LR physical and chemical changes

Mixtures can be distinguished from compounds because ____.

• they taste better
• the are always solids
• the parts that make up a mixture keep their properties
• they are chemically bound

What evidence did you have that cooking the root vegetables was a chemical change?

• new substances were produced
• change in color
• change in odor
• change in texture
• all of the above

Tags

NGSS.MS-LS1-7

NGSS.MS-PS1-2

Cutting the roots were a chemical change.

• true
• false

Tags

NGSS.MS-PS1-2

Roasting the roots was a physical change

• true
• false

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

If all the roots were cut the same size it would be a homogeneous mixture.

• true
• false

If I put the roasted vegetables into a blender, so it all looked the same, it would be a heterogeneous mixture

• true
• false

A ________has different properties than the elements that form it.

• element
• compound
• homogeneous mixture
• heterogeneous mixture

Tags

NGSS.MS-PS1-2

Two or more elements chemically combined, whose properties are completely different from those of the individual elements, are known as ____.

• Compound
• Heterogeneous
• Homogeneous
• Solution

Tags

NGSS.MS-PS1-1

Pure substances ____.

• Are made of up of only one material
• Have definite and constant properties under certain conditions
• Are elements or compounds
• All of these are correct
• None of the above

Tags

NGSS.MS-PS1-4

An example of heterogeneous mixture is ____.

• Cola
• Iced Tea
• Sodium Chloride
• Tossed Salad