Science Topic 1, Lesson 1 Review

What is one method you can use to separate the parts of a mixture?

• heterogeneous
• distillation
• homogeneous
• element

What happens when elements chemically combine?

• They dissolve in water and become a gas.
• They turn into matter that has the same physical properties.
• They form compounds with properties different from those of the individual elements.
• They form a set ratio in a molecule.

What is the difference between a heterogeneous mixture and a homogeneous mixture?

• A heterogeneous mixture is a solution, but a homogeneous mixture is trail mix.
• A heterogeneous mixture can be easily separated out into its components, but a homogeneous mixture cannot be easily separated into its components.
• A heterogeneous mixture is a chemical property, but a homogeneous mixture is a chemical property.
• A heterogeneous mixture is a substance that behaves differently, but a homogeneous mixture is a molecule that behaves the same.

How can you classify different types of matter?

• We classify different types of matter by their properties.
• We classify different types of matter by their elements.
• We classify different types of matter by their atoms.
• We classify different types of matter by their substances.

What is the first step in classifying matter?

• The first step in classifying matter is to determine whether you like the color of it.
• The first step in classifying matter is to determine what type of matter it forms when it freezes.
• The first step in classifying matter is to determine whether something is a substance.
• The first step in classifying matter is to determine how many elements it is made of.

A characteristic of a pure substance that can be observed without changing it into another substance is ...

• physical property
• element
• molecule
• atom

A group of two or more atoms held together by a chemical bond is ...

• element
• molecule
• mixture
• atom

A _________ is made up of two or more substances that are together in the same place, but their atoms are not chemically bonded.

• element
• atom
• chemical property
• mixture

Anything that has mass or takes up space is...

• atom
• element
• mixture
• matter

The basic unit from which all matter is made of is...

• element
• mixture
• atom
• compound