Clouds & Particles

Basics

1. Clouds

Worksheet 2

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Can you answer the following questions?

1) Droplets of water will often form on the outside of a glass of cold water. These water droplets appear because...

a) water from the inside of the glass condenses and forms droplets on the outside of the glass
b) water vapor in the air condenses and forms droplets on the cold surface of the glass
c) when pouring water into a glass, we almost always spill some of the water on the outside of the glass and the glass gets wet
d) water droplets do not appear on a glass of cold water

2) Precipitation is...

a) clouds
b) water vapour
c) falling rain, snow or hail
d) a high cliff or crag

3) The water cycle explains ...

a) why a rainbow is shaped like an arc or a part of a circle
b) the formation of spiraling water currents in streams and rivers
c) how tornados and swirling winds are formed
d) the constant circulation of water on Earth

4) Key components in the water cycle are...

a) dinosaurs
b) the refraction of the Sun’s rays into red, orange, yellow, green, blue, indigo and violet light
c) the Earth's orbit around the Sun
d) the atmosphere, land and sea

5) What is the white "smoke" which rises from a pan of boiling water?

a) Water in its liquid state.
b) Water in its gas phase.
c) Heated oxygen gas from the air above the pan.
d) Water in its solid state.

6) When air is uplifted, it will...

a) get colder.
b) get warmer.
c) stay the same temperature.
d) get colder above the sea and warmer above the land.

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2. What are the different forms of precipitation? Give at least three types.

3. Answer individually or in groups

How do you explain the following phenomena?

a) Mist above a lake?

b) A cloud cap on a mountain?

c) Night dew in the grass?

d) Cloudy air when you breathe out
on a on a cold day?

e) Fog when you open the sauna door?

1. Dew on plants. (Photo: NOAA)

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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