Download JARED!!!!!!! Clouds are made of tiny drops of water or ice crystals

March 17, 2015
Bell Ringer 3/16
5 friends were looking at large, white, puffy clouds in the sky.
They wondered what the clouds were made of. This is what
they said:
Pick who you think is correct
Grace: "I think clouds are made of soft, cotton like material."
Noah: "I think clouds are made of large drops of water."
Anthony: " I think clouds are made of smoke that rises from
the land."
Logan: " I think clouds are made of evaporated water in the
form of gas."
Jared: " I think clouds are made of tiny drops of water or tiny
ice crystals."
Answer: JARED!!!!!!!
Clouds are made of tiny drops
of water or ice crystals.
Clouds are not all the same!
March 17, 2015
• Real clouds form when warm air rises in the atmosphere and
cools down. Cloud condensation nuclei, such as small
particles of dust and pollution, enable water molecules to stick
together and stop bouncing around. The water molecules
condense around the nuclei to form clouds. Clouds are just
groups of tiny water droplets that stick together around cloud
condensation nuclei when temperatures are low.
• How does the cloud in a bottle form?
• Clouds are more likely to form when it's cold. When you squeeze
the bottle, the pressure increases. This causes the temperature
inside the bottle to rise. When you release the bottle, the
pressure decreases. This causes the temperature inside the bottle
to fall and the water molecules to condense. The smoke particles
act as cloud condensation nuclei, allowing the water molecules to
condense and stick together around the smoke. There you go - a
cloud in a bottle!
March 17, 2015
Review Questions:
1. Why was the smoke needed for
the cloud to form?
2. Why did you need to increase the
pressure in the bottle for the
cloud to form?
http://www.sophia.org/tutorials/bill-nye-the-science-guy-cloud-in-a-bottle-demonst
How does it work?
Even though we don't see them, water molecules are in the air all around
us. These airborne water molecules are called water vapor. When the
molecules are bouncing around in the atmosphere, they don't normally
stick together.
Pumping air into the bottle forces the molecules to squeeze together or
compress. Releasing the pressure by removing the stopper allows the air
to expand and by doing this, the temperture of the air becomes cooler.
This cooling process allows the molecules to stick together, or condense,
more easily to form tiny water droplets. These groups of tiny water
droplets are what makes a cloud.
Clouds on Earth form when warm, moist air rises and its pressure
decreases. The air then expands and cools. As the temperature drops
below the dew point, clouds form. Tiny, invisible particles in the air such
as pollution, smoke or dust provide the nucleus on which the water
molecules can attach and collect.
March 17, 2015
3 Key Ingredients:
1.
2.
3.
http://www.youtube.com/watch?v=sGTSNYF8qIk
March 17, 2015
March 17, 2015
Identifying Clouds Video
http://www.youtube.com/watch?v=QWeorlkJ39M