…acting like a greenhouse on the surface of the ______.
- (a)crust
- (b)core
- (c)mantle
- (d)planet
Correct — D, planet. The greenhouse effect traps heat at the outer surface of the whole Earth, so 'the surface of the planet' is the phrase the passage needs. 'Crust', 'mantle' and 'core' are internal layers of the Earth and have nothing to do with heat being trapped at its outer surface.
- (a)crust — Names the Earth's outer solid layer, not the whole body whose surface the greenhouse effect warms.
- (b)core — The innermost layer of the Earth, unrelated to heat trapped at the outer surface.
- (c)mantle — An internal layer between crust and core, not the whole planet meant by 'surface of the ______'.
A cloze item on the noun that names the whole Earth as a body in the greenhouse-effect context.
No directly related past PYQ was found.
- practice — not a real PYQ
Astronauts photographed the whole ______ from lunar orbit.
- (a)crust
- (b)planet
- (c)mantle
- (d)core
Answer(b) planet — the entire Earth as a body, not an inner layer.
- practice — not a real PYQ
Which one of the following is NOT an internal layer of the Earth?
- (a)Crust
- (b)Mantle
- (c)Core
- (d)Atmosphere
Answer(d) Atmosphere — the gaseous envelope around the planet, not a solid internal layer.