Science worksheets for Class 7 — with answers

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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