Chemistry - Bundle review

Heat is added to sugar crystals and they melt.

Is this a physical change or a chemical change?

• chemical change
• physical change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Ice melts...
Is this a physical change or a chemical change?

• chemical
  chemical
• physical

Tags

NGSS.MS-PS1-4

Hot cocoa cools off...
Is this a physical change or a chemical change?

• chemical change
• physical change

Baking soda is poured into a beaker of vinegar. The beaker gets warm and bubbles are appear.

• physical
• chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

All of the following are signs of a chemical change except...

• change in temperature
• change in color
• bubbles are produced
• something dissolving

Tags

NGSS.MS-PS1-2

H₂O (solid) -> H₂O (liquid)
Was a new substance created?

• No
• Yes
• What?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Has a new substance been formed?

• yes
• no
• what?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Has a new substance been formed?

• Yes
• No
• Ack!
• Urk!

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is there any new substance here?

• yes
• no
• Urk Urk woo!
• Okay, really?! Who says "Urk Urk woo"?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Ag + H₂S + O₂ -> Ag₂S + H₂O
How many compounds are in the products of this chemical equation?

• Two! I just count the capital letters-
• Three! I just count the number of brothers in my family.
• Four! I just count the number of hairs on my nose.
• Five! I just count all of the pets I had last year.

Tags

NGSS.MS-PS1-1