6th Grade Chapter 15 Test Review

Earth Science Chapter 15 Test Review Answer Key

1. What is the atmosphere? THE ENVELOPE OF GASES THAT SURROUNDS THE EARTH
2.  What are the two most abundant gases in the atmosphere? NITROGEN & OXYGEN
3. What percent of our atmosphere is made up of gases other than nitrogen and oxygen? 1%
4. What is water vapor? WATER IN THE FORM OF A GAS
5. Why is Earth’s atmosphere important to living things? PROVIDES ALL THE GASES LIVING THINGS NEED
6. Why does air have pressure? BECAUSE IT HAS MASS
7. What is the formula for density? DENSITY EQUALS MASS DIVIDED BY VOLUME
8. True or false: The less mass in a given volume of air, the less dense the air. TRUE
9. What are barometers? INSTRUMENTS USED TO MEASURE AIR PRESSURE
10.  What is an aneroid barometer? A BAROMETER THAT DOES NOT CONTAIN A LIQUID
11.  As you rise upward in the atmosphere, what happens to air pressure? IT DECREASES
12.  When climbing a high mountain, why do you get out of breath easily? THERE IS LESS OXYGEN IN EACH CUBIC METER OF AIR
13.  How are layers of the atmosphere classified? ACCORDING TO CHANGES IN TEMPERATURE
14.  From Earth to space, what are the main layers of our atmosphere? TROPOSPHERE, STRATOSPHERE, MESOSPHERE, & THERMOSPHERE
15.  What is the lowest and shallowest layer of our atmosphere? TROPOSPHERE
16.  In which layer of the atmosphere does our weather occur? TROPOSPHERE
17.  Where is the ozone layer found? STRATOSPHERE
18.  What layer of the atmosphere is between the stratosphere and the thermosphere? MESOSPHERE
19.  Which layer of the Earth’s atmosphere protects the Earth from being hit by most meteoroids? MESOSPHERE
20.  What is the first layer an astronaut passes through during reentry from space? EXOSPHERE
21.  What is weather? THE CONDITION OF EARTH’S ATMOSPHERE AT A PARTICULAR TIME & PLACE
22.  What gas is most abundant in our atmosphere? NITROGEN
23.  What is ozone? A FORM OF OXYGEN THAT HAS THREE OXYGEN ATOMS IN EACH MOLECULE INSTEAD OF THE USUAL TWO
24.  What atmospheric gas forms clouds when it condenses? WATER VAPOR
25.  What is water vapor? WATER IN THE FORM OF A GAS
26.  What is air pressure? THE RESULT OF A COLUMN OF AIR PUSHING DOWN ON AN AREA
27.  What is density? THE AMOUNT OF MASS IN A GIVEN VOLUME OF AIR
28.  How does an aneroid barometer measure air pressure? BY USING A METAL CHAMBER THAT IS SENSITIVE TO CHANGES IN PRESSURE
29.  What is altitude? ELEVATION, OR THE DISTANCE ABOVE SEA LEVEL
30.  How do scientists classify the layers of the Earth’s atmosphere? ACCORDING TO CHANGES IN EARTH’S TEMPERATURE
31.  Be able to name and answer questions about the SIX layers of the Earth’s atmosphere. TROPOSPHERE, STRATOSPHERE, MESOSPHERE, THERMOSPHERE-----BROKEN INTO THE IONOSPHERE AND THE EXOSPHERE
32.  Be able to read a chart similar to figure 1 on page 513 and use it to answer questions.
33.  Be able to read a diagram of the layers of the atmosphere similar to the one on page 539.  Use information given on the diagram and your knowledge of the layers to answer questions about the atmosphere.