Unit Study Guide

Five glasses containing water at 60°C were each wrapped in different types of materials. After 10 minutes, the water temperature in each glass was recorded in the data table. Since it lost the least heat, __________ is the best insulator.

• aluminum

• cardboard

• cotton

• Styrofoam

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

A sixth grade class constructed this circuit. Which material will most likely make the light glow when connected to points X and Y?

• plastic

• cotton

• aluminum

• rubber

Jar D has greater thermal energy than _______________.

• glass A

• glass B

• glass C

• All of these

Tags

NGSS.MS-PS1-4

While the toaster is in use, you can feel warmth coming from the outside of the toaster. If we could trap this thermal energy from transferring outside of the toaster, there would be _______________ thermal energy available to toast the bread and it would toast _________________.

• more; faster

• less; slower

• more; slower

• less; faster

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

In a system that consists of a stove, a pot, boiling water, and the air surrounding these objects, the energy flows from the ​ (a)   to the ​ (b)   and from the ​ (c)   to the ​ (d)  

• stove

• water

• pot

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Maggie left a sealed jar of water outside her home. Water can be a solid, liquid, or gas. When she put it outside, the water was a solid. Twelve hours later, the water had changed phase and was a liquid. What happened to the water molecules?

• Before the student left, the molecules were moving in place. After, the molecules were moving around each other.

• Before the student left, the molecules were moving around each other. After, the molecules were moving away from each other.

• Before the student left, the molecules were moving around each other. After, the molecules were moving in place.

• Before the student left, the molecules were moving away from each other. After, the molecules were moving around each other.

Tags

NGSS.MS-PS1-4

A scientist had a container of two substances.  The image shows these substances.  At room temperature, both substances are liquids.  The same amount of energy was transferred INTO both substances.  After a few hours, one of the substances had changed phase, while the other did not.  Which substance would most likely change phases, and explain why?

• The substance #1 changed because the molecules were able to move fast enough to overcome the attraction between them. Its molecules now move away from each other.

• The substance #1 changed because the strong attraction between molecules made their movement slower. Its molecules now move around each other.

• The substance #2 changed because the weak attraction between molecules let them move faster. Its molecules now move away from each other.

• The substance #2changed because the molecules were able to move fast enough to overcome the attraction between them. Its molecules now move in place.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Scientists find two substances. One is a toxic chemical. The other is a safe chemical. Both chemicals are liquids at room temperature. As a test, the scientists transfer the same amount of energy OUT OF the two containers and find that only the toxic chemical changes phase. How is the toxic chemical different from the safe chemical?

• weaker attraction between its molecules than the safe chemical. Its molecules now move in place.

• weaker attraction between its molecules than the safe chemical. Its molecules now move around each other.

• stronger attraction between its molecules than the safe chemical. Its molecules now move away from each other.

• stronger attraction between its molecules than the safe chemical. Its molecules now move in place.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-5

The image above shows information about two different substances in sealed containers. At room temperature, both substances are liquids. A scientist transfers the same amount of energy into both substances. One substance changes phase, but the other does not. Which chemical changed phase, and why did it change?

• Substance A changed phase because its molecules were able to move fast enough to overcome the attraction between them. Its molecules now move away from each other.

• Substance A changed phase because the weak attraction between its molecules allowed them to move faster. Its molecules now move away from each other.

• Substance B changed phase because the molecules were able to move fast enough to overcome the attraction between them. Its molecules now move away from each other.

• Substance B changed phase because the strong attraction between molecules made their movement slower. Its molecules now move in place.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the chemical formula for water?

Tags

NGSS.MS-PS1-1