Physical and chemical changes

What is the best evidence that an exothermic reaction occurred in the beaker?

• color change

• the temperature increased

• odor

• mass decreased

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS1-2

What is the best evidence that an endothermic reaction occurred in the beaker?

• color

• odor

• temperature decreased

• gas

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-2

What evidence in the picture indicates that a chemical change occurred?

• temperature change

• odor

• gas

Tags

NGSS.MS-PS1-2

What state of matter is image 3?

• solid

• liquid

• gas

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Heat will continue to transfer between two areas or objects until

• melting point is reached

• the colder object absorbs all the heat energy

• both objects are the same temperature

• all heat is lost to the air

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Table salt is edible, therefore the elements that make up table salt must be edible.​    True or False

• true

• false

Tags

NGSS.MS-PS1-1

How does thermal energy move?

• cold to warmer objects

• warmer to cooler objects

• solids to liquids

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Hot air rises because it is ___________ dense than cooler air

• more

• less

Tags

NGSS.MS-ESS2-5

Mrs. Logan bought a bag of m&m's and carried them home from the store on a hot day. When she got home her candy had begin to melt. Why?

• heat transferred from the candy to the bag

• heat evaporated from the bag to the candy

• heat transferred from the environment to the candy

• heat condensed from her hand

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following is true? Choose one answer.

• Aluminum is a conductor of heat. Plastic is an insulator (but not as good as foam).

• Plastic is a conductor. Aluminum is an insulator.

• both aluminum and plastic are good conductors of heat

• both aluminum and plastic are insulators.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3