Rupali classified a few changes occurring around us as shown in the table.
Which of her observations are incorrect?
A 1 and 2 only
B 2 and 3 only
C 1, 4 and 5 only
D All of these.
How is formation of clouds reversible?ð¤
The object starts from O having a straight line motion along the path OPQRS is represented by the distance-time graph shown in figure. Match the given statements to the different parts of the graph correctly.
(i) Object is moving with maximum speed.
(ii) Object starts moving in reversed direction.
(iii) Object is at rest.
(iv) Average velocity of object is zero.
answer is d
A list of various actions is given below.
(i) Terrace farming
(iii) Making dams
(iv) Setting up new residential areas
(v) Volcanic eruption
(vi) Coal mining
Which of these actions do not lead to global warming?
A(i) and (ii) only
C(ii), (iii), (iv) and (vi) only
D(iii), (iv) and (v) only
why not making dams
In the given options, a boy is looking through a material. Which one of the following represents a translucent material?
D None of these
______ is a factor causing noise pollution.
A A whispering boy
B A crying baby
C A drilling machine at a construction site
D A moving toy car
Generally, a solid first changes into a liquid and then into a gas on heating but some solids directly change into gas. This process is called ________.
Study the given diagram classifying three kinds of animals X, Y and Z and select the correct option regarding them.
A Ant, termite and flea are examples of Z.
B Frog, butterfly and mosquito are examples of Y.
C Penguin and ostrich are examples of X.
D Both (A) and (C)
Two identical metal balls A and B moving in opposite directions with different speeds hit each other at point X as shown in the figure. Changes will most likely appear in their
A 1 and 3
B 2 and 3
C 2 and 4
D 1, 2 and 3