Sixth Grade Science Name_________________
Unit 5 Post Test Study Guide KEY
1. Why is the ozone layer so important? 7. The transfer of thermal energy by movement of
Because it blocks harmful ultraviolet rays. particles through gases and liquids is convection.
8. The transfer of thermal energy by direct contact
2. Why is it difficult to breathe at high altitudes? is conduction.
Because atmospheric gases become thinner the 9. Label the letters on the diagram as a type of heat
higher you go. transfer, either conduction, convection or
radiation.
3. If you wanted to fly through a cloud, which
atmospheric layer would you fly through? convection conduction
troposphere
4.
radiation
10. Heat transfer always moves from a warmer
substance to a cooler substance.
11. A student is asked to
design a sleeve for a cup
that will insulate thermal
energy and not feel hot to
the touch when the cup is
filled with hot liquid.
Analyze the above chart to identify the
following layers of the atmosphere. List what kind of materials would be
Layer A – 0-10 km: Troposphere. As you go up, the Insulators Conductors
temperature decreases. (block heat) (transfer heat)
Layer B – 10-50 km: Stratosphere. As you go up, Plastics, cardboard, Metals, such as
the temperature increases. silicone, etc. aluminum, copper, etc.
Layer C – 50-80 km: Mesosphere. As you go up,
the temperature decreases. 12. Label the following with arrows, high and low
Layer D – 80-140 km: Thermosphere. As you go pressure, a sun or moon to indicate time of day,
up, the temperature increases. and label the water and land as warm or cool.
Layer E – higher than 140 km: Exosphere. Sea Breeze Land Breeze
5. A pot is heated on a stove. Which heat transfer
process causes the metal handle of the pot to
also become hot?
conduction
6. Bill stands in a swimming pool and notices that
the water around his feet is a lot cooler than the
water near the surface. Which process causes
this difference in temperature?
13. Warm air rises because it is less dense.
convection Cold air sinks because it is more dense.
14. This photograph shows a beach on a partly 22. Label each of the following with the type of
sunny day. Energy from weather front it symbolizes.
the sun causes water to
evaporate from the A. warm front
ocean.
15. Which is the best explanation for how air
masses move across the United States? B. stationary front
The prevailing westerlies move air masses
from west to east across the United States but
may be deflected by the jet stream. C. cold front
16. Which global winds have the greatest impact on
the weather in the US?
prevailing westerlies D. occluded front
17. Differences in air pressure affect the
movement of air because air always moves from
areas of high pressure to areas of low pressure.
18. The curving of air to the right in the Northern 23. Where do hurricanes originate (start at)?
Hemisphere is caused by Earth’s rotation and Warm tropical oceans
is called the Coriolis Effect.
24. A dry, cold air mass would be called
19. Wind is the movement of air from areas of high
continental polar.
pressure to areas of low pressure.
25. The boundary between cold and warm air
20. Use the
picture to help masses is called a/an front.
you match the
climate zone 26. When a warm air mass gently slides on top of a
with the cold air mass, and you have drizzly rain
amount of followed by beautiful sunny weather, what front
sunlight it is it?
receives. Warm front
Polar Zone- -Most sunlight
Temperate Zone- -Least sunlight 27. A/an air mass is a large body of air that has the
Tropical Zone- -Medium sunlight same properties as the Earth's surface over
which it develops and has the same density and
21. The air mass on moisture content.
the left formed over
a polar region and
the air mass on the 28. What type of weather will most likely result
right formed over a from a low-pressure weather system?
tropical region.
Which type of front cloudy conditions
is at the front of air
mass A? cold front
