Science worksheets for Class 7 — with answers

Answer the questions.

1. Which gas is released during photosynthesis?
2. The process by which green plants make food is called ______.
3. Name an insectivorous plant.
4. Fungi that feed on dead matter are called ______.
5. Which organ produces bile?
6. Tiny pores on leaves are called ______.
7. Lichens are a partnership of ______ and ______.
8. Plants like Cuscuta that take food from other plants are called ______.
9. How does an amoeba take in food?
10. Name the raw materials for photosynthesis.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. Which tissue carries food in plants?
2. Respiration without oxygen is called ______ respiration.
3. Blood vessels that carry blood to the heart are ______.
4. Which tissue carries water in plants?
5. The red pigment in blood is ______.
6. Breaking down food to release energy is called ______.
7. Insects breathe through tiny holes called ______.
8. How many chambers does the human heart have?
9. Blood vessels that carry blood away from the heart are ______.
10. How do earthworms breathe?

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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