Science worksheets for Class 7 — with answers

Answer the questions.

1. Name the raw materials for photosynthesis.
2. Where is most food absorbed in our body?
3. Which animals chew the cud?
4. The process by which green plants make food is called ______.
5. Which gas is released during photosynthesis?
6. Lichens are a partnership of ______ and ______.
7. Name the longest part of the alimentary canal.
8. Where does digestion of food begin in humans?
9. Fungi that feed on dead matter are called ______.
10. Which organ produces bile?

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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