|
What is a Newton’s disc?
|
|
0
|
1042
|
March 23, 2018
|
|
State the characteristics of the image formed by a plane mirror
|
|
0
|
954
|
March 23, 2018
|
|
What is lateral inversion?
|
|
0
|
5134
|
March 23, 2018
|
|
Give one use each of a concave and a convex mirror
|
|
0
|
4629
|
March 23, 2018
|
|
State two differences between a convex and a concave lens
|
|
0
|
8529
|
March 23, 2018
|
|
What is a virtual image? Give one situation where a virtual image is formed
|
|
0
|
1835
|
March 23, 2018
|
|
A shopkeeper wanted to fix a mirror which will give a maximum view of his shop
|
|
0
|
2239
|
March 23, 2018
|
|
Two different type of lenses are placed on a sheet of newspaper
|
|
0
|
2854
|
March 23, 2018
|
|
An erect and enlarged image of an object is formed on a screen. Explain how this could be possible. [NCERT Exemplar] The image formed on the screen could be enlarged and erect if the object is placed upside down between F and 2F of the lens
|
|
0
|
636
|
March 23, 2018
|
|
State the correct sequence (1-7) of colours in the spectrum formed by the prisms A and B, shown in figure
|
|
0
|
2182
|
March 23, 2018
|
|
Boojho made light from a laser torch to fall on a prism. Will he be able to observe a band of seven colours? Explain with a reason
|
|
0
|
1831
|
March 23, 2018
|
|
Observe the figures given below carefully
|
|
0
|
1223
|
March 23, 2018
|
|
What type of mirror is used as a side mirror in a scooter?
|
|
0
|
983
|
March 23, 2018
|
|
Give reasons for the following. Drip irrigation helps in conserving water
|
|
0
|
1396
|
March 23, 2018
|
|
Explain the factors responsible for the depletion of water table
|
|
0
|
2497
|
March 23, 2018
|
|
Make a sketch showing groundwater and water table. Label it
|
|
0
|
2668
|
March 23, 2018
|
|
Write four ways of water management
|
|
0
|
615
|
March 23, 2018
|
|
What is drip irrigation?
|
|
0
|
7304
|
March 23, 2018
|
|
Write the scientific terms for the following
|
|
0
|
823
|
March 23, 2018
|
|
What factors are responsible for the uneven distribution of water over the globe?
|
|
0
|
3693
|
March 23, 2018
|
|
Water is very precious for all the living beings. What will happen in future if we do not save water now?
|
|
0
|
5525
|
March 23, 2018
|
|
Write three ways by which we can conserve water
|
|
0
|
560
|
March 23, 2018
|
|
What is groundwater? What are the sources of water which are fed by groundwater?
|
|
0
|
1164
|
March 23, 2018
|
|
You have been asked to maintain a garden. How will you minimise the use of water?
|
|
0
|
1863
|
March 23, 2018
|
|
There are ten tubewells in a lane of fifty houses
|
|
0
|
812
|
March 23, 2018
|
|
Explain how groundwater is recharged
|
|
0
|
778
|
March 23, 2018
|
|
From where do the following usually get water?
|
|
0
|
600
|
March 23, 2018
|
|
Complete the given table:
|
|
0
|
714
|
March 23, 2018
|
|
How can you observe the three forms of water in (a) nature and (b) at home?
|
|
0
|
1554
|
March 23, 2018
|
|
Explain the role of forest in maintaining the balance between oxygen and carbon dioxide in the atmosphere
|
|
0
|
16951
|
March 23, 2018
|