1791. Without the atmospheric greenhouse effect, the average surface temperature would be:

A. Higher than at present
B. Lower than at present
C. The same as it is now
D. Much more variable than it is now
✅ The correct answer is option B.
Without this greenhouse effect, the average surface temperature would be 255 degrees kelvin (-18 degrees Celsius or 0 degrees Fahrenheit); a temperature so low that all water on Earth would freeze, the oceans would turn into ice and life, as we know it, would not exist.

1794. Many wild plant and animals are on the verge of extinction due to

A. Habitat destruction
B. Climatic changes
C. Non availability of food
D. None of the above
✅ The correct answer is option A.
But sometimes extinctions happen at a higher and a faster rate than usual. Factors such as over-exploitation, large body size, small population, massive habitat loss and position at a higher trophic level favor extinction. A plant podophyllum is at the verge of extinction due to over-exploitation.

1796. Thermal belts are:

A. Pockets of warm air resting on a valley during the afternoon
B. Pockets of cold air resting on a valley floor at night
C. Warmer hillsides that are less likely to experience freezing conditions
D. Cold, below-freezing air found at the top of a mountain
✅ The correct answer is option C.
The thermal belt refers to a mountainside zone where frost or freezing temperatures are less likely to occur than they are at either higher or lower elevations.

1797. In meteorology, the word insolation refers to:

A. A well-constructed, energy-efficient home
B. The solar constant
C. Incoming solar radiation
D. An increase in solar output
✅ The correct answer is option C.
The term insolation is derived from the words “incoming solar radiation”. Insolation is specifically applied to radiation which is arriving at earth’s atmosphere first and then earth surface.

1798. If a glass of water were surrounded by saturated air:

A. The level of the water in the glass would slowly decrease
B. The water’s temperature would slowly increase
C. The level of the water in the glass would not change
D. The water’s temperature would slowly decrease
✅ The correct answer is option C.
If a glass of water were surrounded by saturated air the level of the water in the glass would not change.

1799. _________ energy is the energy stored within the earth.

A. Geothermal
B. Mechanical
C. Wind
D. Thermal
✅ The correct answer is option A.
Thermal energy, or heat, is the energy that comes from the movement of atoms and molecules in a substance. Heat increases when these particles move faster. Geothermal energy is the thermal energy in the earth. Motion energy is energy stored in the movement of objects.

1800. The cold feeling that you experience after leaving a swimming pool on a hot, dry, summer day represents heat transfer by:

A. Conduction
B. Convection
C. Radiation
D. Latent heat
✅ The correct answer is option D.
The cold feeling that you experience after leaving a swimming pool on a hot, dry, summer day represents heat transfer by latent heat.