Question

use the information to answer the next three questions.

1. what relationships are demonstrated by the diagram?

a. combustion decreases o₂, respiration increases co₂.
b. combustion increases o₂, photosynthesis increases co₂.
c. decomposition increases o₂, respiration decreases co₂.
d. photosynthesis decreases o₂, decomposition decreases co₂.

1. an abiotic factor in the diagram above would be

a. bacteria
b. rabbit
c. fire
d. plants

1. a rapid algae bloom can harm an ecosystem because

a. algae depletes the oxygen in the water
b. decomposing dead matter depletes the oxygen in the water
c. an extensive algal bloom blocks the sunlight for other organisms in the water
d. all of the above are true

1. the process of converting nitrogen gas into ammonium and then nitrates is

a. denitrification
b. nitrification
c. nitrogen fixation
d. decomposition

1. conversion of nitrites or nitrates into atmospheric nitrogen is called

a. nitrification
b. denitrification
c. ammonification
d. nitrogen fixation

Explanation:

10.

Combustion uses \(O_2\) (so decreases \(O_2\) levels) and releases \(CO_2\). Respiration is a process where organisms take in \(O_2\) and release \(CO_2\) (increases \(CO_2\)). Photosynthesis takes in \(CO_2\) and releases \(O_2\). Decomposition by bacteria can release \(CO_2\) (if aerobic) or other forms of carbon - containing compounds.

Abiotic factors are non - living components of an ecosystem. Bacteria (A), Rabbit (B), and Plants (D) are living (biotic). Fire (C) is a non - living (abiotic) factor.

Algae during a bloom can respire (deplete \(O_2\) if they die and decompose - decomposing dead matter (B) is part of the process as bacteria decompose the algae and use \(O_2\)). Algae can also block sunlight (C) for other photosynthetic organisms. And since A, B, and C are correct, D is the answer.

Answer:

A. Combustion decreases \(O_2\), respiration increases \(CO_2\).

11.