Nature of Matter Review

Front

What substance is known to sink in water?

Back

Mercury.

Front

How can substances be classified using models of matter?

Back

Model 1 is a compound, Model 2 is an element, Model 3 is a mixture.

Tags

NGSS.MS-PS1-1

Front

What does the Law of Conservation of Matter state regarding the total mass of reactants?

Back

The total mass of all reactants remains constant; in the example, it is 130 grams.

Tags

NGSS.MS-PS1-5

Front

What happens to the arrangement of particles when thermal energy is removed from a substance?

Back

The particles become more closely packed, as represented by Model 2.

Tags

NGSS.MS-PS1-4

Front

What is a pure substance?

Back

A substance composed of a single element or a single compound that cannot be broken down by physical means.

Front

What is the definition of a compound?

Back

A substance formed when two or more elements chemically bond together.

Tags

NGSS.MS-PS1-1

Front

What is the definition of an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

How does the density of a substance affect its ability to float or sink in water?

Back

Substances with a density greater than water will sink, while those with a lower density will float.

Front

What is the significance of the Law of Conservation of Matter in chemical reactions?

Back

It states that matter cannot be created or destroyed in a chemical reaction; it only changes forms.

Tags

NGSS.MS-PS1-5