Science worksheets for Class 7 — with answers

Answer the questions.

1. Which animals chew the cud?
2. Lichens are a partnership of ______ and ______.
3. Which gas is released during photosynthesis?
4. Where does digestion of food begin in humans?
5. Name the longest part of the alimentary canal.
6. Fungi that feed on dead matter are called ______.
7. Tiny pores on leaves are called ______.
8. Name the raw materials for photosynthesis.
9. Where is most food absorbed in our body?
10. Which organ produces bile?

Answer the questions.

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

Answer the questions.

1. Acids taste ______; bases taste ______.
2. What colour does red litmus turn in a base?
3. Name a base used to treat acidity in the stomach.
4. Name a natural indicator.
5. Why do we rub baking soda on an ant bite?
6. Turmeric turns ______ in a base.
7. Name an acid found in curd.
8. Vinegar contains ______ acid.
9. Name an acid found in lemon.
10. Solutions that are neither acidic nor basic are ______.

Answer the questions.

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

Answer the questions.

1. Why do we get muscle cramps after heavy exercise?
2. Loss of water from leaves as vapour is called ______.
3. Blood vessels that carry blood to the heart are ______.
4. The red pigment in blood is ______.
5. Yeast respires anaerobically and produces ______.
6. Insects breathe through tiny holes called ______.
7. Which tissue carries food in plants?
8. Which tissue carries water in plants?
9. Breaking down food to release energy is called ______.
10. The kidneys remove waste from blood as ______.

Answer the questions.

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

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

Answer the questions.

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