Science worksheets for Class 7 — with answers

Answer the questions.

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

Answer the questions.

1. Heat moves through solids by ______.
2. Name two good conductors of heat.
3. Why do we wear dark clothes in winter?
4. Name the three ways heat travels.
5. The degree of hotness of a body is called its ______.
6. Why do woollen clothes keep us warm?
7. Why do we wear light-coloured clothes in summer?
8. Name two poor conductors of heat (insulators).
9. How does heat from the Sun reach us?
10. A wind blowing from the sea to the land is called a ______.

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

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

Answer the questions.

1. A lens that is thinner in the middle is a ______ lens.
2. Name the device that splits white light into seven colours.
3. Which mirror is used as the rear-view mirror in vehicles?
4. White light is made of ______ colours.
5. The image in a plane mirror is ______ and the same size.
6. Which lens is used as a magnifying glass?
7. A lens that is thicker in the middle is a ______ lens.
8. The splitting of white light into colours is called ______.
9. Name a natural example of white light splitting into colours.
10. Which mirror do dentists use?