Cycles (10)

Question 0

Word equation for photosynthesis

Answer 0

Carbon dioxide + water –> glucose + oxygen

Question 1

Word equation for respiration

Answer 1

Glucose + oxygen –> water + carbon dioxide

Question 2

What sort of bacteria carry out nitrification

Answer 2

Nitrifying bacteria

Question 4

Plants absorbing nitrates through their roots and turning them into protein is called ________________

Answer 4

Assimilation

Question 5

Why is acid rain acidic

Answer 5

Because Co2 is dissolved in it

Question 6

Nitrates in the soil can be turned back into ______________ gas in the atmosphere by ______________ bacteria and this process is called _________________

Answer 6

Nitrogen
Denitrifying
Denitrification

Question 7

Decomposition is the __________ of dead organisms, such as bread. The process releases inorganic mineral ions, such as _________, in the soil

Answer 7

Decay

Nitrates

Question 8

Carbon cycle: Decomposition (decay) releases a gas called _________ _________ into the air

Answer 8

Carbon dioxide

Question 9

Carbon cycle: Carbon dioxide is taken out of the air by plants and used in a process called _________________ to make food

Answer 9

Photosynthesis

Question 10

What is the name of the process used to describe dead organisms and faeces turning into ammonium salts

Answer 10

Decay

Question 11

Name one type of chemical substance produced by a pea plant which contains the element nitrogen

Answer 11

Amino acids

Question 12

Nitrogen cycle: What is nitrification

Answer 12

Ammonia in soil becoming nitrites

Question 13

Nitrogen cycle:

Ammonia in soil ——> __________ ——–> __________

Answer 13

Ammonia in soil —> Nitrites —> Nitrates

Question 14

What gas, found in air is needed for burning to happen

Answer 14

Oxygen

Question 15

What can decomposers do

Answer 15

Break down solid waste materials from animals

Question 16

What is decay

Answer 16

The breakdown of materials in dead animals and plants

Question 17

Microbes break down faster when they are in _______ and ________ conditions

Answer 17

Warm and moist

Question 18

Many microbes work better if there is more ___________ in their environment

Answer 18

Oxygen

Question 19

Carbon cycle: Photosynthesis causes the amount of carbon dioxide in the air to _____________

Answer 19

Decrease

Question 20

Carbon cycle: Decay causes the amount of carbon dioxide in the air to _____________

Answer 20

Increase

Question 21

Carbon cycle: Burning causes the amount of carbon dioxide in the air to _____________

Answer 21

Increase

Question 22

Carbon cycle: Respiration causes the amount of carbon dioxide in the air to _____________

Answer 22

Increase

Question 23

Carbon cycle: Co2 begins in the ______________. Plants take in the carbon dioxide and ___________________ and it goes back into the atmosphere by ____________

Answer 23

Atmosphere
Photosynthesise
Respiration

Question 24

Carbon cycle: Animals take Co2 from plants and then ___________ so it goes back into the atmosphere

Answer 24

Respire

Question 25

Carbon cycle: Plants, trees and animals die and Co2 returns to the atmosphere by _______________

Answer 25

Decomposers

Question 26

Carbon cycle: Plants and animals end up in deposits underground and form _________ _______. And then Co2 returns to the atmosphere from the _______________ (burning) of fossil fuels

Answer 26

Fossil fuels

Combustion

Question 27

Carbon cycle: Animals use Co2 in oceans and then die and become fossils, so Co2 ______________ into oceans

Answer 27

Dissolves

Question 28

Carbon cycle: Co2 from volcanoes goes back into the _____________

Answer 28

Atmosphere

Question 29

Nitrogen cycle: How does nitrogen gas become protein plants

Answer 29

By nitrogen-fixing bacteria

Question 30

Nitrogen cycle: __________ can fix N2 in soil as nitrares

Answer 30

Lightning

Question 31

Nitrogen cycle: Name 2 ways nitrogen leaves the atmosphere

Answer 31

Lightning
Free-living nitrogen-fixing bacteria
Nitrogen-fixing bacteria in root nodules of legumes (peas, beans, clover)

Question 32

Nitrogen cycle: How does ammonia (NH3) become Nitrites

Answer 32

By nitrifying bacteria

Question 33

Nitrogen cycle: How do nitrites (NO2) become nitrates (NO3-)

Answer 33

Also by nitrifying bacteria

Question 34

Nitrogen cycle: Decomposers turn the protein in dead things into ____________

Answer 34

Ammonia

Question 35

Nitrogen cycle: What sort of bacteria carry out nitrification

Answer 35

Nitrifying bacteria

Question 36

Carbon cycle: Photosynthesis ‘fixes’ carbon atoms from Co2 into __________ compounds

Answer 36

Organic

Question 37

Nitrogen cycle: Decomposers produce ammonia from the nitrogen in ___________, ________ ______ and vitamins

Answer 37

Proteins
Amino acids
Vitamins

Question 38

What is leaching

Answer 38

Rainwater washing nitrates out of soil

Question 39

Why are fungi called decomposers

Answer 39

Because they break down dead things

Question 40

Give one type of decomposer

Answer 40

Bacteria

Question 41

Detritus feeders such as maggots and worms start the process of ________, and _________________ finish it

Answer 41

Decay

Decomposers

Question 42

Micro-organisms digest the dead and ____________ material

Answer 42

Decaying

Question 43

Name 3 conditions needed for decay

Answer 43

Warm
Moist
Oxygen

Question 44

Carbon cycle: Name 3 ways Co2 returns to the air

Answer 44

Burning
Respiration of animals
Respiration of plants
Volcanoes

Question 45

Carbon cycle: Name 2 ways Co2 leaves the environment

Answer 45

Photosynthesis

Dissolving into oceans