In this Unit we will cover: The Water Cycle
Unit 1 - Evaporation
In the picture on the left, you can see steam from the pot rising. How does this happen? It's evaporation! Well the heat source, which is the fire from the stove, heats up the water molecules in the pot. This causes them to become less dense and rise. When the water molecules rose from the pot they became more condensed which is why you see steam rising form the pot.
Where is the Evaporation in the pot?
Unit 2 - Condensation
Where is the condensation on the mirror?
As you can see in the picture on the left, the mirror is fogged up. How does this happen?It's condensation! Well to begin with, the heat source,which was a water boiler, heated up the water molecules causing them to become less dense and rise. When the less dense water molecules rose, they touched the cold mirror, causing the less dense water vapor to lose energy and condense on the mirror causing the mirror to fog up.
Unit 3 - Precipitation
As you can see, in the top left corner of the board there is a water bottle holding cold water with water dropplets forming on the outside of the water bottle. How and why does this happen?
Where is the precipitation on the water bottle?
This is caused by the water vapor in the air which was heated up by the air heater . When the water vapor in the air touches the cold water bottle, it losses energy and condenses. When more of the water vapor in the air condenses, it becomes heavy which forms the water droplets that form on the bottle.
In the picture in the bottom left corner of the board, you can see that the water from the tap is going into the sink. How does this show run-off? Run-off is when water is drained away. In this
photo, you can see that when the water reaches the drainer in the sink,due to the gravitational pull on the water, thewater draines away.
Unit 4 : Run-off
Where is the run-off in the sink?
Unit 5 : Transpiration
Where is the transpiration on the tree?
The picture on the right shows a tree after it rained . How does this show transpiration? Well the water from the rain went into the roots of the tree which also went into small pores on the leaves. When the water from the rain reached the small pores, the suns rays heated up the water molecules, making them less dense and rise .