What does anaerobic mean?
In the presence of oxygen
Without oxygen
Without air
What gases make up biogas?
Methane and ethanol
Propane and carbon dioxide
Methane and carbon dioxide
What effect does lowering temperature have on the decay of milk?
It slows it down
No effect
It speeds it up
What factors affect the rate of decay?
Temperature, water and oxygen
Temperature, water and light
Temperature, light and wind strength
What carbon conversion occurs in aerobic respiration?
Glucose to carbon dioxide
Carbon dioxide to glucose
Fuel to carbon dioxide
What process do decomposers speed up?
Photosynthesis
Respiration
Decay
What do plants compete for?
Light, water and space
Light, food and mates
Light, food and territory
What do animals compete for?
Food, mates and light
Food, mates and territory
Food, space and light
Which process does NOT release carbon dioxide into the atmosphere?
Combustion
Which process results in water falling from clouds?
Precipitation
Transpiration
Condensation