B4.1.1 Ecosystems

Question 1

Ecosystem

Answer 1

All of the living organisms and physical conditions in an area

Question 2

Community

Answer 2

All of the organisms within an ecosystem

Question 3

Habitat

Answer 3

Where the community live

Question 4

Population

Answer 4

Total number of organisms of each species

Question 5

Producers

Answer 5

Organisms that make their own food by photosynthesis

Question 6

Consumers

Answer 6

Organisms that cannot make their own food, eat other organisms to gain energy, (all animals)

Question 7

Decomposers

Answer 7

Consumers which gain energy by feeding on dead or decaying material

Question 8

How is energy transferred to producers?

Answer 8

Light energy from sun –> chlorophyll in cells of producer –> carbon dioxide + water = glucose + oxygen
glucose stores energy in chemical bonds = creates carbs, proteins, fats as energy stores or used for growth and repair

Question 9

Biomass

Answer 9

Mass of living material present in an organism

Increases as organism grows

Question 10

How is energy transferred between organisms?

Answer 10

Consumers eat producers, organism respires and energy stored in food is transferred in production of ATP

Question 11

Arrows in food chain

Answer 11

Show the transfer of biomass and energy transfer

Left to right, points to eater

Question 12

Each step in food chain is…

Answer 12

Trophic level

Question 13

How are consumers further classified?

Answer 13

Primary consumer-herbivores (eat producer)
Secondary consumer-carnivores (eat primary consumer)
Tertiary consumer-carnivores (eat secondary consumer)

Question 14

Food web

Answer 14

Shows all of the animals which eat an organism