Energy Transfer
Which way does energy move when two objects touch?
From the warmer object to the cooler object.
Which has more molecules, a large brick or a small brick made of the same material?
The large brick.
Complete the sentence: The rice got hotter because _______.
Its molecules gained kinetic energy.
What is cold energy?
Cold energy doesn't exist.
What does CER stand for?
Claim, Evidence, Reasoning.
What happens to the warmer object during energy transfer?
It loses energy and cools down
Which has more total energy if both are the same temperature: a large object or a small object?
The large object.
Complete the sentence: When hot food was placed on a plate, the plate got warmer because _______
Energy transferred from the hotter food to the plate.
Can heat molecules combine or increase?
There is no such thing as heat molecules, molecules get more energy so they speed up, making the object hotter.
Which part answers the question directly?
Claim
What temperature will two equal-sized objects eventually reach after touching?
The same temperature, somewhere between their starting temperatures.
Why does a larger object change temperature less than a smaller object when both receive the same amount of energy?
The energy spreads across more molecules.
Why does an object cool down when it transfers energy?
Its molecules lose kinetic energy and move more slowly.
Molecules stop moving when put in refrigerator or freezer?
Which part uses facts or observations?
Evidence
Why is the phrase "cold energy moved into the object" scientifically incorrect?
There is no cold energy. Kinetic energy transfers from warmer objects to cooler objects
Two objects gain the same amount of energy. One is much larger. Which object gets warmer?
The smaller object.
A student says, "The chair became warmer because it made heat." Explain why the statement is wrong.
Energy is transferred, not created. The chair gained energy from a warmer object.
True or False. When you mix two liquids of different temperature they both will become as hot as the hottest liquid.
False when different temperature liquids are mixed they reach a temperature between their starting temperatures
Which part explains WHY the evidence supports the claim?
Reasoning justifies how evidence can prove the claim.
A hot pan warms up food. Did the hot pan lose energy, gain energy, or stay the same?
It lost energy
A large warm object touches a small cool object. After several minutes, both objects reach the same temperature.
Question: Which object experienced the greater temperature change and why?
The small object experienced the greater temperature change because the transferred energy was distributed among fewer molecules. The larger object has more molecules, so its temperature changes less for the same energy transfer. [TE_End_Of_...ring_Guide | PDF]
Make a sentence using the words molecules, energy, and temperature in one correct science explanation.
The molecules gained energy, so their temperature increased
A question says in one closed system energy increased in both objects. Why is that impossible?
Energy is conserved. If one object gains energy, another loses that same amount of energy.
make a claim, use evidence from the sentence and using your background knowledge provide the reasoning.
A metal spoon is placed in a cup of hot soup. After a few minutes, the spoon becomes warmer.
Claim: The spoon got warmer.
Evidence: The spoon was placed in hot soup, and after a few minutes its temperature increased.
Reasoning: Energy moved from the hotter soup to the cooler spoon. When the spoon gained energy, its molecules moved faster, causing its temperature to increase.