Science worksheets for Class 7 — with answers

Answer the questions.

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

Answer the questions.

1. Why do we wear dark clothes in winter?
2. Name two good conductors of heat.
3. A wind blowing from the sea to the land is called a ______.
4. Heat moves through liquids and gases by ______.
5. Name two poor conductors of heat (insulators).
6. Heat moves through solids by ______.
7. Why do woollen clothes keep us warm?
8. How does heat from the Sun reach us?
9. Name the three ways heat travels.
10. The degree of hotness of a body is called its ______.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. Which tissue carries food in plants?
2. Breaking down food to release energy is called ______.
3. How do earthworms breathe?
4. Blood vessels that carry blood away from the heart are ______.
5. Blood vessels that carry blood to the heart are ______.
6. The kidneys remove waste from blood as ______.
7. How many chambers does the human heart have?
8. Insects breathe through tiny holes called ______.
9. Yeast respires anaerobically and produces ______.
10. Loss of water from leaves as vapour is called ______.

Answer the questions.

1. Which instrument shows the speed of a vehicle?
2. Which instrument shows the distance covered by a vehicle?
3. Motion with changing speed is called ______ motion.
4. Speed = ______ ÷ ______
5. Name two ways people measured time in the past.
6. A bus moves at 50 km/h. How long does it take to cover 200 km?
7. A cyclist covers 900 m in 3 minutes. Find the speed in m/min.
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. 1 hour = ______ seconds

Answer the questions.

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

Answer the questions.

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