Topic - Photosynthesis
In these Worksheets for Science you will find different questions related to the topic Photosynthesis that will help you to score more marks.
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| Worksheets for Science ( Topic - Photosynthesis) |
Multiple Choice Questions
1. Green plants are also known as these. __________________
(a) autotrophs (b) producers (c) both a and b
2. ________________ helps in the absorption of water.
(a) stem (b) roots (c) leaves
3. ________________ help in the process of transpiration.
(a) roots (b) stem (c) stroma
4. There are ______________guard cells in each stroma.
(a) two (b) three (c) four
5. Guard cells are _______________ shaped.
(a) oval (b) pear (c) bean
6. __________________ helps in absorbing energy from the sun.
(a) chlorophyll (b) stomata (c) both a and b
7. The diameter of chloroplast ranges between ______________ micrometer.
(a) 5-10 (b) 1-2 (c) 4-6
8. The ______________ membrane of chloroplasts is folded into thylakoids.
(a) inner (b) outer (c) none
9. Chlorophyll splits the water molecule to release _______________.
(a) carbon (b) oxygen (c) nitrogen
10. The optimum temperature for photosynthesis ranges between _________________.
(a) 10°C-20°C (b) 20°C-40°C (c) 25°C-55°C
Answers - 1.both a and b 2.roots 3.stomata 4.two 5.bean 6.chlorophyll
7.4-6 8.inner 9.oxygen 10.20°C-40°C
Fill ups
1. The process by which green plants make their own food is known as _______________.
2. Green plants use carbon dioxide, _______________ and ______________ to prepare their own food.
3. Carbon dioxide is absorbed through _________________.
4. Oxygen is produced during the process of _________________.
5. Plants store extra food in the form of __________________.
6. Tiny pores on the surface of leaves are known as _______________.
7. Atmosphere consists of ______________ of oxygen.
8. The principal source of light on the earth is _______________.
9. Plants convert ________________ energy of the sun into _________________ energy of food.
10. ____________________ are the organelles that provide chlorophyll to the leaves.
Answers - 1.photosynthesis 2.water, chlorophyll 3.stomata 4.photosynthesis
5.starch 6.stomata 7.0.03-0.04% 8.sun 9.light, chemical 10.chloroplast
Write True if the statement is correct and False if the statement is incorrect.
1. Stomata are present only on the lower surface of the leaves.
2. The outer wall of guard cells is thicker than its inner wall.
3. The stomata open when the guard cells are full of water.
4. Stomata generally remain close during the day.
5. The main source of carbon dioxide for plants is atmosphere.
6. Plants can perform photosynthesis in dark.
7. Chlorophyll imparts green colour to leaves.
8. Leaves are arranged at right angles to the source of light.
9. Chloroplasts consist of a single membrane.
10. The splitting of CO2 into sugar is a light dependent reaction.
Answers - 1.False 2.False 3.True 4. False 5.True 6.False 7.True 8.True 9.False 10.False
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