Science worksheets for Class 7 — with answers

Answer the questions.

1. Where is most food absorbed in our body?
2. Plants like Cuscuta that take food from other plants are called ______.
3. Name an insectivorous plant.
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. Lichens are a partnership of ______ and ______.
8. Tiny pores on leaves are called ______.
9. Name the longest part of the alimentary canal.
10. Which organ produces bile?

Answer the questions.

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

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 a natural indicator.
4. Name an acid found in curd.
5. What colour does red litmus turn in a base?
6. Vinegar contains ______ acid.
7. Why do we rub baking soda on an ant bite?
8. Name a base used to treat acidity in the stomach.
9. What colour does blue litmus turn in an acid?
10. Turmeric turns ______ in a base.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. Name two ways people measured time in the past.
2. Speed = ______ ÷ ______
3. A train moves at 80 km/h for 3 hours. How far does it go?
4. Which instrument shows the distance covered by a vehicle?
5. Which instrument shows the speed of a vehicle?
6. Motion with changing speed is called ______ motion.
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 bus moves at 50 km/h. How long does it take to cover 200 km?
10. The time taken by a pendulum for one oscillation is its ______.

Answer the questions.

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

Answer the questions.

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