Science worksheets for Class 7 — with answers

Answer the questions.

1. Name an insectivorous plant.
2. How does an amoeba take in food?
3. Plants like Cuscuta that take food from other plants are called ______.
4. Where does digestion of food begin in humans?
5. Lichens are a partnership of ______ and ______.
6. Name the longest part of the alimentary canal.
7. Where is most food absorbed in our body?
8. Tiny pores on leaves are called ______.
9. Which organ produces bile?
10. Fungi that feed on dead matter are called ______.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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