Science 9 - Unit B Review Slides

Science 9 - Unit B Review Slides

Multiple Choice

When water vapour cools into water, this would be called?

• Melting

• Sublimation

• Evaporation

• Condensation

Multiple Choice

Which of the following is an example of physical change?

• Melting ice

• Rusting iron

• Burning paper

• Photosynthesis

Multiple Choice

Which of the following statements best describe the changes that occur to the egg during frying?

• A physical change, because a change in state occurs and odor is detected

• A chemical change, because heat is absorbed, and a new substance is formed.

• A chemical change, because an odour is detected and heat is released

• A physical change because a new colour appears, and heat is absorbed

Multiple Choice

Cement and gravel are combined in specific proportions to produce concrete. You can see tiny parts of rocks within the concrete sidewalk.

The combination of cement and gravel is known as

• an alloy

• a solution

• a pure substance

• a mechanical mixture

Multiple Choice

What does the atomic number of an element indicate?

• The number of protons and the number of electrons in an atom

• The number of neutrons in an atom

• The number of protons in an atom

• The mass of an atom

Multiple Choice

Which of the following characteristics describes a property of metals?

• Dull

• Brittle

• Malleable

• Poor electrical conductors

Multiple Choice

Ionic compounds display which of the following characteristics?

• They can be solids, liquids, or gases at room temperature

• They have relatively low melting points

• They are good conductors or electricity

• They are malleable and ductile

Multiple Choice

The placement of metal and non-metal elements in the periodic table makes it possible to predict the formation of compounds.

Which of the following chemical formulas indicate the formation of an ionic compound?

• KI

• ICl

• SO3

• CHCl3

Multiple Choice

iron + water + oxygen -> rust

The given chemical reaction is an example of

• corrosion

• combustion

• neutralization

• decomposition

Multiple Choice

The chemical formula for aluminum oxide is

• Al2

• AlO

• AlO3

• Al2O3

Multiple Choice

What are the formulas for iron (II) oxide and iron (III) oxide, respectively?

• FeO and Fe2O3

• Fe2O and Fe3O2

• FeO2 and Fe2O4

• Fe2O2 and Fe3O4