Clouds & Particles

Basics

3. Sun and clouds

Worksheet 1

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Can you answer the following questions?

1) What is the albedo?

a) The percentage of light reflected by an object.
b) A South-American sun dance.
c) The rainbow.
d) An African rain dance.

2) White sunlight contains...

a) all of the colours except red.
b) all of the colours of the rainbow.
c) none of the colours except red.
d) none of the colours of the rainbow.

3) An object appearing as red ...

a) reflects all colours back into space.
b) reflects all colours back into space except red.
c) absorbs all colors.
d) absorbs all colors except red.

4) An object appearing as black ...

a) reflects all colours back into space except black.
b) reflects all colours back into space.
c) absorbs all colours except black.
d) absorbs all colours.

5) Which of the following statements is correct?

a) The blacker an object is, the larger its albedo is.
b) The redder an object is, the larger its albedo is.
c) The whiter an object is, the larger its albedo is.
d) The smaller an object is, the larger its albedo is.

6) Which of the following statements is correct?

a) The more matt an object is, the larger its albedo is.
b) The glossier an object is, the larger its albedo.
c) The softer an object is, the larger its albedo is.
d) The warmer an object is, the larger its albedo is.

7) Thin cirrus clouds have a low albedo because they are...

a) big.
b) white.
c) not transparent to sunlight.
d) partially transparent to sunlight.

8) Which of the following characteristics of a cloud gives the largest albedo?

a) thick and high with many big droplets
b) thin and high with only a few big droplets
c) thick and low with many big droplets
d) thick and high with a few big droplets

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About this page:

Authors: Ellen K. Henriksen and Camilla Schreiner - University of Oslo - Norway. Scientific reviewer: Justine Gourdeau - LaMP Clermont ferrand - France - 2004-01-13. Quiz programmer: Julia Heres - University of Nürnberg - Germany. Last update: 2004-03-27.

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