Physical Science Chapter 1: Classifying Matter

The number of elements are

• about 4
• about 50
• just over 100
• just over 200

The particle in the atom that is found outside the nucleus is the

• electron
• proton
• netron
• element

When two or more atoms join together, they form a

• combination
• model
• group
• molecule

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Which of there is an example of a compound?

• iron
• hydrogen
• rust
• calcium

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Sodium and chlorine can combine to form

• bone
• salt
• a chemical
• a solution

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Lemonade is an example of

• an element
• a compound
• a chemical
• a solution

The physical property that describes how much a substance will stretch or bend is

• hardness
• elasticity
• magnetism
• weight

An example of a physical property is

• "This substance is blue."
• "This substance can burn."
• "This substance reacts with acid."
• "This substance can combine with air."

Ash is a new substance formed when

• a fruit turns moldy.
• pyrite comes into contact with acid.
• wood is burned.
• food is digested.

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Knowing about chemical properties can help in identifying

• protons and neutrons.
• mixtures and solutions.
• the nuclei of atoms.
• elements and compounds.

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