The current state of the atmosphere is known as

• climate

• weather

• air masses.

• precipitation.

_________is the pattern of weather in an area over many (30+) years.

• weather

• sun

• climate

• temperature

Throughout Earth's history, climate has not changed.

• True

• False

Select all that apply.

Which of the following can be natural causes of climate change?

• changes in the amount of energy released by the sun

• changes in the path of Earth's orbit around the sun

• changes in the tilt of Earth's axis

• volcanic eruptions

• All of the above.

The greenhouse effect refers to _______.

• the warming of Earth due to human activities

• a natural process that keeps Earth's atmosphere warm

• environmental change

• a particularly strong ocean current that effects Earth's weather

Which of the following is considered a greenhouse gas?

• Sodium Chloride

• Methane and Carbon Dioxide

• Oxygen

• Nitrogen

The main greenhouse gas produced by human use of fossil fuels is _______.

• sulfate aerosols

• nitrous oxide, N₂O

• sulfur dioxide, SO₂

• carbon dioxide, CO₂

The powerful greenhouse gas produced by livestock as a metabolic waste product and fossil fuel extraction is

• nitrogen oxides

• methane, CH₄

• propane, C₃H₈

• halocarbon and fluorocarbon gases

Increasing greenhouse gases in the atmosphere contributes significantly to

• ozone depletion

• tectonic plate shifting

• global temperate decrease

• global temperature increase

Within the carbon cycle, anything that absorbs more carbon from the atmosphere than it releases is called a

• carbon sink

• carbon source