7th grade science

Question 1

Atmosphere

Answer 1

Earth’s air, which is made up of a thin layer of gases, solids, liquids; forms a protective layer around the planet and is divided into five distinct layers

Question 2

Chlorofluorocarbons

Answer 2

group of chemical compounds used in refrigerators, air-conditioners, production of foam packaging, and aerosol sprays that may enter the atmosphere and destroy ozone

Question 3

Exosphere

Answer 3

top layer of the atmosphere

Question 4

Ionosphere

Answer 4

layer of electrically charged particles in the thermosphere that absorbs a.m. radio waves during the day and reflects them back at night

Question 5

Mesosphere

Answer 5

third layer of the atmosphere that extends from the top of the stratosphere to about 85 km above Earth

Question 6

Ozone layer

Answer 6

layer of the stratosphere with a high concentration of ozone; absorbs most of the sun’s harmful ultraviolet radiation

Question 7

Pressure

Answer 7

the force exerted on a surface

Question 8

Stratosphere

Answer 8

layer of Earth’s atmosphere directly above the troposphere

Question 9

Thermosphere

Answer 9

fourth layer of Earth’s atmosphere, and it’s thickest layer; has high temperatures

Question 10

Troposphere

Answer 10

layer of Earth’s atmosphere that is closest to the ground

Question 11

Ultraviolet radiation

Answer 11

type of energy that comes to Earth from the Sun