Question

what is the primary function of the atmosphere in relation to life on earth?
a. it supports life through nutrient cycling.
b. it shapes coastlines through sedimentation.
c. it stores groundwater.
d. it absorbs harmful solar radiation.
which process allows plant roots to break apart rocks?
a. volcanism
b. biological weathering
c. sedimentation and erosion
d. convection

Explanation:

For the first question:

• Option a: Nutrient cycling is mainly related to biogeochemical cycles in ecosystems, not the primary atmospheric function.
• Option b: Sedimentation shaping coastlines is a geological process involving water and sediments, not the atmosphere's main role.
• Option c: Groundwater storage is part of the hydrosphere, not the atmosphere.
• Option d: The atmosphere (especially the ozone layer) absorbs harmful solar radiation (like UV rays), protecting life on Earth.

For the second question:

• Option a: Volcanism is related to magma and volcanic activity, not plant roots.
• Option b: Biological weathering is when living organisms (like plant roots growing into rocks and breaking them) cause weathering.
• Option c: Sedimentation and erosion are about movement and deposition of sediments, not plant - root action.
• Option d: Convection is a heat - transfer process (e.g., in fluids), not related to plant roots breaking rocks.

Answer:

For the first question: d. It absorbs harmful solar radiation.
For the second question: b. Biological weathering.