Science worksheets for Class 7 — with answers

Answer the questions.

1. The process by which green plants make food is called ______.
2. Lichens are a partnership of ______ and ______.
3. Name the raw materials for photosynthesis.
4. Where is most food absorbed in our body?
5. Which animals chew the cud?
6. Name the longest part of the alimentary canal.
7. Plants like Cuscuta that take food from other plants are called ______.
8. Name an insectivorous plant.
9. Tiny pores on leaves are called ______.
10. Which organ produces bile?

Answer the questions.

1. Heat moves through solids by ______.
2. Why do woollen clothes keep us warm?
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. Name two good conductors of heat.
7. Name the three ways heat travels.
8. The degree of hotness of a body is called its ______.
9. Why does a clinical thermometer have a kink?
10. Why do we wear dark clothes in winter?

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. Blood vessels that carry blood away from the heart are ______.
2. Yeast respires anaerobically and produces ______.
3. Loss of water from leaves as vapour is called ______.
4. Breaking down food to release energy is called ______.
5. How many chambers does the human heart have?
6. How do earthworms breathe?
7. The red pigment in blood is ______.
8. Why do we get muscle cramps after heavy exercise?
9. Respiration without oxygen is called ______ respiration.
10. The kidneys remove waste from blood as ______.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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