Science worksheets for Class 7 — with answers

Answer the questions.

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

Answer the questions.

1. Why does a clinical thermometer have a kink?
2. Why do we wear dark clothes in winter?
3. A wind blowing from the sea to the land is called a ______.
4. How does heat from the Sun reach us?
5. The normal temperature of the human body is ______.
6. Name the three ways heat travels.
7. The degree of hotness of a body is called its ______.
8. Why do we wear light-coloured clothes in summer?
9. Why do woollen clothes keep us warm?
10. Name two good conductors of heat.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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