#science 7

[gordonxyz]

[gordonxyz]

[gordonxyz]

Science Project 2.2 Ergonomics

[gordonxyz]

Science Culminating Task - Heat

[gordonxyz]

Concept Attainment

[gordonxyz]

Some societies in the past used baskets filled with water for cooking. The baskets were heated when hot stones were placed in the water. The warmth from the stone transferred to the water and cooked food.

Not all liquids warm or cool at the same rate. It all depends on heat capacity.

Which liquid has a higher heat capacity, oil or water?

Students recorded the temperature of oil and water over a 15 minute period. Each liquid had a hot metal object placed in them.

Graphs of their observation were use to answer the following questions:

Analysis Questions

Which liquid warmed more quickly? (looking for rich detail not just a binary answer - water or oil)

Which liquid reached a stable final temperature more quickly?

Identify the independent and dependent variable. (Independent= water vs oil; dependent =  temperature change)

Additional resources were used to help the students understand that the graph presents evidence for the concept of HEAT CAPACITY. Heat capacity measures the amount of energy need to raise a liquids temperature. Water has a higher heat capacity.

Make a prediction about cooling the same liquids. Which liquid would cool more quickly? Give a reason for your answer.

[gordonxyz]

[gordonxyz]