Science worksheets for Class 7 — with answers

Answer the questions.

1. Fungi that feed on dead matter are called ______.
2. Name the raw materials for photosynthesis.
3. Name an insectivorous plant.
4. Where does digestion of food begin in humans?
5. Which animals chew the cud?
6. Tiny pores on leaves are called ______.
7. Name the longest part of the alimentary canal.
8. Plants like Cuscuta that take food from other plants are called ______.
9. Which gas is released during photosynthesis?
10. Where is most food absorbed in our body?

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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