Science worksheets for Class 7 — with answers

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. Insects breathe through tiny holes called ______.
2. Which tissue carries water in plants?
3. The red pigment in blood is ______.
4. Why do we get muscle cramps after heavy exercise?
5. Respiration without oxygen is called ______ respiration.
6. Blood vessels that carry blood away from the heart are ______.
7. The kidneys remove waste from blood as ______.
8. How do earthworms breathe?
9. Loss of water from leaves as vapour is called ______.
10. Yeast respires anaerobically and produces ______.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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