Unit 4 - Lesson 5: Carbon

Question 1

Finish this statement:
“The amount of carbon and nitrogen on Earth is (?).”

Answer 1

The amount of carbon and nitrogen on Earth is FIXED. I.E. It doesn’t change.

Question 2

What two elements are essential for living organisms?

Answer 2

Carbon & Nitrogen

Question 3

What two elements are recycled between all the abiotic and biotic components on Earth?

Answer 3

Carbon & Nitrogen.

Question 4

What process in plants requires carbon?

Answer 4

Photosynthesis. They take CO2 from the air and convert it to glucose. Plants use this to make energy (ATP) by respiration & other important molecules.

Question 5

What is a plants role in a food web? How does this effect a plant’s lifespan?

Answer 5

A plant is a producer. This means organisms in higher trophic levels eat the plants to obtain the carbon for the same reason.

Question 6

Name 5 molecules that contain carbon.

Answer 6

DNA.
RNA.
Amino Acids.
Protein.
ATP.

Question 7

How does carbon leave and enter living organisms?

Answer 7

Carbon leaves living organisms and enters back into the air as CO2 through respiration.

Question 8

How does respiration occur when an organism dies or excretes waste?

Answer 8

Decomposers decompose the organic (living or once living) matter. This gives them the carbon they need for their own respiration. Inherently releasing CO2 back into the air.

Question 9

Even animals that died millions of years ago can release their carbon back into the air when they are burnt as fossil fuels. What is this called?

Answer 9

Combustion.

Question 10

What does releasing too much carbon into our atmosphere cause?

Answer 10

The greenhouse effect

Question 11

Draw a diagram of different ways carbon is released into the air (include photosynthesis, combustion, fossilisation, decomposers and respiration).

Answer 11

https://i.pinimg.com/736x/e9/e4/a9/e9e4a9d5caf0d83c0afdb19a5008ad12.jpg