Lesson T2.1.2
T2.1.2 Photosynthesis and life on Earth Quiz: KS3 Biology, Unit 2
20 questions
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Lesson T2.1.2, Photosynthesis and life on Earth: 20 multiple choice questions for the KS3 Biology (National Curriculum), Unit 2: Material cycles and energy, written with Revision Ninja.
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The 20 questions
-
Which organisms carry out most marine photosynthesis?
- Jellyfish
- Deep-sea fish
- Coral reefs
- Phytoplankton
-
What do all food chains start with?
- Apex predators
- Decomposers
- Producers
- Primary consumers
-
What term describes organisms that make their own food using light energy?
- Consumers
- Producers
- Predators
- Decomposers
-
Which gas is kept at a steady level in the atmosphere largely through photosynthesis?
- Oxygen
- Nitrogen
- Hydrogen
- Argon
-
What is the effect of deforestation on atmospheric carbon dioxide?
- Levels decrease
- Levels stay constant
- Levels fluctuate wildly
- Levels increase
-
What energy origin is stored in fossil fuels?
- Sunlight
- Nuclear fusion
- Geothermal heat
- Lunar gravity
-
How is most energy lost between each step in a food chain?
- As sound
- As movement
- As heat
- As light
-
What is the ultimate energy source for nearly all living things?
- The Sun
- Geothermal heat
- Fossil fuels
- The Moon
-
What are organic molecules made by photosynthesis used for by other organisms?
- A source of oxygen
- A type of gas
- A form of sunlight
- An energy store
-
What do planted fish tanks release into the water in daylight?
- Nitrogen
- Carbon dioxide
- Glucose
- Oxygen
-
What happens to atmospheric oxygen levels if photosynthesis stops?
- Levels rise
- Levels fluctuate wildly
- Levels fall
- Levels stay constant
-
Which process returns carbon dioxide to the atmosphere?
- Respiration
- Photosynthesis
- Transpiration
- Condensation
-
Which organisms capture light energy at the start of food chains?
- Secondary consumers
- Primary consumers
- Producers
- Decomposers
-
What are the correct reactants needed for photosynthesis?
- Carbon dioxide and water
- Oxygen and carbon dioxide
- Glucose and oxygen
- Nitrogen and water
-
Why do most animals depend on plants?
- Plants are parasites
- Plants are decomposers
- Plants are predators
- Plants are producers
-
Why is deforestation linked to increased climate change?
- Less carbon dioxide removed
- More nitrogen released
- More oxygen produced
- Less water evaporated
-
What do ocean phytoplankton primarily produce for Earth?
- Oxygen
- Carbon dioxide
- Nitrogen
- Glucose
-
In what form is energy transferred when an animal eats a plant?
- Thermal energy
- Light energy
- Chemical energy
- Kinetic energy
-
In a typical food web, which trophic group has the largest population?
- Primary consumers
- Apex predators
- Secondary consumers
- Producers
-
Which human activity directly reduces global photosynthesis?
- Fishing in oceans
- Building wind farms
- Clearing rainforest
- Planting trees
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