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Plant Needs and Functions

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Plants and Flowers: What Do They Need?

Flowering plant diagram

🌱 Part 1: What Plants Need to Survive

Plants need several things to grow and stay healthy:

Light - for photosynthesis to make food
Water - absorbed through roots from soil
Carbon dioxide - from air through leaves
Mineral nutrients - from soil (like nitrogen and phosphorus)
Suitable temperature - not too hot or cold
Space - for roots and shoots to grow

1. Which of these does a plant absorb through its roots?

Carbon dioxide

Water and mineral nutrients

Light

Oxygen

2. Fill in the blanks using words from the word bank:

Word Bank: photosynthesis, carbon dioxide, light, food

Plants use __________ and __________ to make __________ during __________.

3. Match each plant part to its main function:
Roots
Stem
Leaves
Flowers
Photosynthesis and gas exchange
Reproduction and making seeds
Support and transport water/nutrients
Absorb water and minerals from soil

🌸 Part 2: Flower Parts and Labelling

4. Label the flower diagram below with these parts:

Word Bank: petal, sepal, anther, stigma, ovary

5. Complete these sentences about flower parts:

a) The __________ produces pollen.

b) The __________ receives pollen during pollination.

c) Seeds develop inside the __________.

d) Colourful __________ attract insects for pollination.

🔬 Part 3: Problem Solving and Investigation

6. Sarah keeps her houseplant in a dark cupboard for two weeks and only gives it water. Predict what will happen to the plant and explain why.
7. Tom waters his plant every day, and the soil becomes very soggy. What problems might this cause for the plant?
8. Design a simple investigation to test how light affects plant growth:

a) What would you change (independent variable)? _________________________

b) What would you measure (dependent variable)? _________________________

c) Name two things you would keep the same to make it a fair test:

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