Science worksheets for Class 7 — with answers

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. Which modern switch replaces the fuse?
2. A safety device that melts when too much current flows is a ______.
3. The heating effect of current is used in ______.
4. Two or more cells joined together make a ______.
5. Who showed that current makes a compass needle move?
6. Which effect of current makes an electric bell ring?
7. The wire in a heater is made of ______.
8. Name one use of an electromagnet.
9. A coil of wire that becomes a magnet when current flows is an ______.
10. Draw (or name) the symbol of an electric cell.

Answer the questions.

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