Science worksheets for Class 7 — with answers

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

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. How many chambers does the human heart have?
4. How do earthworms breathe?
5. Respiration without oxygen is called ______ respiration.
6. Yeast respires anaerobically and produces ______.
7. The red pigment in blood is ______.
8. Which tissue carries food in plants?
9. Which tissue carries water in plants?
10. Insects breathe through tiny holes called ______.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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