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Free · Class 7 · 8 worksheets · answer keys · practise online · set 21

Science worksheets for Class 7 — with answers

Free CBSE Class 7 science worksheets: nutrition, heat, acids and bases, physical and chemical changes, respiration and transport, motion and time, electric current and its effects, light — with answers.

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Nutrition in plants and animals (Class 7)Heat (Class 7)Acids, bases and salts (Class 7)Physical and chemical changes (Class 7)Respiration and transport (Class 7)Motion and time (Class 7)Electric current and its effects (Class 7)Light (Class 7)

Nutrition in plants and animals

Class 7 · Worksheet 1 · set 21
Name:Date:Score:    / 10

Answer the questions.

  1. Plants like Cuscuta that take food from other plants are called ______.
  2. Which gas is released during photosynthesis?
  3. Which animals chew the cud?
  4. Where is most food absorbed in our body?
  5. Which organ produces bile?
  6. Fungi that feed on dead matter are called ______.
  7. Tiny pores on leaves are called ______.
  8. Name an insectivorous plant.
  9. Name the raw materials for photosynthesis.
  10. Name the longest part of the alimentary canal.

Heat

Class 7 · Worksheet 2 · set 21
Name:Date:Score:    / 10

Answer the questions.

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

Acids, bases and salts

Class 7 · Worksheet 3 · set 21
Name:Date:Score:    / 10

Answer the questions.

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

Physical and chemical changes

Class 7 · Worksheet 4 · set 21
Name:Date:Score:    / 10

Answer the questions.

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

Respiration and transport

Class 7 · Worksheet 5 · set 21
Name:Date:Score:    / 10

Answer the questions.

  1. The kidneys remove waste from blood as ______.
  2. Breaking down food to release energy is called ______.
  3. Blood vessels that carry blood away from the heart are ______.
  4. Yeast respires anaerobically and produces ______.
  5. Respiration without oxygen is called ______ respiration.
  6. Insects breathe through tiny holes called ______.
  7. Blood vessels that carry blood to the heart are ______.
  8. Which tissue carries water in plants?
  9. The red pigment in blood is ______.
  10. How do earthworms breathe?

Motion and time

Class 7 · Worksheet 6 · set 21
Name:Date:Score:    / 10

Answer the questions.

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

Electric current and its effects

Class 7 · Worksheet 7 · set 21
Name:Date:Score:    / 10

Answer the questions.

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

Light

Class 7 · Worksheet 8 · set 21
Name:Date:Score:    / 10

Answer the questions.

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

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Questions

Are these worksheets based on the CBSE syllabus?

Yes — they follow the topics of the NCERT Class 7 science book: nutrition, heat, acids and bases, changes, respiration, transport, motion and time, electric current and light.

Are these worksheets free?

Yes — print them or save as PDF free. Every worksheet has an answer key.

How do I get different questions?

Press “🔄 New set” — the questions change (maths numbers are new every time; English sentences are shuffled).

How do I print only one worksheet?

Press “🖨️ Print” on that worksheet. Tick “with answer key” if you want the answers on a second page.

Can my child do this worksheet online, like a quiz?

Yes — press “▶️ Practise online” on any worksheet. The questions come one at a time with instant marking, a score at the end and a review of mistakes. No sign-in is needed.