science project reflection

You are doing this experiment to see if gas has a mass. Our science unit is to
see what are the differences between physical and chemical
changes.With the standard connection of: observing that gases have
mass and take up space, demonstrated by using balloons or bubbles.

Aim: To observe if gas has a mass using a kettle and a balloon.

Hypothesis/prediction: I predict that the balloon will expand because of all
the gas coming out of the kettle will rise and fill the balloon
up with the air.

DOES GAS HAVE A MASS  (click here for materials and method)

Observations: Nothing much happened. The balloon didn’t even bob up, it just
stayed on it’s side.

Explanation: We thought that the balloon didn’t blow up as much as it should
have because the water had probably cooled down by the
time we got the balloon on the flask.

Discussion: Balloons can burn so be careful if you try to put them on the
spout of the kettle or on a Bunsen burner. Since balloons can be
made of rubber, latex, polychloroprene, or a nylon fabric they
stretch well.

Conclusion: If we used vinegar or salt water instead of fresh water what would
happen then? A future experiment is that you could have is
adding more heat.

Glossary

Expand- to blow up or take up a greater space.

Latex- a milky fluid found in many plants.

Polychloroprene-  polychloroprene is in a family of rubbers.

 

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