Study the given diagram carefully. Activities occurring at which place could cause water pollution and acid rain respectively?
--------Water pollution------Acid Rain
AP and Q------------------S and U
BS and U------------------Q, R and T
CQ and R------------------S and T
DS and R------------------P, Q and U
Some animals are grouped according to their similarities in the given classification chart. Which option gives the correct information for characters P, Q, R and S respectively?
Which of the following graphs shows the relationship between the number of deaths of organisms in a canal and the amount of refuse in it?
Harshit wanted to find out among the four locations - playground, science laboratory, school garden and the bus stop outside his school - which is the most polluted. He placed four glass tiles smeared with petroleum jelly at the four locations for the same period of time for one day and recorded his observation. However, his teacher told him that his experiment was not reliable because he did not ________.
AWet the glass tiles
BUse tiles made of different materials
CRepeat the experiment over a few days
DExamine the tiles with hand lens
The given diagram shows a nutcracker. Identify the labels d, e and f and select the option that correctly identifies the components denoted by these labels in other simple machines.
Ad - The bend that joins two arms of a tong
Bf - The screw that fixes the two parts of a scissor together
Ce - The elbow of our hand
Df - The front clawed end of a bottle opener
The given map shows some of the world’s volcanoes. Which conclusion can be drawn from the map?
A Volcanoes occur on only one continent.
B Volcanoes are affected by climate.
C Volcanoes are concentrated in certain areas.
D Volcano belt occurs across a huge land mass on Earth.
Refer to the given figure and select the correct statement.
A When muscles P and Q relax, arm moves down.
B When muscles P and Q contract, arm moves up.
C When muscle P contracts and muscle Q relaxes, the arm moves up.
D When muscle P relaxes and muscle Q contracts, the arm moves up.
Five objects a, b, c, d and e, of the same volume but different masses, are put into a tank of water as shown here.
Which of the following is most likely to be the mass of object d?
A 35 g
B 48 g
C 64 g
D 80 g
THE CORRECT ANSWER IS C BECAUSE IT MUST BE MORE THAN 52 g AND LESS THAN 75 g.
Refer to the given figure. The rock X can be ________.
ANSWER IS B