Does Mixing Two/More Substances result in a new Substance?

A student bent a glow stick, and it started producing light. Is this evidence a new substance was created

• yes

• no

• we can't make new substances

Tags

NGSS.MS-PS1-2

Sally dissolved Kool-Aid in water. Is this an example of a chemical change?

• yes

• no

• Kool-Aid doesn't dissolve in water

Which observation is evidence of a chemical change?

• color change

• melting

• dissolving

• Freezing

Tags

NGSS.MS-PS1-2

Which observation is evidence of a chemical change?

• Gas released

• Turning form a liquid to a gas

• freezing

• dissolving

Tags

NGSS.MS-PS1-2

Which observation is evidence of a chemical change?

• water evaporating

• salt dissolving

• ice melting

• a fire glowing

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which observation is not evidence of a chemical change?

• carbon dioxide bubbles produced when a white powder is added to vinegar

• sugar dissolving in water

• a cake producing a smell

• a glowstick glowing

Tags

NGSS.MS-PS1-2

In a chemical change

• water turns to ice

• No new substance is formed

• A new substance is formed, and it cannot be reversed

• sugar dissolves in water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Why did a cake change color after baking in the oven?

• There was a physical change

• There was no chemical change

• The cake melted into a liquid

• Heat from the oven caused a chemical change which resulted in a new substance 'cake' being formed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4