ICSE ICSE Class 7 - CISCE Question Bank Solutions

“Poles exist in pair”. Comment on this statement ?

Define time period.

Write the audible range of frequency for the normal human ear.

What are ultrasonics? Can you hear the ultrasonic sound?

What are infrasonics? Can you hear them?

How does a bat make use of ultrasonics waves to find its way?

What is a magnetic compass ? State its use.

Name the two characteristics of sound which differentiate two sounds from each other.

Explain the meaning of the term magnetic field ?

On what factor does the loudness of a sound depend ?

How does the loudness of sound produced depend on the vibrating area of the body ?

State the factors on which the pitch of a sound depends.

Differentiate between a high pitch sound and a low pitch sound.

How does a man’s voice differ from a woman’s voice ?

Name the characteristic which differentiates two sounds of the same pitch and same loudness.

You recognize your friend by hearing his voice on a telephone. Explain.

A musician recognizes the musical instrument by hearing the sound produced by it, even without seeing the instrument. Which characteristic of sound makes this possible ?

What is declination ? Draw a diagram to show the angle between the declination and true direction of geographic north.

Describe an experiment to show the production of sound having low and high pitch.

Name four appliances which work using electricity ?