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TGK4:
The water cycle
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This is the last activity in the foundation section on mixtures.
It provides and opportunity for students to relate particle
theory ideas to different samples. If students do not select
a correct set of answers, they will have a chance to try again.
The correct answers are:
| 1. |
Sea water: mixture
of all the types of particles, with several ‘other’
particles visible. |
| 2. |
Air: no ‘other’
particles, just a mix of nitrogen, oxygen and water
particles; the spacing between particles
shows the sample is in the gaseous state. |
| 3. |
Clouds: A mix of
nitrogen, oxygen and water particles, but with the water
particles in ‘clumps’. |
| 4. |
Raindrops: Mostly
water particles with some nitrogen and oxygen particles;
the spacing suggests the sample is
in the liquid state. |
| 5. |
River water: a
mixture of all of the types of particles, with few ‘other’
particles visible. |
The third and final foundation section follows on directly
from this activity, and deals with ‘changing substances’.
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Science Enhancement Programme CD-ROM 2005 |
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user
guide |
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