Food Calorimetry Pre-Lab

Goal:
Design a calorimetry experiment to calculate the amount of energy in different foods. 

Homework:
Practice Quizlet Flashcards

Agenda:
Warmup - Socrative Quiz
Demo + Discussion
Read 
Design a Procedure - Flowgram
Class Write - Protocol

Warmup - Socrative Quiz
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Demo + Discussion 
Demo: Jug-O-Doom (again, because it's fun)
Discuss: 

1. What forms of energy are represented in this demo?
2. Using the principles of heat transfer, how might we calculate the amount of chemical energy that was released in the demo?

Read

Read the background for Monday's lab to get an idea of how scientists use calorimetry experiments to measure the amount of energy in a substance. 

Design a Procedure - Flowgram

On whiteboards, draw a flowgram to show how you can use calorimetry to find out how much energy is in different foods. Be specific, we will use these to write a procedure. 

Class Write - Protocol

Choose a scribe. Get in a circle. We are going to use what you came up with on your whiteboards to write a step-by-step protocol for Monday's lab. 

Calorimetry

Goal:
Master calorimetry calculations (Q=mC∆T).

Homework:
Finish Calorimetry Practice
Practice Quizlet Flashcards

Agenda:
Discussion
Notes
Practice
Exit Ticket Quiz

Discussion:
What were the factors that affect heat transfer? How did they affect heat transfer?

Notes:
I will go over these slides. You may take notes in whatever fashion works best for you.


Practice:
Open this worksheet in notability and complete it using your new knowledge. Check your answers with the answer key here. 

Exit Ticket Quiz
I will pass out this 1 question quiz to you. Complete it and turn it in as you walk out the door. 

Heat Transfers

Goal:
Conduct an investigation to identify how different variables affect the amount of heat transferred between objects. 

Agenda:
Warmup
Demo + Discussion
Experiment
Exit Ticket

Warmup
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Demo + Discussion
One balloon is full of carbon dioxide. The other balloon is full of water. If I hold a flame under them...
What is the direction of heat flow?
What is happening to the molecules inside the balloons?

Experiment
In this experiment we are going to make hypotheses about things that can change the amount of heat absorbed from water.

1. How can you measure the amount of heat transferred between substances?
2. Make a list of things you PREDICT will change the amount of heat transferred.
3. Design controlled experiments to test these predictions. 
4. Record your observations in your journal (Title: Ice Experiment). Here are some suggested sentence stems:
1. When we increased _________________, the temperature <increased or decreased> from _____ degrees Celsius to _____ degrees Celsius, a difference of _____ degrees. 
2. When we changed _________________, the temperature <increased or decreased> from _____ degrees Celsius to _____ degrees Celsius, a difference of _____ degrees. 
5. Make sense: what variables affected the heat transfer? Did this match your prediction?

Exit Ticket
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Teacher's Question:
What are the three variables that affect the amount of heat transferred between objects?

How does heat flow?

Goal: 
Create a mini poster showing your understanding of heat flow.

Agenda:
Socrative Quiz (Warmup)
Notes/Practice
Mini Poster

Socrative Quiz (Warmup)
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Period 1: WALLACEP1
Period 2: WALLACEP2
Period 4: WALLACEP4

Notes/PracticeCreate a new journal entry entitled "Heat Flow." Read through these slides to learn about and take notes on heat flow. Complete the practice in the slides.


Mini Poster
Look at the example poster on the last slide. Get a sheet of paper and create your own poster drawing, describing, and graphing heat flow for your own situation. You can use scenarios from movies, cooking, cars, anything where heat flows from one object to another. 

If you finish early...
Practice with the new quizlet flashcards. 

What is heat/cold?

Goal:
Get a basic foundation on heat.

Agenda:
Warmup
Discussion
Blendspace Lesson

Journal Entry
Socrative Quiz

Warmup
With your elbow partner, discuss: What forms of energy do we get from food?

Discussion
Log into Socrative and answer the question. You will be asked to share your reasoning with the class.

Blendspace Lesson
Sign up for Blendspace with your Google Account. Use class code "luke." Follow the blendspace lesson found here. Be sure to take notes. This is your foundation for the rest of the unit.

Journal Entry
Create a new journal entry entitled "Heat thought experiments." Copy the questions below into your journal and use your new knowledge to answer the questions. 

Questions

1. Use kinetic molecular theory to explain what is happening to the water molecules in an ice cube as it melts. (Hint: Are they moving faster, slower, or not changing in speed.) You must explain your reasoning.
2. What is the difference between heat and temperature?
3. How does heat flow?
4. You have two pans made of the same metal, iron. One is heavier than the other. You heat both to the same temperature. Which one will cool down faster?
5. On a winter morning, you open the door to your house. You feel a cold wind strike you as soon as the door opens. What is happening?
6. When water freezes, explain what happens to the water molecules?
7. When water boils, explain what happens to the water molecules?
8. When ice melts, explain what happens to the water molecules?

Socrative Quiz

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Period 1: WALLACEP1
Period 2: WALLACEP2

Period 4: WALLACEP4
My Question: On a winter morning, you open the door to your house.  You feel a cold wind strike you as soon as the door opens.  What is happening?