B1.5 Energy In Biomass Flashcards Preview

GCSE AQA Biology (old spec) > B1.5 Energy In Biomass > Flashcards

Flashcards in B1.5 Energy In Biomass Deck (24):
1

Define biomass

The dry mass of living material in an animal or plant measured in grams

2

Draw a food chain which has the secondary consumer as a fox.

Grass->rabbit->fox

3

Define producer

Green plants - make food by photosynthesis

4

Define primary consumer

Usually eat plant material - they are herbivores

5

Define secondary consumer

Usually eat animal material - carnivores

6

Define predator

Kill for food. Either secondary or tertiary consumers

7

Define prey

The animals that predators feed on

8

Define scavengers

Feed on dead animals eg. Hyenas

9

Define decomposers

Feed on dead and decaying organisms and in undigested parts of plant and animal matter in faeces

10

How is some energy wasted as it passes each stage in a pyramid of biomass?

Respiration
Movement
Control body temperature
Growth

11

What's the process of decay?

Decomposers can be bacteria and fungi. Detritus feeders start the process of decay. They eat dead animals so they can grow. The waste products are carbon dioxide, water and nutrients.

12

What are the best conditions for decay?

Warm
Moist
Lots of oxygen

13

Why is decay important?

In sewage treatment, the microorganisms break down the bodily waste we produce. Useful in compost heaps and it means waste can be broken down.

14

What's the carbon cycle?

Constantly, a relatively small amount of available carbon is cycled between living things and the environment
The main processes involved are respiration, photosynthesis, combustion, feeding and death.

15

What is a detritus feeder and give an example.

An organism that feed on dead plant or animal matter. Eg. Earth worms, woodlice and millipedes.

16

Where are large amounts of carbon found on earth?

Fossil fuels
Limestone
Atmosphere
Oceans

17

Why is the carbon cycle important?

It ensures that carbon is evenly distributed between the atmosphere and organisms. If too much co2 was in the atmosphere them global warming would be extreme.

18

What are the three fossil fuels?

Coal
Wood
Oil

19

What are the benefits of making compost?

Helps soil retain water and nutrients.
Roots can spread out
Prevents spreading of disease in soil
Compost can hold nutrients tightly
Makes soil easier to work with

20

How do compost heaps work?

Microbes, worms, snails, insects and fungi decompose organic material aerobically. Bacteria are the powerhouse of s compost heap. They break down plant matter and create carbon dioxide and heat.

21

How do we recycle organic waste?

Compost heap
Compost bin
Council composting
Sewage treatment plants

22

What's a sankey diagram?

A type of graph with arrow shapes which shows total energy taken in and how it is transferred.

23

Why do we normally eat herbivores rather than carnivores?

There are less stages in the food chain. Eating plants is the most efficient way of feeding the world population, but if we want meat less energy is wasted your eating herbivores.

24

What does organic waste mean?

Waste from living organisms containing carbon compounds (such as carbohydrates, fats and proteins).