
around the north pole
b)
around the south pole
c)
around the equator
d)
all of the above
19.
Surface Currents are caused by:
a)
Salinity, Temperature, and Tides
b)
Animal Migration and Large Ships
c)
Wind, earth's spin, and the shape of the continents
d)
Earthquakes
20.
Deep Water Currents are caused by:
a)
Salinity, Temperature, and Tides
b)
Animal Migration and Large Ships
c)
Wind, earth's spin, and the shape of the continents
d)
Earthquakes
21.
A deep wide depression in the Earth’s surface that contains water is called:
a)
a valley
b)
an ocean basin
c)
ground water
d)
a great lake
22.
The phenomenon of "sea floor spreading" that leads to the creation of mountains, ridges and basins in the ocean is called:
a)
Continental Drift
b)
Tsunami
c)
Earthquake
d)
Sink Hole
23.
The longest mountain range is:
a)
caused by continental drift
b)
over 40 000 miles long
c)
completely under the ocean
d)
none of the above
24.
Glaciers are:
a)
large sheets of ice that move.
b)
frozen soil/permanent frost
c)
A cave for penguins
d)
A magical land where Santa's elves are from
25.
Water that drains from land to the ocean is(are) called:
a)
ground water
b)
underground rivers
c)
continental drainage
d)
surface current
26.
Mariana's Trench is found in the ___________ ocean.
a)
Atlantic
b)
Pacific
c)
Indian
d)
Arctic
27.
Sonar is used to:
a)
Track changing temperatre
b)
Track deep water currents
c)
Map outlining coastal areas
d)
Map the ocean floor
28.
How much of Earth's life is estimated to be under water?
a)
10 to 25%
b)
50 to 80%
c)
85%
d)
86%
29.
What is a "biotic" component?
a)
a terrestrial ecosystem
b)
a marine ecosystem
c)
A living organism within an ecosystem
d)
a non-living component within an ecosystem
30.
What is an "abiotic" component?
a)
a terrestrial ecosystem
b)
a marine ecosystem
c)
A living organism within an ecosystem
d)
a non-living component within an ecosystem
31.
What is the biggest influence to an animal's migration pattern?
a)
Weather Patterns
b)
Currents
c)
Water Temperature
d)
Food
32.
The Greenhouse Effect - The Earth's atmosphere
a)
Is named after Professor Earl J. Atmos who discovered it in 1875.
b)
Traps heat and warms the planet.
c)
Is made up of gases.
d)
Both b) and c)
33.
Global Warming is caused by:
a)
The Earth moving closer to the sun.
b)
An increasing amount of active volcanoes.
c)
Melting ice caps.
d)
Higher levels of carbon dioxide in Earth's atmosphere trapping heat from the sun..
34.
"Calving" can be described as:
a)
Ice breaking and falling into the water, specifically in the polar ice caps.
b)
Glacier movements creating valleys and sentiment deposits.
c)
The movements of tectonic plates below the ocean.
d)
A cat standing on a dog standing on a calf.
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