Science worksheets for Class 7 — with answers

Answer the questions.

1. Fungi that feed on dead matter are called ______.
2. Which animals chew the cud?
3. Which organ produces bile?
4. Where is most food absorbed in our body?
5. Name the longest part of the alimentary canal.
6. How does an amoeba take in food?
7. Name an insectivorous plant.
8. Name the raw materials for photosynthesis.
9. Tiny pores on leaves are called ______.
10. The process by which green plants make food is called ______.

Answer the questions.

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

Answer the questions.

1. Why do we rub baking soda on an ant bite?
2. Name an acid found in curd.
3. Name a base used to treat acidity in the stomach.
4. Turmeric turns ______ in a base.
5. Name an acid found in lemon.
6. Name a natural indicator.
7. What colour does blue litmus turn in an acid?
8. What colour does red litmus turn in a base?
9. Solutions that are neither acidic nor basic are ______.
10. Vinegar contains ______ acid.

Answer the questions.

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

Answer the questions.

1. Insects breathe through tiny holes called ______.
2. The red pigment in blood is ______.
3. Which tissue carries water in plants?
4. How do earthworms breathe?
5. Blood vessels that carry blood to the heart are ______.
6. Which tissue carries food in plants?
7. Blood vessels that carry blood away from the heart are ______.
8. Why do we get muscle cramps after heavy exercise?
9. Breaking down food to release energy is called ______.
10. How many chambers does the human heart have?

Answer the questions.

1. A bus moves at 50 km/h. How long does it take to cover 200 km?
2. A train moves at 80 km/h for 3 hours. How far does it go?
3. Name two ways people measured time in the past.
4. Which instrument shows the speed of a vehicle?
5. Which instrument shows the distance covered by a vehicle?
6. The time taken by a pendulum for one oscillation is its ______.
7. Motion with changing speed is called ______ motion.
8. What is the SI unit of speed?
9. A cyclist covers 900 m in 3 minutes. Find the speed in m/min.
10. 1 hour = ______ seconds

Answer the questions.

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

Answer the questions.

1. White light is made of ______ colours.
2. In a plane mirror, your right hand appears as the ______ hand.
3. The splitting of white light into colours is called ______.
4. A spoon’s shiny inside surface acts like a ______ mirror.
5. Name a natural example of white light splitting into colours.
6. A lens that is thicker in the middle is a ______ lens.
7. A lens that is thinner in the middle is a ______ lens.
8. The image in a plane mirror is ______ and the same size.
9. Name the device that splits white light into seven colours.
10. Which lens is used as a magnifying glass?