Chemistry Worksheet: Substances and Mixtures

What is a pure substance?

• A mix of different things you can take apart

• Made of only one kind of thing

• A mix of many parts that change

• Things all mixed up

Tags

NGSS.MS-PS1-1

What is a heterogeneous mixture?

• A mix that looks the same everywhere

• A pure thing that is the same everywhere

• A mix where you can see different parts

• Salt mixed in water

In salt water, what is the solvent?

• The salt

• The water that dissolves the salt

• The whole salt water

• The tiny salt pieces

Which is a compound?

• Pure gold

• Water (H₂O)

• Sand mixed with iron

• Oxygen gas

What is a homogeneous mixture?

• You can see different parts inside

• It looks the same everywhere

• It is not the same all over

• It cannot be taken apart

What is the solute in sugar water?

• The water

• The sugar that melts in water

• The container holding it

• The whole mix

Tags

NGSS.MS-PS1-2

Which does NOT mix well with water?

• Salt

• Sugar

• Oil

• Coffee powder

What happens when you mix oil and water?

• They mix and look the same all over

• They make two layers that stay apart

• The oil disappears

• They make a new thing

Which is a homogeneous mixture?

• Pizza

• Apple juice with no pulp

• Trail mix

• Rock with many colors

What is the difference between a mixture and a compound?

• Mixtures can be taken apart by hand or tools

• Mixtures always have the same parts

• Compounds can be taken apart easily

• Compounds have parts that change all the time