Lesson 1.1 - Absorbing and Losing Heat

The survivor in the Starting Point Activity on page 105 does not have any shoes.  Shoes not only protect your feet from injury by sharp objects, they keep your feet from making contact with hot or cold substances.  The beach sand is usually very hot, and shoes can protect your feet from being burned.  If the shoes absorb heat quickly, they will also burn your feet.  If the shoes absorb heat slowly, they will protect your feet from the hot sand. 

Read the investigation Keeping it Cool on pages 106 and 107 to familiarize yourself with the procedure.

Use the following data a student collected and answer the questions.

Part 1: Liquids

Substance

Starting Temperature (°C)

Ending Temperature (°C)

Time Required to Raise the Temperature 30°C

water

25°C

55°C

200 seconds

motor oil

25°C

55°C

115 seconds

vegetable oil

25°C

55°C

100 seconds

Part 2: Solids

Substance

Starting Temperature (°C)

Ending Temperature (°C)

Time Required to Raise the Temperature 30°C

glass marbles

25°C

55°C

100 seconds

sand

25°C

55°C

95 seconds

steel shot

25°C

55°C

85 seconds

 

Question 1. Answer the Analyze questions 1 to 4 on page 107 in your textbook. 

Question 2. Answer the Conclude and Apply question 5 on page 107 in your textbook. 

 

Check your answers with those that follow.

 

 

 

 

 

 

 

 

 

 

 

Answers to Analyze questions:

Question 1. Water took the longest time to increase in temperature by 30°C. 

Question 2. The oils took about the same time to warm up to the same temperature.  This is because they are similar substances.  

Question 3. The glass marbles took the longest time to increase in temperature by 30°C.    

Question 4. The glass marbles and the sand took about the same time to warm up to the same temperature.  This is because they are similar substances. 

 

Answer to Conclude and Apply question 5:

Question 5. a.  Yes, the kind of material being heated affects the amount of heat needed to change the temperature by the same amount.
b.  The time taken to heat up to the same temperature is the evidence that shows this.


Go to the next page to continue Lesson 1.