Science worksheets for Class 7 — with answers

Answer the questions.

1. Which animals chew the cud?
2. Name an insectivorous plant.
3. Name the longest part of the alimentary canal.
4. Which gas is released during photosynthesis?
5. Which organ produces bile?
6. Lichens are a partnership of ______ and ______.
7. How does an amoeba take in food?
8. Tiny pores on leaves are called ______.
9. Plants like Cuscuta that take food from other plants are called ______.
10. Where does digestion of food begin in humans?

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. The splitting of white light into colours is called ______.
2. Which lens is used as a magnifying glass?
3. Which mirror is used as the rear-view mirror in vehicles?
4. A lens that is thinner in the middle is a ______ lens.
5. Name a natural example of white light splitting into colours.
6. White light is made of ______ colours.
7. Which mirror do dentists use?
8. The image in a plane mirror is ______ and the same size.
9. Name the device that splits white light into seven colours.
10. The angle of incidence is ______ to the angle of reflection.