PS Test 3 (8th) 21-22

Property of a pure substance that can be observed without changing it to abother substance.

• Physical Property

• Chemical Property

• Biological Property

At sea level, pure water starts to boil at a temperature of

• 100 °C

• 92 °C

• 78 °C

Color, texture, hardness, density are examples of

• Chemical properties

• Biological properties

• Physical properties

Matter is anything that has mass and takes up space

• True

• False

Properties of matter that cannot be observed just by looking at or touching a substance

• Physical Properties

• Chemical Properties

• Biological Properties

Why is it important to know physical and chemical propeties of matter?

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What is an element?

• Pure substances made of air, fire, earth and water.

• Pure substance that cannot be broken down in any other simpler subtance.

• None of the above

What is an atom?

• The basic particle from which all elements are made

• The basic particle from which no elements are made

• None of the above

Atoms have the ability to combine with other atoms through chemical bonds.

• True

• False

Chemical bond is

• A force of attraction between 2 atoms

• A force of repulsion between 2 atoms

• None of the above