Energy In Biomass

Question 1

Radiation form the sun is the source of energy for most communities of living organisms, a small amount of which is absorbed by green plants and algae
TRUE OR FALSE

Answer 1

True

Question 2

WHAT IS A FOOD CHAIN

Answer 2

A food chain shows what eats what in a particular habitat.

Question 3

WHAT ARE PYRAMIDS OF BIO MASS

Answer 3

Pyramids of biomass reveal the mass of living material at each stage in a chain.

• the amount of materials and energy decreases from one stage to the next

Question 4

STAGES OF THE FOOD CHAIN

Answer 4

Producer = green plants and algae, they make food through photosynthesis

Primary consumer = usually eat plant material, herbivores (rabbits, cows)

Secondary consumer = usually eat animals, carnivores (cats, lions)

Predators = kill for food, they are usually secondary or territory consumers

Question 5

WHAT IS ENERGY TRANSFER

Answer 5

Energy is transferred along food chains from one stage to the next but not all the energy is available to organisms at one stage can be absorbed by organisms to the next one

The amount of energy decreased from one stage to the next.

Question 6

WHERE DOES THE ENERGY GO IN ENERGY TRANSFER

Answer 6

• some energy available goes into growth and production of offspring
• some is released through respiration (movement and other processes)
• some energy is lost in waste materials

Question 7

WHAT DOES BIOMASS MEAN

Answer 7

Biomass means the mass of living material at a stage in a food chain

Question 8

3 DECAY PROCESSES

Answer 8

• decay is an essential life process that digests food or waste matter and recycles material
• material from living things decay because they are digested (broken down) by microorganisms
• these microorganisms cause decay by realising enzymes that break down compounds to be absorbed by their cells

Question 9

WHAT ARE THE TWO MAIN GROUPS OF DECOMPOSERS

Answer 9

• BACTERIA

* FUNGI

Question 10

3 FACTORS AFFECTING DECAY

Answer 10

• moisture
• temperature
• amount of available oxygen

Question 11

WHEN ARE MICROORGANISMS MOST ACTIVE AND DIGEST MATERIALS FASTEST

Answer 11

Mircroorganisms are more active and digest materials faster when they are in moist, warm and aerobic conditions

But will digest more slowly in dry, can of and anaerobic conditions

Question 12

HOW ARE SUBSTANCES CONTINUOUSLY RECYCLED

Answer 12

Some of the substances released during decay are needed by plants for healthy growth

• in a stable community of living things processes that return substances to the environment (such as decay) are balanced by the processes that remove and use substances in this way, the substances are continuously recycled

Question 13

WHAT IS THE CARBON CYCLE

Answer 13

The carbon cycle shows how carbon moves from the atmosphere, through various animals and plants, and then back into the atmosphere again

Question 14

WHAT CARBON COMPOUNDS DO ALL CELLS CONTAIN

Answer 14

• proteins
• fats
• carbohydrates

Question 15

CARBON IS PASSED FROM THE ATMOSPHERE, AS CARBON DIOXIDE TO LIVING THINGS…

Answer 15

… it is passed from one organism to the next then returned into the atmosphere again

Question 16

HOW IS CARBON DIOXIDE REMOVED FROM THE ATMOSPHERE

Answer 16

Photosynthesis

Question 17

HOW IS CARBON DIOXIDE RETURNED INTO THE ATMOSPHERE

Answer 17

Respiration

Question 18

HOW IS CARBON PASSED FROM ONE ORGANISM TO THE NEXT

actual carbon cycle

Answer 18

1. An animal eats a plant
2. Carbon from the plant becomes part of the fats and proteins of the animals
3. Microorganisms and some animals then feed on the waste material from animals, and the remains of dead animals and plants
4. The carbon then becomes part of these microorganisms