Science worksheets for Class 7 — with answers

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. Blood vessels that carry blood away from the heart are ______.
2. Which tissue carries water in plants?
3. Blood vessels that carry blood to the heart are ______.
4. The red pigment in blood is ______.
5. Insects breathe through tiny holes called ______.
6. Why do we get muscle cramps after heavy exercise?
7. Which tissue carries food in plants?
8. Breaking down food to release energy is called ______.
9. The kidneys remove waste from blood as ______.
10. Respiration without oxygen is called ______ respiration.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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