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Plant Life Cycle Worksheet
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Plant Life Cycle Worksheet
Read the field notes and complete the challenges. Use evidence from the notes and your science knowledge.
A sunflower begins as a seed. When the seed has enough water, oxygen and suitable warmth, it germinates. A tiny root grows down and a shoot grows up. The seedling makes leaves and uses sunlight, water and carbon dioxide to make sugars by photosynthesis. As it grows, its roots take up water and mineral nutrients from the soil. A mature sunflower produces flowers. After pollination, seeds develop in the flower head. Some seeds may be carried away and grow into new plants. The cycle can begin again.
Trace the cycle
1.Put these stages in the order they happen, starting with a seed: seedling, new seeds, germination, flowering adult.
2.Which three conditions does a sunflower seed need for germination, according to the field notes?
3.Choose the best explanation: Why does the first root grow down from a germinating seed?
- To absorb water and anchor the young plant
- To make flowers immediately
- To collect sunlight underground
- To produce seeds before leaves grow
4.A seedling is kept in a dark cupboard but watered regularly. Predict one change you might observe and explain why.
5.Match each plant part to its main job in the life cycle.
- Roots
- Leaves
- Flower
- Use light to make sugars by photosynthesis
- Take up water and mineral nutrients; anchor the plant
- Can be pollinated and develop seeds
Investigate and explain
6.Two sunflower seeds are planted in identical pots. One pot is watered; the other is not. Name the variable changed and one thing that should be kept the same for a fair test.
7.True or false: Plants get all the food they need by absorbing it from the soil. Correct the statement if it is false.
TrueFalse
8.Complete the explanation: During photosynthesis, leaves use energy from to make sugars from water and .
9.After a flower is pollinated, seeds form. Explain how seed dispersal can help a new plant survive.
10.Design a simple investigation to find out whether light affects seedling growth. State what you would change, what you would measure, and one condition you would keep the same.
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