What is a seismograph?

Important Questions on Some Natural Phenomena

EASY

8th CBSE

IMPORTANT

Focus Science in Everyday Life>Chapter 16 - Some Natural Phenomena>Exercise>Q 1

Name the charge on a glass rod rubbed with silk.

HARD

8th CBSE

IMPORTANT

Focus Science in Everyday Life>Chapter 16 - Some Natural Phenomena>Exercise>Q 1

What is an electroscope? Draw a diagram to describe it's construction. 

MEDIUM

8th CBSE

IMPORTANT

Focus Science in Everyday Life>Chapter 16 - Some Natural Phenomena>Exercise>Q 2

Which natural phenomenon causes both light and sound? What is the possible cause of this phenomenon?

MEDIUM

8th CBSE

IMPORTANT

Focus Science in Everyday Life>Chapter 16 - Some Natural Phenomena>Exercise>Q 3

List five safety measures one must take during lightning.

MEDIUM

8th CBSE

IMPORTANT

Focus Science in Everyday Life>Chapter 16 - Some Natural Phenomena>Exercise>Q 4

What causes an earthquake? Explain.

MEDIUM

8th CBSE

IMPORTANT

Focus Science in Everyday Life>Chapter 16 - Some Natural Phenomena>Exercise>Q 5

What is a Richter scale? How do we classify earthquakes based on magnitude?

MEDIUM

8th CBSE

IMPORTANT

Focus Science in Everyday Life>Chapter 16 - Some Natural Phenomena>Train your Brain>Q 1

During a thunderstorm, lightning is seen first while sound is heard later. Explain.

MEDIUM

8th CBSE

IMPORTANT

Focus Science in Everyday Life>Chapter 16 - Some Natural Phenomena>Train your Brain>Q 2

Why the areas of seismic zones considered highly earthquake prone areas?