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

Plastic is used for making a large variety of articles of daily use and these articles are very attractive. But it is advised to avoid the use of plastic as far as possible. Why?

Select the articles from the following list which are biodegradable.

1. paper
2. woolen clothes
3. wood
4. aluminium can
5. plastic bag
6. peels of vegetables

Indicate whether the following statement is True or False. Also write the false statement in their correct form.

Most of the plastics are biodegradable

Despite being very useful, it is advised to restrict the use of plastic. Why is it so? Can you suggest some methods to limit its consumption?

Generally metallic oxides are basic and non-metallic oxides are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red?

Which non-metal is used to disinfect water?

A purple coloured non-metal forms a brown solution in alcohol which is applied on wounds as an antiseptic. Name the non-metal.

The movement of the earth’s plates causes

Which of the following is not likely to cause Tsunami?

The earth’s plate responsible for causing earthquakes is ______.

The outermost layer of earth is called

Major earthquakes are less likely to occur in

Consider the list of terms given below:

1. Tsunami
2. Landslides
3. Floods
4. Lightning

Earthquakes can cause

State whether the following statement is True or False.

Earthquakes occur all the time all over the world. 

State whether the following statement is True or False.

The plates of the outermost layer of the earth are always in continuous motion.

State whether the following statement is True or False.

Tremors on the earth can also be caused by the eruption of a volcano.

State whether the following statement is True or False.

The process of electric discharge cannot occur between clouds and the earth.

Is it possible to predict the occurrence of an earthquake?

What is irrigation?

Categorize the materials of the following products into ‘can be recycled’ and ‘cannot be recycled’.

Telephone instruments, plastic toys, cooker handles, carry bags, ball point pens, plastic bowls, plastic covering on electrical wires, plastic chairs, electrical switches.