Science worksheets for Class 7 — with answers

Answer the questions.

1. Fungi that feed on dead matter are called ______.
2. Name an insectivorous plant.
3. Which organ produces bile?
4. Plants like Cuscuta that take food from other plants are called ______.
5. Which gas is released during photosynthesis?
6. Name the raw materials for photosynthesis.
7. Lichens are a partnership of ______ and ______.
8. The process by which green plants make food is called ______.
9. Where does digestion of food begin in humans?
10. How does an amoeba take in food?

Answer the questions.

1. Why does a clinical thermometer have a kink?
2. How does heat from the Sun reach us?
3. Why do we wear dark clothes in winter?
4. Name two poor conductors of heat (insulators).
5. The normal temperature of the human body is ______.
6. Name two good conductors of heat.
7. Why do we wear light-coloured clothes in summer?
8. Heat moves through liquids and gases by ______.
9. Why do woollen clothes keep us warm?
10. Heat moves through solids by ______.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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