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Read the given statements regarding types of rock.
(i) P is used by dentists for polishing teeth.
(ii) Q is rich in mineral calcium carbonate and is used for making cement.
(iii) R is used for making statues and floorings.
Select the option which correctly identifies the category of rocks to which P, Q and R belongs.

A teacher needs to show to her students that soil contains air. Which of the following should she do?

APour some water into a beaker containing soil
BHeat some soil in a pan over stove
CObserve the soil under a microscope
DAll of these

________ is an oil giving plant.

A
B
C
DAll of these

Manuj, who is going to Kashmir for his vacations in December should preferably pack _______ in his bag.

A
B
C
D

I am round and green. You eat me as a vegetable.
I carry a baby plant inside me.
Starting from the first letter cross out every alternate letter in the following options and select the one which gives my name.

AACGHLIPLOLSI
BAPFEOA
CSLTASDTYUFRIPNRGEEMR
DPSJPEIFNSATCUH

Nidhi plotted a graph to show the amount of sound produced during the following activities P, Q and R. Which of the following graphs would she have obtained?



A
B
C
D

Direction: Refer to the given figure of plant in which some parts are labelled and answer the question.

Which of the following plant parts take part in absorption of water and minerals, and exchange of gases respectively?

AP and R
BQ and S
CT and R
DT and P

Unscramble the given names of internal body organs and select the correct match of organ with its function.

At a certain time of the day, the temperature over land is 21°C while the temperature over sea is 36°C. At this time ________.

AThe air pressure is lower over land than that over sea
BBreeze will flow from land towards the sea
CBreeze will flow from sea towards the land
DNone of these

Global warming leads to a rise in the sea level causing floods in the coastal areas. One of the main reasons of global warming is

A Combustion of fuels releases sulphur dioxide which increases the temperature
B Combustion of fuels releases carbon monoxide which decreases the temperature
C Combustion of fuels releases unburnt carbon particles which causes decrease in temperature
D Combustion of fuels releases carbon dioxide which causes increase in temperature.