Science worksheets for Class 7 — with answers

Answer the questions.

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

Answer the questions.

1. Heat moves through liquids and gases by ______.
2. Heat moves through solids by ______.
3. The normal temperature of the human body is ______.
4. The degree of hotness of a body is called its ______.
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. Why does a clinical thermometer have a kink?
9. Name the three ways heat travels.
10. Why do we wear dark clothes in winter?

Answer the questions.

1. Name a base used to treat acidity in the stomach.
2. Name an acid found in lemon.
3. Turmeric turns ______ in a base.
4. What colour does blue litmus turn in an acid?
5. What colour does red litmus turn in a base?
6. What is formed when an acid reacts with a base?
7. Vinegar contains ______ acid.
8. Acids taste ______; bases taste ______.
9. Solutions that are neither acidic nor basic are ______.
10. The reaction of an acid with a base is called ______.

Answer the questions.

1. Is tearing 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 burning of paper a physical or a chemical change?
6. Is dissolving sugar in water a physical or a chemical change?
7. Is rusting of iron 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. Which tissue carries food in plants?
2. Insects breathe through tiny holes called ______.
3. Breaking down food to release energy is called ______.
4. Blood vessels that carry blood to the heart are ______.
5. Blood vessels that carry blood away from the heart are ______.
6. The kidneys remove waste from blood as ______.
7. Loss of water from leaves as vapour is called ______.
8. Yeast respires anaerobically and produces ______.
9. Which tissue carries water in plants?
10. Respiration without oxygen is called ______ respiration.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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