Science worksheets for Class 7 — with answers

Answer the questions.

1. How does an amoeba take in food?
2. The process by which green plants make food is called ______.
3. Lichens are a partnership of ______ and ______.
4. Name the raw materials for photosynthesis.
5. Plants like Cuscuta that take food from other plants are called ______.
6. Name the longest part of the alimentary canal.
7. Which animals chew the cud?
8. Which organ produces bile?
9. Which gas is released during photosynthesis?
10. Where does digestion of food begin in humans?

Answer the questions.

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

Answer the questions.

1. Name a base used to treat acidity in the stomach.
2. What colour does red litmus turn in a base?
3. Name a natural indicator.
4. Name an acid found in lemon.
5. Acids taste ______; bases taste ______.
6. What is formed when an acid reacts with a base?
7. Turmeric turns ______ in a base.
8. Solutions that are neither acidic nor basic are ______.
9. The reaction of an acid with a base is called ______.
10. Vinegar contains ______ acid.

Answer the questions.

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

Answer the questions.

1. The red pigment in blood is ______.
2. Loss of water from leaves as vapour is called ______.
3. Yeast respires anaerobically and produces ______.
4. Blood vessels that carry blood away from the heart are ______.
5. How do earthworms breathe?
6. Insects breathe through tiny holes called ______.
7. How many chambers does the human heart have?
8. Respiration without oxygen is called ______ respiration.
9. Which tissue carries water in plants?
10. Which tissue carries food in plants?

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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