SCIENCE YEAR 9 REVIEW PACKET

SCIENCE YEAR 9 REVIEW PACKET

HCIS

Keys, Variations, Inheritance

UNIT 3

Multiple Choice

Where do offspring get their genes?

• Half from their mom, half from their dad

• From their mom

• From their dad

• From their brains

Multiple Choice

Where are genes found?

• In the mitochondria

• In our bone marrow

• Chromosomes, in the nucleus of a cell

• In our brains

Multiple Choice

What is variation?

• Racial diversity

• The variation of females and males

• Variation of personalities

• The differences between the individuals in a species

Multiple Choice

What causes variation?

• Your environment

• Your genes and your environment

• Your genes

• Your names

Multiple Choice

What is a key (genetics)?

• Something to open a lock

• Something that tells us which object something is

• A method of identifying a unknown organism

• The key to life

Selective Breeding and Natural Selection

Multiple Choice

The long and sharp beak of a woodpecker is an example of

• natural selection

• selective breeding

Multiple Choice

Which organisms are most likely to survive?

• The strongest

• The best adapted

• The fittest

• The most athletic

Multiple Choice

Which is an example of selective breeding?

• A giraffe's long neck.

• Clipping a horse's tail so it's not too long.

• Training a horse to run faster.

• Cross breeding a labrador retriever with a poodle .

Multiple Choice

"Survival of the fittest" describes which theory

• Natural selection

• Selective breeding

Multiple Choice

Selective breeding

• organisms better adapted to their environment tend to survive and produce more offspring

• process used by humans to develop new organisms with desirable characteristics

Multiple Choice

Natural selection

• organisms better adapted to their environment tend to survive and produce more offspring

• process used by humans to develop new organisms with desirable characteristics

Multiple Choice

Change over time

• Natural Selection

• Evolution

• Selective Breeding

• Homeostasis

Material Properties

UNIT 4

The Structure of Atoms

Multiple Choice

• Protons
• Neutrons
• Electrons

Multiple Choice

• Protons
• Neutrons
• Electrons

Multiple Choice

• Protons and Neutrons
• Protons and Electrons
• Neutrons and Electrons
• Neutrons and Valence Electrons

Multiple Choice

• Number of protons
• Number of neutrons
• Number of electrons
• Mass Number

Multiple Choice

• Mass Number = Atomic Number + Neutrons
• Mass Number = Atomic Number - Neutrons
• Mass Number = Atomic Number + Electrons
• Mass Number = Atomic Number - Electrons 

Multiple Choice

• Neutrons = Mass Number + Atomic Number
• Neutrons = Mass Number - Atomic Number
• Neutrons = Atomic Number + Electrons
• Neutrons = Atomic Number - Electrons

Periodic Table Trends

Multiple Choice

Vertical columns of elements (families) on the periodic table with similar  properties

• groups
• periods
• quadrants
• rows

Multiple Choice

The chart scientists use to organize and classify all the known elements

• elements chart
• the chart
• Periodic Table of the Elements
• Period table

Multiple Choice

A negatively charged subatomic particle that exists in various energy levels outside the nucleus of an atom

• neutron
• electron
• proton
• subatomic particle

Multiple Choice

Atomic radius generally increases as we move __________.  

• down a group and from right to left across a period 
• up a group and from left to right across a period 
• down a group and from left to right across a period 
• up a group and from right to left across a period 

Multiple Choice

Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

• decreases, increases 
• increases, increases
• increases, decreases 
• stays the same, increases

Multiple Choice

Which statement correctly and completely identifies a trend?

• Atomic radius decreases across a period and increases down a group.
• Electronegativity decreases across a period and decreases down a group.
• Ionization energy increases across a period and increases down a group.
• Ionic radius increases across a period and increases down a group.

Multiple Choice

Electronegativity is...

• the ability of an atom to attract/ accept electrons
• the ability of an atom to lose electrons
• the energy required to remove an electron from a specific atom
• how easy it is to make friends. 

Multiple Choice

As you move down the periodic table atoms get bigger.  This is because ____________.

• The atoms have more mass.
• The atoms have more protons.
• The atoms have more energy levels
• The atoms have more neutrons

Multiple Choice

As atoms of elements in group 16 are considered in order from top to bottom, the electronegativity of each successive element....

• decreases
• increases
• remains the same
• none of the above

Multiple Choice

Which of the following will have a larger radius than Zinc?

• Gallium
• Aluminum
• Magnesium
• Strontium

Energy Changes

UNIT 5

Multiple Choice

What type of chemical reaction absorbs energy and requires energy for the reaction to occur?

• Endothermic

• Exotermic

• Exothermic

• Endotermic

Multiple Select

Examples of endothermic reactions

• Photosynthesis

• Ice melting

• Respiration

• Sodium carbonate + ethanoic acid

• Water + calcium oxide

Multiple Choice

if less heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants

• Endothermic

• Exotermic

• Exothermic

• Entrothermic

Multiple Choice

if more heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants

• Exothermic

• Endothermic

• Exotermic

• Endotermic

Multiple Choice

When calcium reacts with water, the temperature changes from 18°C to 39°C. Which statement is correct?

• The solution at the end is acidic

• The reaction is reversible

• The reaction is exothermic

• The reaction is endothermic

Multiple Choice

ΔH value in an endothermic reaction is a positive number.

• True

• False

Reactivity

UNIT 6

Multiple Choice

In nature, metals normally react with other compounds to form minerals. What is the metal that is found in the mineral Haematite?

• Copper
• Aluminium
• Iron
• Zinc

Multiple Choice

When a metal salt reacts with a more reactive salt, what sort of reaction occurs?

• Displacement
• Neutralisation
• Combustion
• No Reaction

Multiple Choice

Metals can also react with acids. This produces a gas. What is the name of this gas?

• Hydrogen
• Carbon Dioxide
• Nitrogen
• Oxygen

Multiple Choice

How can you tell that a metal is reacting with water?

• Colour change
• Bright light
• Fizzing
• It gets colder

Multiple Choice

The alkali metals are in group 1, on the far left of the periodic table. Which of these is NOT an alkali metal?

• Lithium
• Iron
• Potassium
• Francium

Multiple Choice

Which metal is more reactive than calcium?

• magnesium
• potassium
• silver
• aluminum

Multiple Choice

Which one of the following metals reacts most vigorously with cold water?

• Sodium
• Magnesium
• Copper
• Zinc

Multiple Choice

Which of the following the most reactive in dilute acid

• magnesium

• calcium

• aluminum

• zinc

Salts

Unit 7

Multiple Choice

Bryan wants to prepare potassium sulphate by reacting an acid with potassium hydroxide. Name the acid used in this experiment.

• hydrochloric acid

• nitric acid

• sulphuric acid

Multiple Choice

Bryan wants to prepare silver chloride in the science laboratory. Which of the following reactants should he use?

• silver + hydrochloric acid

• silver hydroxide + hydrochloric acid

• silver nitrate + potassium chloride

• silver + chlorine gas

Multiple Choice

Precipitation involves mixing ___________ to form an insoluble solid that separates out from the reaction mixture.

• acid and alkali

• acid and metal

• two acids

• two solutions

Multiple Choice

What salt is produced if you react sodium hydroxide with hydrochloric acid?

• sodium hydroxide
• sodium sulfate
• sodium nitrate
• sodium chloride

Multiple Choice

Salts that are made with sulfuric acid are called ______________.

• chlorides
• sulfates
• nitrates
• carbonates

Multiple Choice

Salts that are made with hydrochloric acid are called ______________.

• chlorides
• sulfates
• nitrates
• carbonates

Multiple Choice

What type of reaction produced an insoluble salt?

• Neutralisation reaction

• Precipitation reaction

• Titration reaction

• Insoluble reaction

Multiple Choice

How do you remove the water to leave solid copper sulfate crystals?

• Filter

• Evaporate

• Distill

Multiple Choice

Complete the following word equation:

Metal + Acid -->

• Salt + water

• Salt + hydrogen

• Salt + Water + Carbon dioxide

Rates of Reaction

UNIT 8

Multiple Select

Which factors affect the rate of a reaction?

• temperature

• concentration

• surface area

• pressure

• catalyst

Multiple Choice

How is this equipment being used to measure the rate of reaction?

• The gas syringe measures how much gas is produced in a certain time

• The reaction mixture will increase in volume in a certain time

Multiple Choice

The amount of something; how many particles in a volume of a mixture

• Rate

• Collision

• Catalyst

• Concentration

Multiple Choice

The speed at which a chemical reaction occurs

• Fast

• Slow

• Rate

• Ratio

Multiple Choice

Why does breaking up a solid reactant increase the rate of reaction?

• it creates more solid
• it creates more energy
• it increases the surface area
• it increases the concentration

Multiple Choice

Icing sugar has a greater ______ _____ than a solid cube of

sugar.

• Surface Area

• Catalyst

• Temperature

Multiple Choice

How can you increase the rate of a reaction?

• Decrease the pressure

• Decrease the concentration

• Increase the concentration

Multiple Choice

What is the rate of reaction?

• How fast a reaction is

• How big a reaction is

• How loud a reaction is

Multiple Choice

Which factors increase the rate of a reaction?

• increasing temperature

• increasing concentration

• increasing surface area

• all of these

Forces in Action

UNIT 9

Multiple Choice

#16 Show all your work on your answer document. m=D⋅V

• 0.625 g

• 1.6 g

• 10 g

• 7 g

Multiple Choice

#15 Show all your work on your answer document. m=D⋅V

• 0.25 g

• 3 g

• 4 g

• 5 g

Multiple Choice

If an object has a density of .6 g/mL and you put it into water, will it sink or float?  

• sink
• float

Multiple Choice

What two types of measurements make up DENSITY? 

• Mass and Volume
• Temperature and Mass
• Grams and Centimeters
• Volume and Weight

Multiple Choice

A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density?

• 2.8g/mL
• 2.7g/mL
• 2.66.g/mL
• 2.5g/mL

Multiple Choice

How much water has been displaced in the image shown?

• 40 mL
• 65 mL
• 20 mL
• 25 mL

Multiple Choice

An irregularly shaped piece of gold was lowered into a graduated cylinder holding a volume of water equal to 17 ml. The height of the water rose to 20 ml. If the mass of the gold was 27 g, what was its density?

• 9 g/mL

• 10.5 g/mL

• 6.5 g/mL

• 8 g/mL