Class 8 Science Student Questions

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Showing: Class 8 / Science (142 questions)

by GIANSH GUPTA KHUNDKER · Class 8

A key to identifying a sound source is that it must be:

Science Sound 0 3 answers 100%
by GIANSH GUPTA KHUNDKER · Class 8

Which part of the human ear vibrates to produce electrical signals to the brain?

Science Sound 0 6 answers 33%
by GIANSH GUPTA KHUNDKER · Class 8

What makes sound travel through a medium?

Science Sound 0 5 answers 60%
by GIANSH GUPTA KHUNDKER · Class 8

What is the minimum distance required for a distinct echo to be heard, assuming the speed of sound is 340m/s?

Science Sound 0 3 answers 67%
by GIANSH GUPTA KHUNDKER · Class 8

If the amplitude of a sound wave is increased, which of the following happens?

Science Sound 0 5 answers 60%
by GIANSH GUPTA KHUNDKER · Class 8

The pitch of a sound depends directly on its:

Science Sound 0 7 answers 86%
by GIANSH GUPTA KHUNDKER · Class 8

In which of the following media does sound travel the fastest?

Science Sound 0 6 answers 50%
by R.LAKSHIT · Class 8

What is the accurate speed of light ?

Science Light 0 5 answers 40%
by GIANSH GUPTA KHUNDKER · Class 8

Which one of the following is caused by bacteria?

Science Microorganisms 0 5 answers 0%
by GIANSH GUPTA KHUNDKER · Class 8

Rajeev is a farmer. He has ploughed the field but needs to level it. Which one of the following can he use to level the field?

Science Crop Production and Management 0 3 answers 67%
by GIANSH GUPTA KHUNDKER · Class 8

.................. is the festival associated with the harvest season.

Science Crop Production and Management 0 7 answers 86%
by GIANSH GUPTA KHUNDKER · Class 8

Which one of the following statements is True about the storage of produce? i. Harvested grains have less moisture. ii. Farmers store grains in jute bags or metallic bins. iii. Small scale storage of grains is done in silos and granaries iv. Specific chemical treatments are required to protect crops from pests and microorganisms.

Science Crop Production and Management 0 5 answers 60%
by GIANSH GUPTA KHUNDKER · Class 8

The instrument ‘combine’ is used for....?

Science Crop Production and Management 0 3 answers 33%
by GIANSH GUPTA KHUNDKER · Class 8

The force of friction on a smooth surface is _____________.

Science Friction 0 5 answers 60%
by GIANSH GUPTA KHUNDKER · Class 8

Lubricants are substances which ________.

Science Friction 0 8 answers 88%
by GIANSH GUPTA KHUNDKER · Class 8

Which one of the following is not a lubricant?

Science Friction 0 8 answers 38%
by GIANSH GUPTA KHUNDKER · Class 8

What is the main aim of "Rethink, Reduce, Reuse, Recycle"?

Science Other 0 5 answers 60%
by GIANSH GUPTA KHUNDKER · Class 8

In which of the following media will the speed of sound be the highest?

Science Sound 0 5 answers 40%
by GIANSH GUPTA KHUNDKER · Class 8

Which of the following is not a natural fiber?

Science Other 0 6 answers 83%
by GIANSH GUPTA KHUNDKER · Class 8

Which of the following organelles is known as the "Powerhouse of the Cell"?

Science Cell 0 5 answers 60%

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