Science worksheets for Class 7 — with answers

Answer the questions.

1. Fungi that feed on dead matter are called ______.
2. Which gas is released during photosynthesis?
3. Where is most food absorbed in our body?
4. Name an insectivorous plant.
5. Where does digestion of food begin in humans?
6. Name the raw materials for photosynthesis.
7. Plants like Cuscuta that take food from other plants are called ______.
8. Name the longest part of the alimentary canal.
9. Tiny pores on leaves are called ______.
10. Which animals chew the cud?

Answer the questions.

1. How does heat from the Sun reach us?
2. Name two good conductors of heat.
3. The normal temperature of the human body is ______.
4. Why do we wear light-coloured clothes in summer?
5. Name the three ways heat travels.
6. Heat moves through solids by ______.
7. Why do we wear dark clothes in winter?
8. Heat moves through liquids and gases by ______.
9. Why do woollen clothes keep us warm?
10. Name two poor conductors of heat (insulators).

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. The angle of incidence is ______ to the angle of reflection.
2. Name a natural example of white light splitting into colours.
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. Which mirror is used as the rear-view mirror in vehicles?
6. A lens that is thicker in the middle is a ______ lens.
7. The splitting of white light into colours is called ______.
8. Which lens is used as a magnifying glass?
9. In a plane mirror, your right hand appears as the ______ hand.
10. A spoon’s shiny inside surface acts like a ______ mirror.