3-Gas+Experiment

**Pre- Video Conference Activities to Learn about GAS** **Essential Questions: ** What is gas as a state of matter? What properties does gas have?

Students apply their knowledge of solid, liquid, and gas properties to determine if gas occupies space and has mass and if gas changes when its temperature changes. Students will conduct one experiment to determine if gas takes up space and has mass.
 * Learning Goals: **

Watch the video and listen to the song on the home page of the States of Matter wiki.

Click here to download [|meter stick and balloon.pub]. Conduct pre-conference experiment, meter stick and balloons. Experiment Materials: · One meter stick per group · One 12 inch piece of string · Two balloons (not blown up) · Two pieces of tape · Record Sheet

Procedure: (Students in groups of 4)
 * 1) Dialogue about possible answers to: Does gas have mass? How can we find out?
 * 2) Students record “guess” or hypothesis on their record sheet.
 * 3) One student finds the center of the meter stick and ties the string at the middle.
 * 4) Can prepare this ahead of time and discuss the math involved in finding the center of the meter stick.
 * 5) One student tapes each balloon to either ends of the meter stick.
 * 6) Students test the experiment to see if the meter stick will balance with the balloons taped to the ends by holding the meter stick in the air by the centered string. Adjust the string so that the meter stick balances.
 * 7) One student removes one balloon and inflates the balloon.
 * 8) Students record “guess” or hypothesis on their record sheets. Will the meter stick still be balanced?
 * 9) The fourth student reattaches the balloon to the end of the meter stick.
 * 10) Students observe and record the results.

**During the Video Conference ** 


 * Essential Questions:**

Does gas take up space? Does gas have mass? Does gas change when its temperature changes? How do we find out?

· Students apply their knowledge of solid, liquid, and gas properties to determine if gas occupies space and has mass and if gas changes when its temperature changes. Students will conduct one experiment to determine if gas takes up space and has mass. Students will observe another experiment regarding temperature. They will observe, describe and record their results.
 * Learning Goals: **

· Students should know the properties of solids, liquids, and gases.
 * Experiment Prerequisites: **


 * Round Robin Check for Understanding **
 * ||
 * Do you have solids, liquids, and gases in your body? ||
 * ** Answer ** ||
 * I bet you could figure that out yourself if you thought about it for a while. Which are these body parts are solids? Liquids? Gases?

bones muscles blood air in your lungs toenails and fingernails saliva ||

Entire class responds by saying solid, liquid, or gas. Can add movement to responds- If answer is solid stand very stiff with arms crossed across your chest, if liquid jiggle arms at your sides, and if gas float arms above head

Click here to download [|water and tissues.pub] Materials: · One clear plastic cup per group ·<span style="font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> Two tissues per group ·<span style="font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> One medium sized bowl of water ·<span style="font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> Record Sheet
 * <span style="color: rgb(255, 0, 0); font-size: 120%;">Experiment 1 **

Procedure: (Students are in groups of 4)
 * 1) Dialogue about possible answers to: Does gas take up space? How can we find out?
 * 2) Students record “guess” or hypothesis on their record sheet.
 * 3) One student places one tissue in the bottom of the plastic cup
 * 4) Another student places the cup upside down in the bowl, placing the lip of the cup as flat on the water surface as possible.
 * 5) Press the cup into the water.
 * 6) Remove the cup from the water and examine the tissue. Record the results.
 * 7) Another student places the cup upside down in the bowl, placing the lip of the cup as flat on the water surface as possible.
 * 8) Slowly tilt the cup and observe. Record the results.
 * 9) Remove the cup from the water. The fourth student examines the tissue. Record the results.

Click here to download [|egg and bottle.pub] 1.<span style="font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> Dialogue about possible answers to: Does gas change when its temperature changes? How can we find out? 2.<span style="font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> Students record “guess” or hypothesis on their record sheet. 3.<span style="font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> Watch as PMSD students demonstrate egg in bottle experiment. 4.<span style="font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> Dialogue about possible answers to: How did the egg get in the bottle? 5.<span style="font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> Watch as PMSD students demonstrate egg out of the bottle experiment. 6.<span style="font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> Dialogue about possible answers to: How did the egg get out of the bottle?
 * <span style="color: rgb(255, 0, 0); font-size: 120%;">Experiment 2: ** (Observed in the video conference)