Earth's resources 12 grade

___ makes up 78% of the atmosphere by mass and is essential to proteins, DNA and RNA.

___ is the layer of the atmosphere that protects the biosphere from the sun’s radiation.

Organisms such as bacteria and fungi that break down waste and dead organisms are known as ____.

The true risk of constant use of antibiotics in intensive livestock production is

• the animals will not gain weight fast enough

• the chance of a mad cow disease outbreak

• antibiotic-resistant diseases could occur

• the taste of the meat will be unpleasant

• the cost of the meat will be higher

Coal is

• renewable
• nonrenewable

Soil is composed of air, water, mineral matter, and organic matter

• True

• False

Area that exhibits island arcs

• A

• B

• C

• D

• E

Why has food production become more factory based?

• it keeps the workers safer

• it ensures the food is healthier

• it is more efficient

• there is no other way to feed so many people

Which type of resource will help our environment the most?

• renewable
• nonrenewable

Distinct layer within a soil profile.

• Soil

• Horizon

• Weathering

• Erosion