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Plant Organs 01
The energy for photosynthesis to take place in these leaves comes from sunlight.

Plant Organs 01

Plants have organs too. In KS3 Science, pupils learn how roots, stems, and leaves each play a role in keeping plants alive, growing, and reproducing successfully.

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Fascinating Fact:

Giant water lilies have leaves so big and strong that they can hold the weight of a small child.

In KS3 Science, plant organs are studied to understand how different parts of a plant work together. Roots absorb water, stems transport it, and leaves carry out photosynthesis.

Key Terms

  • Photosynthesis: The process where plants make food using sunlight, carbon dioxide, and water.
  • Root: The organ that anchors the plant and absorbs water and nutrients from the soil.
  • Stem: The organ that supports the plant and transports water, nutrients, and food.

Frequently Asked Questions (Click to see answers)

What are the main plant organs studied in KS3 Science?

The main plant organs are roots, stems, and leaves. These organs work together to absorb water, transport nutrients, and produce food for the plant.

Why are leaves important for plants?

Leaves are important because they carry out photosynthesis, making food for the plant using sunlight, water, and carbon dioxide.

How do roots help a plant survive?

Roots anchor the plant in the soil and absorb water and minerals. They are vital for the plant’s stability and growth.

Try These Related Quizzes

1 .
Which organ is used to absorb water?
Leaf
Root hair
Root tip
Stem
96% of a cucumber is water
2 .
Which organ is used in photosynthesis?
Flower
Leaf
Root hair
Root tip
Photosynthesis means making (synthesis) through light (photo)
3 .
Which two substances are produced in photosynthesis?
Carbon dioxide and water
Glucose and carbon dioxide
Oxygen and carbon dioxide
Oxygen and glucose
Oxygen leaves through the stomata
4 .
Plants make their own food. This is stored as what?
Fat
Glucose
Protein
Starch
You can test for starch in a leaf by using iodine
5 .
Which two substances are used in photosynthesis?
Carbon dioxide and oxygen
Carbon dioxide and water
Oxygen and glucose
Oxygen and water
Carbon dioxide enters through stomata (small holes) on the underside of a leaf
6 .
What colour is chlorophyll?
Brown
Green
Red
White
It is why most plants look green
7 .
Which organ is used in pollination?
Flower
Leaf
Root
Stem
Flowers often contain nectar and some give off a scent in order to attract insects
8 .
Photosynthesis does not occur in roots because .......
Root hair cells absorb water
Root hair cells do not have chloroplasts
Roots anchor plants in soil
Roots are used to transport water
They are usually underground organs so little or no light reaches them anyway
9 .
Energy for photosynthesis comes from .......
Glucose
Oxygen
Sunlight
Water
When plants don't get enough light, they can't make enough food and they become weakened and can die
10 .
Nitrates provide nitrogen. This is important for what?
Good roots
Green leaves
Purple flowers
Yellow flowers
Nitrates are also used to make proteins for growth
Author:  Sue Davison (Chemistry Specialist & KS3 Science Teacher, Quiz Writer)
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