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8.10A Convection Currents
Test Description: A review of conduction, convection and radiation, and how convection effects air and ocean currents.
Instructions: Answer all questions to get your test result.
1) What causes earths weather?
A
radiation
B
convection
C
the rotation of the earth
D
conduction
2) Define conduction
A
When heat is transferred through two things touching.
B
When heat moves through water
C
when warm air rises and cold air sinks
D
when heat is transfered through waves like when we get energy from the sun
3) How do we get energy from the sun
A
Radiation
B
Thermal
C
conduction
D
Convection
4) Pressure ALWAYS goes from
A
Air does not travel
B
Low to high
C
High to Low
D
settles in the middle between high and low
5) Why does hot air always rise
A
It is less dense
B
It has less volume
C
Gravity does not effect it
D
It is more dense
6) Where is the hottest part of the earth always?
A
The equator
B
The South Pole
C
The earth is evenly heated
D
The North Pole
7) Describe how water currents move around the earth
A
Hot water from the equator moves up to the poles and cold water from the poles moves down to the equator.
B
Cold air from the poles moves toward the equator and stays there making the countries near the equator sink into the ocean
C
Oceans do not move around the earth
D
Cold air from the poles turns to ice and stays there making the polar caps bigger every year.
8) Why does cold air always sink
A
It is less dense
B
It does not, it rises
C
It has more volume
D
It is more dense
9) Why is the equator hotter than other parts of the world
A
It is not, all of the earth is heated evenly
B
It is not, it is the coldest part
C
It receives more direct sunlight
D
It is the fattest part of the earth
10) Why are the poles the coldest part of the earth
A
They are rotating faster which makes them windy
B
They are not colder, all of the earth is heated evenly
C
They are the thinnest parts of the earth
D
They receive the least sunlgith
*select an answer for all questions
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