Curriculum
Course: IB Physics HL
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Curriculum

IB Physics HL

Theme A — Space, Time and Motion

0/125 Dr Dabour Hub Science Diagram and Course Material

Theme B — The Particulate Nature of Matter

0/105 Dr Dabour Hub Science Diagram and Course Material

Theme C — Wave Behaviour

0/73 Dr Dabour Hub Science Diagram and Course Material

Theme D — Fields

0/77 Dr Dabour Hub Science Diagram and Course Material

Theme E — Nuclear and Quantum Physics

0/89 Dr Dabour Hub Science Diagram and Course Material

Tools and Inquiry — IB Physics skills

0/43 Dr Dabour Hub Science Diagram and Course Material
Quiz

B.2.4 The Greenhouse Effect – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
In the greenhouse effect, the radiation absorbed by greenhouse gases is mainly
visible sunlight from above
radio waves
ultraviolet from the Sun
infrared emitted by the surface
2.
Without any greenhouse effect Earth's mean temperature would be about
350 K
288 K
255 K
0 K
3.
Why does the surface radiate more power than the atmosphere lets escape to space?
The atmosphere creates additional energy
The surface also receives downward infrared radiation from the atmosphere
Energy is not conserved
The Sun's output rises at night
4.
Which is an example of positive feedback in the climate?
Melting ice lowering the albedo
More plant growth absorbing CO2
Increased reflective clouds
Photosynthesis in the oceans
5.
Roughly what fraction of the infrared re-radiated by an atmospheric layer returns downward in a simple model?
none
all of it
one half
one quarter
6.
A surface at 288 K radiates about
238 W m−2
390 W m−2
340 W m−2
1360 W m−2
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Part of Theme B — The Particulate Nature of Matter — see every lesson and quiz in this unit.
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