Question 1

Question

Directions: The diagram below models part of the nitrogen cycle. Use the diagram to answer any questions that follow.

What happens to the nitrogen at W?

a
Its unusable form is converted into a form that is usable by bacteria in the soil.
b
Its usable form is bonded with other molecules in the atmosphere.
c
Its unusable form is directly transferred up the tree roots.
d
Its usable form is inhaled and turned into proteins by the rabbit.
Question 2
How are the movements of energy and chemicals (matter) through living things in ecosystems different?

a
Energy is limited in the biosphere, and chemicals are always available.
b
Energy forms chemical compounds, and chemicals are lost as heat.
c
Energy flows in one direction and chemicals cycle.
d
Chemicals flow in one direction, and energy cycles.

Answer 1

Question 1: What happens to the nitrogen at W?

The correct answer is:
a Its unusable form is converted into a form that is usable by bacteria in the soil.

(Note: Since there is no diagram provided, this answer is based on typical nitrogen cycle processes where atmospheric nitrogen (N2) is converted to forms like ammonia or nitrates that bacteria can use.)

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Question 2: How are the movements of energy and chemicals (matter) through living things in ecosystems different?

The correct answer is:
c Energy flows in one direction and chemicals cycle.

Energy is typically input into an ecosystem (e.g., from the sun) and flows through it, usually lost as heat, while chemicals are recycled through various biological and physical processes.