Science worksheets for Class 7 — with answers

Answer the questions.

1. Lichens are a partnership of ______ and ______.
2. Which organ produces bile?
3. Where is most food absorbed in our body?
4. Which gas is released during photosynthesis?
5. Fungi that feed on dead matter are called ______.
6. Name the raw materials for photosynthesis.
7. Plants like Cuscuta that take food from other plants are called ______.
8. How does an amoeba take in food?
9. Which animals chew the cud?
10. Name an insectivorous plant.

Answer the questions.

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

Answer the questions.

1. Turmeric turns ______ in a base.
2. What colour does blue litmus turn in an acid?
3. Name an acid found in curd.
4. The reaction of an acid with a base is called ______.
5. Vinegar contains ______ acid.
6. What is formed when an acid reacts with a base?
7. What colour does red litmus turn in a base?
8. Name an acid found in lemon.
9. Why do we rub baking soda on an ant bite?
10. Acids taste ______; bases taste ______.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. Name two ways people measured time in the past.
2. Which instrument shows the distance covered by a vehicle?
3. Motion with changing speed is called ______ motion.
4. What is the SI unit of speed?
5. A car covers 120 km in 2 hours. Find its speed.
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. A cyclist covers 900 m in 3 minutes. Find the speed in m/min.
9. Speed = ______ ÷ ______
10. 1 hour = ______ seconds

Answer the questions.

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

Answer the questions.

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