Generation Genius: Physical & Chemical Changes

Which of these is true of fruits blended together?

• chemical change

• physical change

• both types of change

• none of these

Tags

NGSS.MS-PS1-2

Gallium spoon melting is a physical change because a puddle of _____ metal is left afterwards.

• iron

• steel

• aluminum

• gallium

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Changes between states of matter are often which?

• chemical changes

• physical changes

• both

• neither

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

When something burns it is which of these?

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

What caused the candles to go out?

• oxygen

• Izzy blowing on them

• carbon dioxide

• hydrogen

Why is this a physical change?

• it makes a mess

• same gas before and after

• it changes form

• it's not, it's a chemical change

Tags

NGSS.MS-PS1-2

How does the team know the gas produced is hydrogen?

• density

• direct observation

• temperature

• flame test

Tags

NGSS.MS-PS1-2

How does hydrogen react in a flame test?

• a pop

• puts fame out

• nothing happens

• changes color

Tags

NGSS.MS-PS1-2

The spoiling of milk is an example of which type of change?

• physical

• chemical

• both

• neither

Tags

NGSS.MS-PS1-2

Is mixing air into egg whites a physical or chemical change?

• physical

• chemical

• both

• neither