Up in the Air!

Miss Laverty February 14th, 2012PowerPoint presentation and lesson adapted from the

Edmonton Public Schools Curriculum Book

Welcome

1) If you remembered your FOIP sheet, please hand it in the bin and grab a treat!

2) Grab a copy of today’s handout on the desk 3) Fill in the KNOW section of your KWL chart

about air

Mystery Box…

Mystery Box

• Work in partners to fill in your observations and answer the questions on the “mystery bag” work sheet

• Add to your KWL chart

“Balancing Act”

Question

Does an inflated balloon weigh more than a deflated one?

Materials

• 2 balloons (same size)• 1 bamboo stick• Ruler• Tape • String

Procedure (6)

1) Use the ruler to find the center of stick2) Tie one end of string to center of stick3) Tape one balloon on each end of the stick4) Remove one of the balloons, inflate and tie it5) Attach inflated balloon back to the end of the

stick6) Observe and record results

Hypothesis

If _____________ happens then I think that _____________ will happen.

Example:If one balloon is deflated then I think that the inflated balloon will _______ (rise or fall)

Hypothesis Divide…

• Inflated balloon will rise• Scale will stay balanced• Inflated balloon will lower

Variables

• Controlled variables: size and position of balloons

• Manipulated variable: Air in balloon• Responding variable : The way the stick tilts

Diagram

Bamboo Stick

String

Results

• The deflated balloon rose and the inflated balloon lowered.

Inferences

• The an inflated balloon weighs more than a deflated balloon

• Therefore, air must have mass

Vocabulary Words

• Air: an invisible mixture of gases which make up the earth’s atmosphere

• Mass: The amount of matter in an object