Science worksheets for Class 7 — with answers

Answer the questions.

1. Name the raw materials for photosynthesis.
2. Lichens are a partnership of ______ and ______.
3. Fungi that feed on dead matter are called ______.
4. Where is most food absorbed in our body?
5. Where does digestion of food begin in humans?
6. Name the longest part of the alimentary canal.
7. Name an insectivorous plant.
8. The process by which green plants make food is called ______.
9. Which organ produces bile?
10. How does an amoeba take in food?

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. A change in which a new substance is formed is a ______ change.
2. What gas is formed when vinegar reacts with baking soda?
3. Is cooking food a physical or a chemical change?
4. Is dissolving sugar in water a physical or a chemical change?
5. Name one way to prevent rusting.
6. Getting large crystals of a substance from its solution 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. Is melting of ice a physical or a chemical change?
10. What two things are needed for iron to rust?

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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