Secondary School (English Medium) (5 to 8) Class 7 - CBSE Question Bank Solutions

A wholesale woollen fibre dealer gets the woollen fibre of different textures sorted for various purposes. Match the items in Column I with the woollen fibre in Column II.

Paheli and Boojho measured their body temperature. Paheli found her’s to be 98.6°F and Boojho recorded 37°C. Which of the following statement is true?

Figure (a–d) shows the readings on four different thermometers. Indicate which of the reading shows the normal human body temperature?

For setting curd, a small amount of curd is added to warm milk. The microbes present in the curd help in setting if the temperature of the mixture remains approximately between 35°C to 40°C. At places, where room temperature remains much below the range, setting of curd becomes difficult. Suggest a way to set curd in such a situation.

State whether the following statement is true or false. Correct the false statement.

Phenolphthalein is a natural indicator.

Turmeric and litmus are ______ acid-base indicators.

Give an example of a chemical reaction for the following situation:

A gas is evolved

If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.

Give two other examples of a similar type of change.

Which of the following statement is incorrect for penguins?

Figure shows a diagrammatic representation of trees in the afternoon along a sea coast. State on which side is the sea; A or B? Give reasons for your choice.

When strong/high-speed wind blows, an umbrella held upright at times gets upturned. Explain the reason.

Availability of water and minerals in the soil for maximum absorption by roots is in the –

Soil has particles of different sizes. Arrange the words given below in increasing order of their particle size.

Boojho walks to his school which is at a distance of 3 km from his home in 30 minutes. On reaching he finds that the school is closed and comes back by a bicycle with his friend and reaches home in 20 minutes. His average speed in km/h is ______.

A combination of two or more cells is called a ______.

Unscramble the following words:

HICWTS

Draw the symbols of the following circuit components.

Electric cell

Suppose we wish to obtain the real image of a distant tree. Explain two possible ways in which we can do it.

Which of the following are not the liquid forms of water?

1. Snow
2. Lake water
3. River water
4. Water vapour
5. Ice

Choose the correct combination from the options below.

Water cycle does not involve which of the following?