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Grade 9 Science Review

Total questions: 50

Worksheet time: 31mins

Name
Class
Date
1.

A step-by-step sequence of organisms showing how organisms feed on each other (pictured above) is referred to as:

a)

an ecosystem

b)

a food chain

c)

a population

d)

an ecological pyramid

2.

The original source of almost all energy for ecosystems is:

a)

detritus

b)

autotrophs

c)

producers

d)

the sun

3.

What does biotic mean?

a)

Living

b)

Non-living

4.

An increase in the concentration of a chemical in an organism over time (pictured above) is called:

a)

Bioaccumulation

b)

Biomagnification

c)

Biosis

d)

Biojumanji

5.

The process by which plants use sunlight to create foods from carbon dioxide and water is called:

a)

Cellular respiration

b)

Photosynthesis

c)

Onomatopoeia

d)

Water cycle

6.

The process by which energy is used and carbon dioxide/water is released when organisms breathe in oxygen and eat food is called:

a)

Photosynthesis

b)

Cellular respiration

c)

Onomatopoeia

d)

Water cycle

7.

What does the picture show?

a)

Cellular respiration

b)

Photosynthesis

c)

The water cycle

d)

The carbon cycle

8.

What is the producer in the food web above

a)

Mouse

b)

Snake

c)

Lizard

d)

Grass

9.

Based on the food web, the snake is a:

a)

Herbivore

b)

Omnivore

c)

Carnivore

d)

Foodie

10.

Which of the following are the result of human activities that have caused biodiversity to decrease?

a)

Habitat change

b)

Overexploitation

c)

Pollution

d)

Invasive Species

e)

All of the options

11.

Which of the following is NOT one of the terrestrial planets?

a)

Earth

b)

Uranus

c)

Mars

d)

Mercury

12.

Fill in the blank: All of the following planets are gas giants except for _____________, which is an example of a terrestrial planet

a)

Jupiter

b)

Neptune

c)

Mars

d)

Saturn

13.

This celestial object is made of mostly hydrogen and helium:

a)

Planet

b)

Moon

c)

Comet

d)

Star

14.

Which of the following is not one of the 8 planets in our solar system and is actually called a 'dwarf planet'?

a)

Jupiter

b)

Mercury

c)

Neptune

d)

Pluto

15.

True or False: The Sun will eventually burn out (run out of fuel)

a)

True

b)

False

16.

What is the correct order of planets starting with the planets closest to the Sun?

a)

Venus, Mercury, Mars, Earth, Jupiter, Saturn, Neptune, Uranus

b)

Mars, Mercury, Venus, Earth, Jupiter, Uranus, Saturn, Neptune

c)

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

d)

Mercury, Venus, Earth, Mars, Saturn, Uranus, Neptune, Jupiter

17.

The rotation of the earth (spinning on its axis) leads to:

a)

Seasons (e.g. summer, winter)

b)

Day and night

18.

The revolution of the earth (orbit around the Sun) leads to:

a)

Seasons (e.g. summer, winter)

b)

Day and night

19.

If matter is changed so that a new substance is created, this is called a:

a)

Physical property

b)

Chemical property

c)

Physical change

d)

Chemical change

20.

Which of the following is NOT a main type of mixture:

a)

Solution

b)

Suspension

c)

Mechanical mixture

d)

Element

21.

Which of the following is an example of a chemical change?

a)

Water evaporating

b)

Salt dissolving in water

c)

Baking soda reacting with water

d)

Cutting vegetables

22.

Which of the following is a heterogeneous mixture?

a)

Apple juice

b)

Salt water

c)

Clean Air

d)

Fruit Loops cereal

23.

Which of the following is a mechanical mixture?

a)

Cranberry juice

b)

Ketchup

c)

Sprite pop

d)

Oil and water

24.

If the mass of a substance is 4 g and the volume is 2 ml then the density must be:

a)

1 g/mL

b)

0.5 g/mL

c)

5 g/mL

d)

2 g/mL

25.

Which of the following is NOT an element:

a)

Copper

b)

Hydrogen

c)

Oxygen

d)

Water

26.

Which of the following is NOT an element:

a)

Copper

b)

Hydrogen

c)

Oxygen

d)

Water

27.

Which element is represented by the Bohr-Rutherford diagram in the picture?

a)

Sodium

b)

Hydrogen

c)

Helium

d)

Lithium

28.

An atom that gains or loses electrons is called a(n):

a)

Element

b)

Neutron

c)

Ion

d)

Atomizer

29.

What kind of charge does each electron have?

a)

Positive charge

b)

Negative charge

c)

No charge

30.

What kind of charge does each proton have?

a)

Positive charge

b)

Negative charge

c)

No charge

31.

Rows (going from left to right) on the periodic table are called:

a)

Groups

b)

Periods

c)

Elementals

d)

Trumpets

32.

Columns (going from up to down) on the periodic table are called:

a)

Groups (or Families)

b)

Periods

c)

Elementals

d)

Trumpets

33.

How many atoms are there in total in a carbon dioxide molecule (CO2)

a)

1

b)

2

c)

3

d)

4

34.

When an object loses electrons it becomes:

a)

Positively charged

b)

Negatively charged

35.

When an object gains electrons it becomes:

a)

Negatively charged

b)

Positively charged

36.

When a switch is open (like in the picture above), will electricity be able to run through it?

a)

Yes

b)

No

37.

Why is there plastic around copper wires (as shown in the picture above)?

a)

The plastic insulates the electricity

b)

The plastic conducts electricity

c)

Because it looks cool

d)

You've confused me again Mr. Bulger...

38.

The ability to slow the flow of electrons is called:

a)

Resistance

b)

Insulation value

c)

Voltage

d)

Capacitance

39.

The pressure from an electrical circuit's power source that pushes charged electrons is called:

a)

Load

b)

Voltage

c)

Switch

d)

Current

40.

The level of shininess or dullness of a substance is called:

a)

Lustre

b)

Viscocity

c)

Malleability

d)

Ductility

41.

Which of following is NOT a sign of a chemical change:

a)

Colour change

b)

Precipitate forms

c)

Fire/light is produced

d)

Change of state

42.
Two like charges:
a)
 neutralize each other.
b)
repel each other. 
c)
must be neutrons. 
d)
attract each other.
43.
This is the symbol for a _____?
a)
an AC current source
b)
a DC current source
c)
a battery
d)
a single cell
44.
The picture shows an electrical circuit. This circuit is a series circuit because: 
a)
It has 3 light bulbs.
b)
The same current flows through all three light bulbs.
c)
It uses a single battery.
d)
The electrical current is divided between the three light bulbs.
45.
Which best describes a parallel circuit?
a)
Electricity flows along one pathway.
b)
The flow of electricity comes from one source. 
c)
Electricity flows along more than one pathway. 
d)
The flow of electricity comes from more than one source. 
46.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
47.
Which is NOT an insulator.
a)
Wool
b)
Plastic
c)
Copper
d)
Glass
48.
What is a example of a insulator?
a)
metal 
b)
rubber
c)
water
49.
A term used to describe the number of electrons moving past a fixed point in a conductor in one second is called________.
a)
Amperage
b)
Molecule
c)
Current
d)
Ohms
50.
The voltage across each bulb is 9V.  What is the voltage across the cell?
a)
4.5
b)
9
c)
18
d)
27

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