1. Which of the following phenomenon is considered
responsible for Global Warming?
A.Greenhouse effect
B.Fire in coal mines
C.Dry farming
D.Monsoon
E.Trade winds
Answer: Option A
Solution:
Modern global warming is the result of an increase in magnitude of the so-called greenhouse effect, a
warming of Earth's surface and lower atmosphere caused by the presence of water vapour, carbon
dioxide, methane, nitrous oxides, and other greenhouse gases.
2. The nucleus of an atom consists of
A.electrons and neutrons
B.electrons and protons
C.protons and neutrons
D.All of the above
Answer: Option C
Solution:
The nucleus of an atom consists of protons and neutrons.
