XB Science Quiz

Carbon occurs in the elemental form as __________ and __________.

• carbon dioxide, graphite

• diamond, granite

• graphite, diamond

• carbon dioxide, carbon monoxide

The carbon cycle begins with the process of __________ in plants.

• respiration

• photosynthesis

• transpiration

• ascent of sap

Presence of __________ makes earth the most habitable planet.

• oxygen

• sun

• water

• atmosphere

Which international treaty signed by various countries helps to keep global warming in check?

• Kioto Protocol

• Koyto Protocol

• Kyoto Protocol

• Kyato protocol

What are endoskeletons and exoskeletons made out of?

• carbonate salts

• carbon

• nitride salts

• graphene

Which of the following are greenhouse gases?

(i) CH4

(ii) O2

(iii) Water Vapour

(iv) CO2

• i and iv

• i, ii and iv

• ii and iii

• i, iii and iv

Which of the following is NOT an effect of global warming?

• Stronger storms

• More snow and ice

• More wildfires

• None of these

Which of the following methods can help prevent global warming?

• Afforestation

• Increasing fuel efficiency of vehicles

• Optimum usage of renewable energy

• All of these

The most potent greenhouse gas in terms of efficiency is?

• CFC

• CH4

• CO2

• C20

The ozone layer is present in which layer of the atmosphere?

• Thermosphere

• Mesosphere

• Troposphere

• Stratosphere