Science worksheets for Class 7 — with answers

Answer the questions.

1. How does an amoeba take in food?
2. Name the longest part of the alimentary canal.
3. Name the raw materials for photosynthesis.
4. Which organ produces bile?
5. Fungi that feed on dead matter are called ______.
6. The process by which green plants make food is called ______.
7. Plants like Cuscuta that take food from other plants are called ______.
8. Tiny pores on leaves are called ______.
9. Where does digestion of food begin in humans?
10. Which gas is released during photosynthesis?

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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