Chapter 3 Pearson Environmental Science

The basic units of matter are called

• elements

• atoms

• nucleic acids

• carbohydrates

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All material in the universe that has mass and occupies space is called

• atoms

• elements

• nucleus

• matter

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The nucleus of an atom contains

• protons

• neutrons

• protons and neutrons

• electrons and neutrons

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The weight of an atom includes

• protons

• neutrons

• protons and neutrons

• electrons

Electrons are not included in the weight of an atom because

• they are to heavy

• too light and it takes a lot of them to weigh anything

• don't matter

• the numbers get to high

A _______ is a combination of two or more atoms of the same type are called

• molecules

• compounds

• molecules and compounds

• elements

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A compound is

• two or more of the same kind of atoms put together

• two or more different atoms put together

• not really a word

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____________________ are organic compounds containing only hydrogen and carbon.

• hydrowater

• hydrocarbons

• hydrospheres

• hydromamma

A mixture in which all the ingredients are evenly distributed are called

• mixtures

• solutions

• suspensions

Macromolecules are (more than one answer)

• large molecules

• small molecules

• are need for life

• are sometimes called polymers

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