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. Which organ produces bile?
4. Tiny pores on leaves are called ______.
5. Which gas is released during photosynthesis?
6. Name the raw materials for photosynthesis.
7. Plants like Cuscuta that take food from other plants are called ______.
8. Where is most food absorbed in our body?
9. Which animals chew the cud?
10. Lichens are a partnership of ______ and ______.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. The red pigment in blood is ______.
2. Insects breathe through tiny holes called ______.
3. The kidneys remove waste from blood as ______.
4. Which tissue carries food in plants?
5. How many chambers does the human heart have?
6. Breaking down food to release energy is called ______.
7. Why do we get muscle cramps after heavy exercise?
8. Blood vessels that carry blood away from the heart are ______.
9. How do earthworms breathe?
10. Blood vessels that carry blood to the heart are ______.

Answer the questions.

1. Which instrument shows the distance covered by a vehicle?
2. Speed = ______ ÷ ______
3. A cyclist covers 900 m in 3 minutes. Find the speed in m/min.
4. A car covers 120 km in 2 hours. Find its speed.
5. 1 hour = ______ seconds
6. Which instrument shows the speed of a vehicle?
7. A train moves at 80 km/h for 3 hours. How far does it go?
8. What is the SI unit of speed?
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. Which effect of current makes an electric bell ring?
2. Which modern switch replaces the fuse?
3. Who showed that current makes a compass needle move?
4. Two or more cells joined together make a ______.
5. The wire in a heater is made of ______.
6. The heating effect of current is used in ______.
7. A coil of wire that becomes a magnet when current flows is an ______.
8. Draw (or name) the symbol of an electric cell.
9. Name one use of an electromagnet.
10. A safety device that melts when too much current flows is a ______.

Answer the questions.

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