Grade 8 Geography

What is the process by which nitrogen is converted into different chemical forms in the environment?

• nitrogen fixation

• nitrogen alteration

• nitrogen conversion

• nitrogen transformation

Which cycle describes the continuous movement of water on, above, and below the surface of the Earth?

• Earth's water cycle

• Water cycle

• Hydrological cycle

• Water movement cycle

What is the main greenhouse gas responsible for global warming?

• carbon dioxide

• oxygen

• methane

• nitrogen

What is the arrangement of particles in a soil called?

• soil composition

• soil structure

• soil texture

• soil formation

What are the fluffy, white masses of condensed water vapor that we see in the sky called?

• fog

• mist

• clouds

• smoke

What is the name of the process by which nitrogen gas in the atmosphere is converted into a usable form by bacteria?

• nitrogen fixation

• nitrogen alteration

• nitrogen transformation

• nitrogen conversion

Which cycle involves the movement of carbon between living organisms, the atmosphere, and the Earth's crust?

• carbon cycle

• water cycle

• nitrogen cycle

• oxygen cycle

What is the term for the layers of different materials that make up a soil profile?

• stratums

• horizons

• substrates

• strata

What are the high-altitude, wispy clouds made of ice crystals called?

• stratus clouds

• cumulus clouds

• nimbus clouds

• cirrus clouds

What is the name of the process by which water vapor changes into liquid water?

• precipitation

• sublimation

• evaporation

• condensation