
Thermal Energy & Equilibrium Day1
Presentation
•
Science
•
7th Grade
•
Practice Problem
•
Hard
+1
Standards-aligned
Nettie Scott
FREE Resource
10 Slides • 11 Questions
1
2
Multiple Choice
What is the significance of understanding how distance-time graphs represent different types of motion?
It helps us predict future positions of objects
It allows us to calculate the mass of objects
It is useful for understanding chemical reactions
It helps us identify the color of objects
3
4
Open Ended
Why will both objects reach the same temperature when placed together, even if they start at different temperatures?
5
6
Open Ended
How does the amount of soup, the container it’s in, and the surface area of soup exposed to air compare to those same properties of the juice?
7
Open Ended
What accounts for the cold temperature of the juice?
8
9
Multiple Choice
What is the main goal of the virtual lab described in the slides?
To test the taste of different foods
To test thermal energy transfer and equilibrium
To compare restaurant menus
To design new food items
10
11
Multiple Choice
Which of the following factors would most likely help keep food within 3°C of its original temperature during delivery?
Using insulated containers
Packing all items together regardless of temperature
Leaving containers open to air
Using metal containers only
12
13
14
Multiple Select
In the food tray shown, which of the following arrangements would best minimize heat transfer between hot and cold items?
Place hot and cold items next to each other
Separate hot and cold items with warm items in between
Mix all items randomly
Place all cold items in one row and all hot items in another
15
16
Open Ended
A meal consists of 2 hot items, 2 warm items, and 2 cold items. The delivery container is arranged in a 3 x 2 array. What information would you need to arrange these items to keep them within 3°C of their temperature at the time they were prepared?
17
18
Open Ended
A cook has just finished making a meal. The stove has been off for five minutes, but the cast iron frying pan that was used to cook an omelet is still hot to the touch, and thermal energy is still flowing into the surrounding air. Explain why.
19
20
Fill in the Blanks
Fill in the blank: When two objects at different temperatures are placed together, heat will flow from the ___ object to the ___ object until they reach the same temperature.
Type answer...
21
Multiple Choice
Which of the following is the best example of thermal equilibrium being reached in a system?
A chilled glass and room temperature orange juice reach the same temperature.
A hot pan cools down but is still warmer than the air.
An ice cube melts completely in lemonade but the lemonade stays cold.
A warm pitcher of tea is placed in a refrigerator but remains warm.
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