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WorksheetsReview Midterm Unit 1 - Photosynthesis and Carbon Cycles
Total questions: 20
Worksheet time: 10mins
Why do plants need magnesium?
Make chlorophyll
Make protein
Absorb water
Transport blood
A scientist investigated whether giving plants different quantities of magnesium affected their growth.
He measured growth by counting the number of new leaves produced.
Write down a hypothesis he could test in his investigation.
With more magnesium, less leave grows
Increasing the amount of magnesium given to plants will increase the number of new leaves produced
With less magnesium, more new leaves grows
More water given, the more magnesium produced
Here are his results.
• 0.5 mg magnesium: 3 new leaves
• 1.0 mg of magnesium: 5 new leaves
• 1.5 mg of magnesium: 6 new leaves
• 2.0 mg of magnesium: 4 new leaves
• 2.5 mg of magnesium: 1 new leaf
Which amount of magnesium gives the greatest number of new leaves growth?
0.5 mg
1.0 mg
1.5 mg
2.0 mg
Complete the sentences. Choose the correct word
67 million years ago, an _________________________ collided with the Earth.
asteroid
photosynthesise
climate
mass
Complete the sentences. Choose the correct words.
The _________________________ of the Earth changed, as it became cooler. Many animals could not survive because they did not have enough food. There was a _________________________ extinction.
climate, asteroid
climate, photosynthesise
climate, weather
climate, mass
Complete the sentences. Choose the correct word.
Less light could reach the ground, so plants could not _________________________
asteroid
photosynthesise
climate
mass
Here are some statements about the carbon cycle.
Tick (✓) the two correct statements.
Plants take carbon dioxide from the air when they respire.
Decomposers obtain their carbon from dead animals and plants.
Combustion of fossil fuels adds carbon dioxide to the air.
Carbon dioxide is returned to the air by photosynthesis.
Explain the difference between chloroplasts and chlorophyll.
Chloroplast is located in the chlorophyll which is orange pigment.
Chloroplast is located in the chlorophyll which is green pigment.
chlorophyll which is orange pigment is located in chloroplast which is part of cell.
chlorophyll which is green pigment is located in chloroplast which is part of cell..
Choose the correct word to match each description.
This gas is used by plants in photosynthesis ____________
chloroplast
chlorophyll
oxygen
carbon dioxide
This gas is made by plants in photosynthesis.
soil
oxygen
carbon dioxide
chlorophyll
chloroplast
Plants get their water for photosynthesis from here.
soil
chlorophyll
chloroplast
carbon dioxide
oxygen
This green pigment absorbs energy from sunlight.
chlorophyll
chloroplast
carbon dioxide
soil
oxygen
These tiny holes in a leaf allow gases to diffuse in and out.
carbon dioxide
chloroplast
stomata
oxygen
chlorophyll
Match each of these labels to the correct letter on the diagram.
carbon in fossil fuels : ______
A
B
C
D
Match each of these labels to the correct letter on the diagram.
carbon compounds in animals : ______
A
B
C
D
Match each of these labels to the correct letter on the diagram.
carbon dioxide in the air : ______
A
B
C
D
Match each of these labels to the correct letter on the diagram.
carbon compounds in plants : ______
A
B
C
D
Match each of these labels to the correct number on the diagram.
Feeding : _____
1
2
3
Match each of these labels to the correct number on the diagram.
Photosynthesis : _____
1
2
3
Match each of these labels to the correct number on the diagram.
Combustion : _____
1
2
3
