Gases and liquids

Take a plastic bag with (Butyl Sterate or Freon) in it and hold it in your hand.  Watch what happens.  Then when all the solid is a liquid or the liquid is a gas, put an ice cube on the top of the bag.  Write your results and conclusions below.

Results:

Conclusions:

Hypothesis: A miniature water cycle can be made inside a closed container if the temperature inside is

 

Equipment: Container that can be closed, water, and a heat source.

Procedure: Take the container and put some water inside and seal the container (you may want to place a thermometer inside the container and another outside).  Place the container so that the heat source can heat the inside of the container (light bulb placed outside so that it shines inside will work).  Then set the apparatus aside and wait for the temperatures to change.  An hour or more may be needed.

Results:

Conclusions:

Brain Buster!

One day Mr. Sweetland noticed moisture on the inside of his classroom window.  Where did the moisture come from?

What was the temperature inside the classroom relative to the temperature outside the classroom?

The students noticed there was no moisture on the classroom walls.  Why do you think this was so?

Many times when there is fog early in the morning it will be all gone by the afternoon.  Why do you think this happens?

George was driving through the country side one day with his family.  He noticed a field of b lack plastic and wondered what they were growing.  His parents looked out and said that the plants looked like strawberry plants sticking up through the small holes in the plastic.  Why would the farmer want to use black plastic? (Think of one reason –OK, two reasons- A-OK, three reasons-Double-A-OK

On Mars there is not an abundance of water, but scientist think there is some carbon dioxide in the atmosphere.  What kind of carbon dioxide cycle would there be on Mars if the temperature changes would allow a cycle?

Dr. Robert Sweetland's Notes ©