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. Name the longest part of the alimentary canal.
4. Plants like Cuscuta that take food from other plants are called ______.
5. Where is most food absorbed in our body?
6. Which gas is released during photosynthesis?
7. Which organ produces bile?
8. Name the raw materials for photosynthesis.
9. Where does digestion of food begin in humans?
10. Name an insectivorous plant.

Answer the questions.

1. The normal temperature of the human body is ______.
2. Name two good conductors of heat.
3. Name the three ways heat travels.
4. Name two poor conductors of heat (insulators).
5. Why do we wear light-coloured clothes in summer?
6. Why do we wear dark clothes in winter?
7. Heat moves through solids by ______.
8. A wind blowing from the sea to the land is called a ______.
9. Why do woollen clothes keep us warm?
10. Why does a clinical thermometer have a kink?

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. Blood vessels that carry blood away from the heart are ______.
2. Loss of water from leaves as vapour is called ______.
3. How do earthworms breathe?
4. Which tissue carries food in plants?
5. The kidneys remove waste from blood as ______.
6. Why do we get muscle cramps after heavy exercise?
7. The red pigment in blood is ______.
8. How many chambers does the human heart have?
9. Insects breathe through tiny holes called ______.
10. Yeast respires anaerobically and produces ______.

Answer the questions.

1. Which instrument shows the distance covered by a vehicle?
2. Motion with changing speed is called ______ motion.
3. Speed = ______ ÷ ______
4. The time taken by a pendulum for one oscillation is its ______.
5. A cyclist covers 900 m in 3 minutes. Find the speed in m/min.
6. Name two ways people measured time in the past.
7. A train moves at 80 km/h for 3 hours. How far does it go?
8. A car covers 120 km in 2 hours. Find its speed.
9. Which instrument shows the speed of a vehicle?
10. A bus moves at 50 km/h. How long does it take to cover 200 km?

Answer the questions.

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

Answer the questions.

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