Complete the claim: The temperature in the pack changed because when the ​ (a)   combined a chemical ​ (b)   occurred. Energy was ​ (c)   , making the pack feel (d)   .

• reactants
• reaction
• absorbed
• colder
• products
• released
• hotter

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-5

When atoms come together to form a chemical bond, energy is _________

• Absorbed from the surroundings

• Released into the surroundings

• Created where it did not previously exist

• Used up and then no longer exists

Tags

NGSS.HS-PS1-4

Exothermic reactions _________

• Release more energy than they absorb

• Absorb more energy than they release

• Release and absorb exactly the same amount of energy

• Can either release more energy than they absorb, or absorb more energy than they release, depending on the reaction

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-5

Energy is needed to break bonds in chemical reactions.

• True

• False

Tags

NGSS.HS-PS1-4

A chemical reaction in which more energy is absorbed than is released is endothermic.

• True

• False

Tags

NGSS.MS-PS1-4

Fill in the blanks to provide evidence of temperature change in your hot pack. The temperature​ (a)   , which means that energy was ​ (b)   . This is an example of an (c)   reaction.

• increased
• exothermic
• released
• hotter
• decreased
• endothermic
• absorbed
• colder

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

What was the temperature change in your hot pack? Include a plus or minus sign and then the number; do not include units or words. (ex. -10 or +2)

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which reasoning did you choose in your slideshow?

• Choice 1

  (green slide)

• Choice 2

  (yellow slide)

• Choice 3

  (pink slide)

Tags

NGSS.MS-LS1-3

NGSS.MS-LS1-4

Choose the image that best represent your hot pack.

• 
• 

Tags

NGSS.MS-PS3-3

Choose the image that best represent your hot pack.

• 
• 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4