OSE 6.2 End of Unit Assessment V (copy)

A teacher asks students to touch their plastic tabletop and then touch the metal leg of their chair. When asked which one is colder, the students respond that the leg is colder. The teacher then uses an infrared thermometer to determine the temperatures. Much to the students' surprise, the metal chair leg and the plastic tabletop are the same temperature. The teacher asks, "Why is it that metal objects generally feel cool or cold while plastic objects feel warm when they're the same temperature?" The class decides to investigate this phenomenon.

Which relationship(s) could be investigated with the experiment the students completed to investigate heat characteristics of objects?

Which one of the following claims is best supported by the data for Substances 1, 2, and 3?

Which one piece of data from the students' investigation best supports the following claim?

Claim: When the average kinetic energy of an object's particles increase, energy must be transferred to those particles.

Suzanne made a claim that much less energy was transferred during the cooled metal block investigation than when the block was heated.

The teacher asked Suzanne what evidence caused her to make this claim.

Which one statement is best supported by this data?

Some in the class were still uncertain how the results of this investigation were helpful in understanding why the tabletop and the chair leg felt different. The teacher asked them how they could use those same materials to conduct their own investigation.

The students decided to perform another investigation where they placed a sample of metal and plastic under a heat lamp to determine which absorbed the most energy.

Which one of the following sets of variables must be controlled to produce the best results for the investigation?

The teacher offers students one more piece of information: “When you touch an object and it transfers kinetic energy away from your hand, the object feels cool or cold. When kinetic energy moves from the object to your hand you feel warm or hot.”

This last piece of information results in the students being able to explain why the chair leg felt cold and the table felt warm.

Which one of the following best explains why your hand feels cold when you touch the chair and warm when you touch the table, even though the table and chair are each the same temperature?

In which one part of the model does chemical change most likely occur?

How do the substances at Area B and Area F of the model compare?

What one way do the particles in Area A of the model most likely compare to those in Area B?

Which one answer best explains why the candle wax solidifies in Area D?

Sofia wants to create a model illustrating the difference between the molecules of wax in the liquid state and the molecules of wax in the solid state. To accomplish this her model must be able to effectively represent which of these differences?

In emergencies, shelter or a place to sleep is very important. Often people spend nights outside on the ground. The government is trying to identify a solution that will keep people warm when they need to sleep directly on the ground. They are considering three different types of blankets and evaluating how well each of them will keep people warm. Below are their criteria and constraints.

Criteria:

1. Will keep people warm and alive sleeping outside for 6 hours at night, with no more than a 10 ℉ (5.5 degrees ℃) temperature change in the air on the inside of the blanket where the person is.
2. Can also be used to keep people warm during the day.
3. Needs to be lightweight.

Constraints:

1. Keep costs low and affordable.
2. Environmentally friendly and can be reused.

Why is the government so concerned about people getting too cold if they sleep directly on the ground?

The government is concerned about people getting too cold if they sleep directly on the ground because:

a. people have a higher body temperature than the ground.

b. energy transfers from the person to the ground.

c. energy transfers from the ground to the person.

d. the person is small compared to the Earth.

Use the information and data from the tests to make a recommendation for which blanket the government should choose.

Reasoning: Explain using scientific principles and connect the test results to the criteria and constraints.

Use these sentence starters to help you answer the question.

The __________ blanket will speed up / slow down energy transfer from the person / Earth to the person / Earth.

The thickness of the blanket will speed up / slow down the energy transfer because there is more / less material between the person and the Earth.

The light will absorb / reflect off the blanket.

This will help keep the person warm because ______ .

WRITE A CER TO ANSWER THIS QUESTION:

At night, the ground and the air just above the ground are usually about the same temperature. Engineers want to make a pop-up hammock for emergencies. This hammock would let people sleep in the air above the ground.

Making this hammock will take time and money. Before spending resources, we need to ask:

• Based on what you know about energy transfer, is this a good idea?
• Would sleeping in a hammock, with a blanket, keep a person’s temperature more stable than sleeping on the ground with a blanket?

Sentence Starter:

• I think sleeping in a hammock (would / would not) help because ___.
• Energy moves from ___ to ___, so the hammock ___ .

Claim:

Suspending a person in a hammock while wrapped in a blanket would / would not decrease the amount of temperature change compared to sleeping on the ground.

Evidence:

Pick 2 pieces of evidence from your notebook to show how touching the Earth or being surrounded by air will change the amount of energy transferred.

Reasoning:

The person being in the hammock will / will not change the rate of the energy transfer.

A solid / gas has more / less collisions and transfers energy faster.

Less / More particle collisions will slow energy transfer.