Download App

Natural Resources — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceNatural Resources1 Mark
Question

Greenhouse effect is caused by:

  1. Green plants.
  2. Infrared rays.
  3. UV-rays.
  4. X-rays.
✓

Answer

  1. Infrared rays.

Explanation:

Greenhouse effect is caused by infrared rays. Gases like carbon dioxide absorb infrared rays, thereby increasing the temperature of earth and hence causing greenhouse effect.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q. [1 M]" from Natural Resources→Natural Resources — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Growing different crops in the same field in a pre-planned succession, to improve the quality and quantity of the crop yield and maintain the fertility of soil is known as:
→
During summer season, water kept in an earthen pot becomes cool because of the phenomenon of:
→
A particle starts from the origin at t = 0s with a velocity of 10.0j m/ s and moves in the xy−plane with a constant acceleration of the ms−2. Then y−coordinate of the particle in 2 sec is
→
Work done by a fielder in catching a ball is:
→
The gravitational force between two objects is F. If masses of both objects are halved without changing distance between them, then the gravitational force would become:
→
 Matter changes from one state to another state on change in ___________?
→
State the S.I. units of mass and weight:
→

A metal in which even iron can float is:

  1. Sodium.
  2. Magnesium.
  3. Mercury.
  4. Manganese.
→
How many types of mechanical waves exist in physics?
→
Before playing the orchestra in a musical concert, a sitarist tries to adjust the tension and pluck the strings suitably. By doing so he is adjusting:
→