Foundations of Chemistry
Classifying Matter
Physical Properties
Physical Changes
Chemical Properties and Changes
100

A substance is either a.

What is element or compound?

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100

Everything you can see and some things you cannot.

What is matter?

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100

The arrangement of atoms determines the properties of different types of. 

What is matter?

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100

During a physical change, the matter does not become something different even through.

What is physical properties change?

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100

A characteristic of matter that can be observed as it changes to a different type of matter.

What is chemical property?

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200

Many physical properties can be used to separate the compounds of a.

What is mixture?

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200

Not all atoms have the same number of three things which are.

What is protons, neutrons, and electrons?

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200

Substances and mixtures can be.

What is solids, liquids, or gases?

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200

Some solid change directly to a gas without first becoming a.

What is gas?

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200

Signs of chemical change include the formation of. 

What is bubbles or a change in energy, order, or color?

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300

Matter either changes temperature or changes state when enough thermal energy is.

What is added or removed?

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300

Atoms of most elements exist as.

What is individual atoms?

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300

Mass is sometimes confused with.

What is weight?

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300

Freezing and melting are reverse processes, and they occurs at the same.

What is temperature?

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300

A useful way to understand what happens during a chemical change reaction is to write a.

What is chemical equation?

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400

Mass is conserved during physical changes, which means that mass is the same before and after the.

What is change occur?

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400

Water is a substance but is not.

What is an element?

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400

The mass per unit volume of a substance.

What is density?

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400

Like many physical changes, dissolving is usually easy to.

What is reverse?

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400

When balancing an equation, you cannot change the chemical formula of any.

What is reactants or produces?

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500

A chemical property is observed only as a material undergoes chemical change and. 

What is changes identity?

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500

Mixtures can differ because on how well the substance that made them up are.

What is mixed?

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500

Water has a lower boiling point then.

What is salt?

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500

During physical change, the physical properties of matter.

What is change?

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500

To understand chemistry, you need to understand.

What is matter?

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