chemical vs physical changes

Which of these is true of fruits blended together?

• chemical change
• physical change
• both types of changes
• none of these

Tags

NGSS.5-PS1-4

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-PS1-4

NGSS.MS-PS3-4

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

Tags

NGSS.MS-PS1-2

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 flame out
• nothing happens
• changes color

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

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

• physical
• chemical
• both
• neither

Tags

NGSS.MS-LS1-7

NGSS.MS-PS1-2

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

• physical
• chemical
• both
• neither

Tags

NGSS.5-PS1-4