Science worksheets for Class 7 — with answers

Answer the questions.

1. Which gas is released during photosynthesis?
2. Which animals chew the cud?
3. Where is most food absorbed in our body?
4. The process by which green plants make food is called ______.
5. Plants like Cuscuta that take food from other plants are called ______.
6. How does an amoeba take in food?
7. Which organ produces bile?
8. Fungi that feed on dead matter are called ______.
9. Name an insectivorous plant.
10. Name the raw materials for photosynthesis.

Answer the questions.

1. Why does a clinical thermometer have a kink?
2. Why do we wear dark clothes in winter?
3. Heat moves through liquids and gases by ______.
4. The normal temperature of the human body is ______.
5. Why do we wear light-coloured clothes in summer?
6. Name the three ways heat travels.
7. How does heat from the Sun reach us?
8. The degree of hotness of a body is called its ______.
9. Heat moves through solids by ______.
10. Why do woollen clothes keep us warm?

Answer the questions.

1. Name an acid found in lemon.
2. What is formed when an acid reacts with a base?
3. What colour does blue litmus turn in an acid?
4. Solutions that are neither acidic nor basic are ______.
5. Name a base used to treat acidity in the stomach.
6. What colour does red litmus turn in a base?
7. Name an acid found in curd.
8. Vinegar contains ______ acid.
9. Turmeric turns ______ in a base.
10. Name a natural indicator.

Answer the questions.

1. Is rusting of iron a physical or a chemical change?
2. Is burning of paper a physical or a chemical change?
3. Coating iron with zinc is called ______.
4. Name one way to prevent rusting.
5. Is dissolving sugar in water a physical or a chemical change?
6. A change in which a new substance is formed is a ______ change.
7. What gas is formed when vinegar reacts with baking soda?
8. Getting large crystals of a substance from its solution is called ______.
9. What two things are needed for iron to rust?
10. Is tearing paper a physical or a chemical change?

Answer the questions.

1. Why do we get muscle cramps after heavy exercise?
2. Blood vessels that carry blood to the heart are ______.
3. Yeast respires anaerobically and produces ______.
4. Breaking down food to release energy is called ______.
5. How do earthworms breathe?
6. Respiration without oxygen is called ______ respiration.
7. Blood vessels that carry blood away from the heart are ______.
8. The red pigment in blood is ______.
9. Which tissue carries food in plants?
10. Loss of water from leaves as vapour is called ______.

Answer the questions.

1. A car covers 120 km in 2 hours. Find its speed.
2. Which instrument shows the distance covered by a vehicle?
3. A bus moves at 50 km/h. How long does it take to cover 200 km?
4. What is the SI unit of speed?
5. Speed = ______ ÷ ______
6. The time taken by a pendulum for one oscillation is its ______.
7. 1 hour = ______ seconds
8. Which instrument shows the speed of a vehicle?
9. Name two ways people measured time in the past.
10. A cyclist covers 900 m in 3 minutes. Find the speed in m/min.

Answer the questions.

1. Who showed that current makes a compass needle move?
2. Draw (or name) the symbol of an electric cell.
3. Which modern switch replaces the fuse?
4. In a circuit, the bulb glows only when the switch is ______.
5. Name one use of an electromagnet.
6. Two or more cells joined together make a ______.
7. Which effect of current makes an electric bell ring?
8. The wire in a heater is made of ______.
9. A safety device that melts when too much current flows is a ______.
10. The heating effect of current is used in ______.

Answer the questions.

1. Name the device that splits white light into seven colours.
2. A spoon’s shiny inside surface acts like a ______ mirror.
3. The splitting of white light into colours is called ______.
4. The image in a plane mirror is ______ and the same size.
5. Which lens is used as a magnifying glass?
6. Which mirror do dentists use?
7. In a plane mirror, your right hand appears as the ______ hand.
8. Name a natural example of white light splitting into colours.
9. Which mirror is used as the rear-view mirror in vehicles?
10. The angle of incidence is ______ to the angle of reflection.