Science worksheets for Class 7 — with answers

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. A cyclist covers 900 m in 3 minutes. Find the speed in m/min.
2. Name two ways people measured time in the past.
3. What is the SI unit of speed?
4. Which instrument shows the speed of a vehicle?
5. Speed = ______ ÷ ______
6. Motion with changing speed is called ______ motion.
7. 1 hour = ______ seconds
8. A car covers 120 km in 2 hours. Find its speed.
9. Which instrument shows the distance covered by a vehicle?
10. A bus moves at 50 km/h. How long does it take to cover 200 km?

Answer the questions.

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

Answer the questions.

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