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

If you are given a dry piece of land for cultivation, what will you do before sowing the seeds?

State whether the following statement is True or False. Correct the false statement.

Using good quality seed is the only criterion to get high yield

State whether the following statement is True or False. Correct the false statement.

Cells of root nodules of leguminous plants fix nitrogen

During which months do farmers grow mustard in India?

1. Name the tool used with a tractor for sowing seeds in a field.
2. What are the advantages of using this tool?

The gas released during the preparation of bread is ______.

Suggest a suitable word for the following statement.

Nitrogen-fixing microorganism present in the root nodules of legumes

Which is a thermosetting plastic?

The material which is commonly used for making kitchen containers is ______.

Plastic articles are available in all possible shapes and sizes. Can you tell why?

PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Can you write the major difference between these two types of plastics?

A plastic used for making crockery is ______.

Unscramble the jumbled word given below, related to synthetic material.

Laspict

Which of the following non-metals reacts and catches fire on exposure to air?

Iron is more reactive than copper. Can you write an activity to show this?

Which of the following is not a constituent of petroleum?

Petroleum was formed from organisms

You are provided with a mixture of petroleum and water. Can you suggest a method to separate the two?

Name the petroleum product used as fuel for stoves, lamps and jet aircrafts.

Petroleum, ______ and ______ are fossil fuels.