1.6 Waste Materials From Plants And Animals Flashcards Preview

AQA GCSE - Biology > 1.6 Waste Materials From Plants And Animals > Flashcards

Flashcards in 1.6 Waste Materials From Plants And Animals Deck (14)
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1

Why do materials decay?

They are broken down or digested by microorganisms

2

What is the name for a microorganism that decomposes material?

A decomposer

4

What optimum conditions do decomposers need to digest materials faster?

Warm temperature
Moisture
High pH
Lots of oxygen for respiration
Large surface area

5

What is a stable community?

The processes that remove the materials are balanced by the processes that return materials

Materials are constantly recycled

6

How is carbon dioxide removed from the atmosphere?

By photosynthesis

7

How do plants transfer carbon?

They respire the carbon into the atmosphere

When combusted they release the carbon into the atmosphere

When they die the carbon is now dead organic matter

8

How do animals transfer carbon?

Animals respire the carbon into the atmosphere

They egest waste material which becomes dead organic matter

When they die the carbon is now dead organic matter

9

What two ways can dead organic matter transfer carbon?

Fossilisation
Decomposition

10

Through fossilisation what does dead organic matter become?

Oil into Fossil Fuels

11

How do fossil fuels transfer carbon?

When fossil fuels are combusted they release the carbon into the atmosphere

12

Through decomposition where does the carbon get transferred to from the dead organic matter?

Decomposers

13

How do decomposers transfer carbon?

They respire releasing the carbon into the atmosphere

14

How could you increase co2 levels and temperature at the same time with one act?

Burning fossil fuels does both

15

Name 2 microorganisms that decompose materials

Bacteria
Fungi