Science worksheets for Class 7 — with answers

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. Which instrument shows the distance covered by a vehicle?
2. The time taken by a pendulum for one oscillation is its ______.
3. What is the SI unit of speed?
4. A train moves at 80 km/h for 3 hours. How far does it go?
5. A bus moves at 50 km/h. How long does it take to cover 200 km?
6. 1 hour = ______ seconds
7. A cyclist covers 900 m in 3 minutes. Find the speed in m/min.
8. Speed = ______ ÷ ______
9. A car covers 120 km in 2 hours. Find its speed.
10. Which instrument shows the speed of a vehicle?

Answer the questions.

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

Answer the questions.

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