Lab: What Makes The Liquid Within A Thermometer Go Up And Down
Thermometer Works - pg. 23
Purpose: What makes the liquid within a thermometer go up and down?
Hypothesis: If the liquid is placed into objects of different temperatures, then the liquid moves up in the hotter substance and down in the colder substance, because of the change in the molecular energy when the water is hot and when the water is cold.
Materials:
Test tube, about 20 mL
Isopropyl rubbing alcohol, 91%
Small cup
2 small disposable water bottles (8 oz.) or 2 small beakers
Food coloring
Parafilm
Thin transparent straw (Either cut from a dropper or from a Capri Sun® drink)
Hot water
Ice water
Procedure:
Carefully pour the colored alcohol into the test tube so that the tube is almost completely full.
With the help of a partner, stretch a small piece of parafilm over the top of the test tube so that it is well-sealed. …show more content…
About 3–4 centimeters of straw should stick out of the top of the plastic. This is your thermometer.
Pour ice water into one beaker until it is about ⅔ full.
Ask your teacher to put hot water in another beaker so it is about ⅔ full.
Carefully lower the test tube into the hot water. Watch the straw above the plastic for about 1 minute.
Ask students to predict what will happen when the warm test tube is placed in cold water.
Carefully lower the warm test tube into the cold water. Watch the straw above the plastic for about 1
Purpose: What makes the liquid within a thermometer go up and down?
Hypothesis: If the liquid is placed into objects of different temperatures, then the liquid moves up in the hotter substance and down in the colder substance, because of the change in the molecular energy when the water is hot and when the water is cold.
Materials:
Test tube, about 20 mL
Isopropyl rubbing alcohol, 91%
Small cup
2 small disposable water bottles (8 oz.) or 2 small beakers
Food coloring
Parafilm
Thin transparent straw (Either cut from a dropper or from a Capri Sun® drink)
Hot water
Ice water
Procedure:
Carefully pour the colored alcohol into the test tube so that the tube is almost completely full.
With the help of a partner, stretch a small piece of parafilm over the top of the test tube so that it is well-sealed. …show more content…
About 3–4 centimeters of straw should stick out of the top of the plastic. This is your thermometer.
Pour ice water into one beaker until it is about ⅔ full.
Ask your teacher to put hot water in another beaker so it is about ⅔ full.
Carefully lower the test tube into the hot water. Watch the straw above the plastic for about 1 minute.
Ask students to predict what will happen when the warm test tube is placed in cold water.
Carefully lower the warm test tube into the cold water. Watch the straw above the plastic for about 1