What is global warming?
WBBSE
Class X
Physical Science
Concerns about our Environment
02 Mark
2022
Global warming is the gradual increase in Earth’s average surface temperature due to the buildup of greenhouse gases, such as carbon dioxide (CO2) and methane (CH4), in the atmosphere. These gases trap heat from the sun, causing a rise in temperature, which leads to climate changes like melting ice caps, rising sea levels, and more extreme weather patterns.
Related Questions
More WBBSE Easy level questions
1/12
Q.
Name the greenhouse gas discharged from a refrigerator.
A.
CFC / HFC
Q.
Which layer of atmosphere is susceptible to storm and rain?
A.
Troposphere Explanation: Troposphere is the lowest layer nearest to Earth's surface, where...
Q.
Identify the greenhouse gas: (a) Oxygen (b) Hydrogen (c) Water vapour (d) Nitrogen
A.
(c) Water vapour Explanation: Greenhouse gases are gases that trap heat in...
Q.
Write the names of two bio-degradable polymers.
A.
Examples of biodegradable polymers : Polylactic acid (PLA) Polyhydroxybutyrate (PHB)
Q.
Explain the difference between minerals and ores.
A.
Minerals Ores Minerals are naturally occurring substances found in the Earth’s crust....
Q.
Name two copper containing alloys. State one use of each alloy.
A.
Two copper alloys: Copper Alloy Composition Uses Brass Copper (Cu): 60–80% Zinc...
Q.
How can the given conversion be carried out?
A.
The given conversion of ethene (H₂C = CH₂) to ethane (H₃C –...
Q.
What is now used in electrical circuits instead of fuse wire?
A.
MCB / Miniature circuit breaker
Q.
What type of lens is used as a magnifying glass?
A.
Convex lens Explanation: Convex lens forms virtual, erect, magnified image for objects...
Q.
Which metal is used as catalyst in Haber’s process for preparation of ammonia?
A.
The metal used as a catalyst in the Haber’s process for the...
Q.
Which gas is produced at the cathode during electrolysis of acidified water?
A.
Hydrogen. Explanation: In electrolysis of acidified water with Pt electrodes, H⁺ ions...
Q.
State True or False: Electrolysis always involves the process of oxidation-reduction.
A.
True. Explanation: Electrolysis drives chemical reactions using electrical energy, involving oxidation at...