Question

4 multiple choice 2 points
how do humans impact the sulfur cycle?
by using clean energy sources
by releasing sulfur dioxide into the atmosphere through industrial processes
by planting more trees
by reducing industrial emissions
5 multiple choice 2 points
which of the following is an abiotic factor in an ecosystem?
sunlight
deer
trees
bacteria
6 multiple choice 2 points
what happens to most of the energy as it moves up the food chain in an ecosystem?
it is stored as potential energy.
it is converted into electrical energy.
it is lost as heat energy.
it stays the same.

Explanation:

• Question 4: Human activities like industrial processes release sulfur dioxide ($SO_2$) into the atmosphere. Clean energy sources (e.g., solar, wind) reduce sulfur emissions. Planting trees and reducing industrial emissions are actions that can mitigate negative impacts on the sulfur cycle rather than cause significant disruption.
• Question 5: Abiotic factors are non - living components of an ecosystem. Sunlight is a non - living factor. Deer, trees, and bacteria are all living (biotic) components.
• Question 6: As energy moves up the food chain, most of it is lost as heat energy due to metabolic processes (e.g., respiration). Only a small portion (about 10%) is passed on to the next trophic level. Energy is not mainly stored as potential energy in a large amount (except in some specific storage molecules in small quantities relative to the total energy flow), and it is not converted into electrical energy in the context of the food chain energy transfer, and it does not stay the same as there is a significant loss at each trophic level.

Answer:

• Question 4: By releasing sulfur dioxide into the atmosphere through industrial processes
• Question 5: Sunlight
• Question 6: It is lost as heat energy