Daily Practice Problems
Class 7 Science
daily practice problem

­Question 1.

Light travels in a ____________.

(a) straight line

(b) circular track

(c) rectangular path

(d)parabolic path


Question 2.

The surface of water can act like a ___________.

(a) plate

(b) paper

(c) mirror

(d) cloth


Question 3.

An image formed by a plane mirror is of __________.

(a) bigger size than the object.

(b) same size as of the object.

(c) smaller size than the object.

(d) none of the above.


Question 4.

The curved shining surface of a spoon acts as __________.

(a) mirror

(b) lens

(c) spoon

(d) rubber


Question 5.

The most common example of a curved mirror is a ____________ mirror.

(a) conical

(b) circular

(c) spherical

(d) rectangular


Question 6.

Give definitions for convex and concave mirrors.


Question 7.

An image formed on a screen is called ___________.

(a) virtual image.

(b) real image.

(c) inverted image.

(d) erect image.


Question 8.

An image cannot be formed on a screen is called _____________.

(a) erect image.

(b) inverted image.

(c) real image.

(d) virtual image.


Question 9.

Give two uses of concave mirrors.


Question 10.

Give two uses of convex mirrors.


Question 11.

Define convex lens.


Question 12.

Give definition of concave lens.


Question 13.

It is _________ to look through a lens at the Sun or a bright light.

(a) safe

(b) beautiful

(c) dangerous

(d) good


Question 14.

__________ lens is also known as converging lens.

(a) concave

(b) convex

(c) plane

(d) normal


Question 15.

What is the other name of concave lens?


Question 16.

Give properties for the image formed by a plane mirror.


Question 17.

Which type of images can be formed by a concave mirror?


Question 18.

Name the colours present in a white light.


Question 19.

Give properties of image formed by a convex mirror.


Question 20.

Which type of images formed by convex and concave lenses?