Science worksheets for Class 7 — with answers

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. The red pigment in blood is ______.
2. How many chambers does the human heart have?
3. Which tissue carries food in plants?
4. The kidneys remove waste from blood as ______.
5. Why do we get muscle cramps after heavy exercise?
6. Yeast respires anaerobically and produces ______.
7. Which tissue carries water in plants?
8. Breaking down food to release energy is called ______.
9. Blood vessels that carry blood away from the heart are ______.
10. How do earthworms breathe?

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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