Environmental Science

Question 1

•thin layer of gases that hover above our

planet’s surface.

Answer 1

Atmosphere

Question 2

deadly gases such as

Answer 2

Methane and Ammonia

Question 3

is made of three
oxygen atoms bonded together. It blocks out
ultraviolet radiation from the sun)

Answer 3

Ozone

Question 4

The formation of the ozone layer allowed

Answer 4

MICRO-ORGANISMS

Question 5

were some of the early organisms
that used photosynthesis to convert CO2
into Oxygen

Answer 5

Stromatolites

Question 6

•It is the most important layer for living things
because it contains over 80% of all the air in the
atmosphere!

Answer 6

Troposphere

Question 7

•It contains almost all the water vapor in the

atmosphere, and water vapor produces

Answer 7

weather

Question 8

Located just above troposphere

Answer 8

Stratosphere

Question 9

•It is a layer of gas that absorbs the
ultraviolet rays coming from the
sun. It protects us from these rays,
which can cause skin cancer

Answer 9

Ozone layer

Question 10

protects Earth’s surface from being hit by
most meteoroids (chunks of stone and metal from space).

Answer 10

Mesosphere

Question 11

a
large rocky
body in space,
in orbit around
the Sun

Answer 11

Asteroid

Question 12

much smaller
rocks or
particles in orbit
around the Sun.

Answer 12

Meteoroid

Question 13

If a meteoroid
enters the
Earth's atmosphere an
d vaporizes, it
becomes a

Answer 13

Meteor

Question 14

If a small
asteroid or large
meteoroid survives its
fiery passage through
the Earth's atmosphere
and lands on Earth's
surface.

Answer 14

Meteorite

Question 15

•The fourth and last layer

Answer 15

Thermosphere

Question 16

thermosphere is divided in to 2 layers

Answer 16

Ionosphere

Exosphere

Question 17

▪It is useful to earth’s communication system because it
contains a lot of electrically charged particles. These
particles bounce radio waves.

Answer 17

Ionosphere

Question 18

It is the outer layer of the

thermosphere.

Answer 18

Exosphere

Question 19

An increase in Earth’s average surface
temperature caused by an increase in
greenhouse gases.

Answer 19

Global warming

Question 20

▪the trapping of heat by gases in the

atmosphere

Answer 20

Green house effect

Question 21

heat the
atmosphere, the farther from earth
the higher the temperature.

Answer 21

ultraviolet rays