Science worksheets for Class 7 — with answers

Answer the questions.

1. Name an insectivorous plant.
2. The process by which green plants make food is called ______.
3. Which gas is released during photosynthesis?
4. Tiny pores on leaves are called ______.
5. Plants like Cuscuta that take food from other plants are called ______.
6. Which animals chew the cud?
7. Which organ produces bile?
8. Fungi that feed on dead matter are called ______.
9. Name the raw materials for photosynthesis.
10. Where is most food absorbed in our body?

Answer the questions.

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

Answer the questions.

1. Name a base used to treat acidity in the stomach.
2. Name an acid found in lemon.
3. Why do we rub baking soda on an ant bite?
4. What is formed when an acid reacts with a base?
5. The reaction of an acid with a base is called ______.
6. Name a natural indicator.
7. Acids taste ______; bases taste ______.
8. Turmeric turns ______ in a base.
9. Name an acid found in curd.
10. Vinegar contains ______ acid.

Answer the questions.

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

Answer the questions.

1. Why do we get muscle cramps after heavy exercise?
2. Respiration without oxygen is called ______ respiration.
3. Yeast respires anaerobically and produces ______.
4. Which tissue carries food in plants?
5. Blood vessels that carry blood away from the heart are ______.
6. Which tissue carries water in plants?
7. Breaking down food to release energy is called ______.
8. How many chambers does the human heart have?
9. Insects breathe through tiny holes called ______.
10. The kidneys remove waste from blood as ______.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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