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PPHS - SNC1D1 exam review
PPHS - SNC1D1 exam review
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grade 9 science exam review: ecology, chemistry, electricity, space, experimental design
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1
Evidence of the Big Bang theory is
H and He (light elements) remains throughout the Universe
all of the above
measured remnant heat from the original expansion
galaxies moving away at a constant rate (red shift)
2
What is a solar prominence?
shifting colours seen in Earth's upper atmosphere
Expelled gas above an active area
low-energy gas eruptions extending thousands of km
cooler dark spots on the Sun's surface
3
What are the products of photosynthesis?
C6H12O6 and O2
CO2 and C6H12O6
C6H12O6 and H2O
CO2 and H2O
4
The best way to describe the Big Bang theory is
as an imploding star
as a dripping candle
as an explosion
as a balloon expanding
5
Which describes a pure substance consisting of two or more kinds of atoms chemically combined?
homogeneous mixture
compound
solution
element
6
What elements have a dull appearance and are poor conductors of heat and electricity?
metalloids
non-metals
metals
all of the above
7
Which of the following would be considered secondary consumers?
Minnows and Aquatic crustaceans
Raccoons only
All herbivores
Fish and Ducks
8
Where must the switch be placed in a simple circuit?
anywhere in the circuit
next to the negative terminal
next to the positive terminal
next to the load
9
Planets and Moons are
luminous
Mercury and Venus are luminous the rest are non luminous
non luminous
luminous or non luminous depending on the Sun's locale
10
The spectroscope’s application to astronomy has helped astronomers determine the ...
orbital rotation
composition of stars
distance of stars
life cycle of a star
11
The majority of the elements on the Periodic Table belong to which group?
metalloids
non-metals
gases
metals
12
Which of the following is abiotic?
ants
sand
algae
a dead bird
13
Which of the following is an example of a physical change?
mowing the lawn
photosynthesis in plants
fixing nitrogen gas
baking a cake
14
Which constellation is outlined in the diagram?
Leo
Orion
Ursa Minor
Ursa Major
15
The amount of energy that is passed from one organism to the next in a food chain is
5%
10%
20%
15%
16
The process of photosynthesis is described as
carbon dioxide + sugar → oxygen + water
sugar + oxygen → carbon dioxide + water
carbon dioxide + water → sugar + oxygen
carbon dioxide + oxygen → sugar + water
17
The thermal energy used to generate electricity from beneath the earth’s surface is called …
chemical
geological
geothermal
tidal
18
The most abundant element in the atmosphere is _____.
Hydrogen
Oxygen
Carbon dioxide
Nitrogen
19
Which of the following releases CO
2
into the atmosphere?
burning coal
driving cars
all of the above
burning trees and forests
20
A star is coolest when it is
yellow
orange
white
red
21
What is a “light year”?
years with only 365 days
how long its light in a year
distance light travels in a year
abnormally sunny years
22
The biosphere is the part of the _____ that contains living things.
Lithosphere
All of the above
Atmosphere
Hydrosphere
23
An equinox is
the point at which the Earth is its furthest from the Sun
the line on the Earth dividing night from day
the shape of a planet's orbit
when the number of hours of day and night are equal
24
Which organism would contain the most DDT in its tissues?
Algae -> Minnow -> Bass -> Osprey
minnow
bass
osprey
algae
25
What organisms ingests dead and decaying matter?
consumers
producers
omnivores
decomposers
26
Herbivores get their energy:
directly from the Sun
from carnivores
from decomposers
from plants
27
What is an astronomical unit (a.u.)?
the average distance between the Earth and the Sun
the average distance between the Earth and the Moon
any very large distance
the average distance between Earth and Pluto
28
How can an object be positively charged?
lose protons
lose electrons
gain electrons
gain protons
29
What is the change of state that occurs when frost forms on windows in winter?
condensation
evaporation
solidification
melting
30
Where are stars born?
nebula
supernova
black hole
neutron star
31
An organism's role in an ecosystem is referred to as its
environment
biotic potential
habitat
niche
32
Why do most stars and constellations seem to rise in the east and set in the west?
the Earth rotates around its axis
this only seems to happen - it is an illusion
the Earth is spinning around the Sun
the whole galaxy is spinning
33
Which of the following defines mass number?
the number of neutrons minus protons in an atom
the number of protons in an atom
the number of protons plus neutrons in an atom
the number of neutrons in an atom
34
The distance from the Sun to the Earth is
1 astronomical unit (AU)
1 light year (Ly)
8 minutes
9.46 x1012 km
35
Which planet is between Earth and Jupiter
Venus
Mars
Uranus
Saturn
36
The potential difference across two points is usually referred to as ___.
voltage
amperage
ohms
joules
37
Plants and animals both obtain their nitrogen
During cellular respiration
Directly from the atmosphere
Through symbiotic relationships
After it has been fixed by bacteria
38
Which of the following is a density-independent factor of a population?
food supply
natural disasters
disease
water quality
39
What does 9.46 X 10
12
represent?
1 astronomical unit (AU)
1 light year (ly)
diameter of the Sun
distance to the moon
40
What planet is the largest?
Mercury
Saturn
Mars
Jupiter
41
The image represents what type of relationship?
Competition
Parasitism
Mutualism
Predator-prey
42
Which of the following is the number of electrons in the outermost orbit of a phosphorus atom?
8
5
3
2
43
What is the name of the cyclic paths that all celestial bodies follow?
geocentric
retrograde motion
central axis
orbits
44
All of the following are recycled in the biosphere except
water
nitrogen
phosphorous
energy
45
Evaporation of water from plants is called
fermentation
distillation
respiration
transpiration
46
Using renewable resources while ensuring that they are not depleted is a practice called
Ecological succession
Monoculture
Sustainable development
Subsistence hunting
47
A rod that has been negatively charged touches a neutral electroscope.
Positive charges move out of the electroscope.
Negative charges move out of the electroscope.
Negative charges move into the electroscope.
Positive charges move into the electroscope.
48
At position X, carbon is most likely to be in which of the following forms?
carbohydrate (sugar)
protein
carbon solid
carbon dioxide
49
Which of the following defines atomic number?
the number of protons in an atom
the number of protons plus neutrons in an atom
the number of neutrons minus protons in an atom
the number of neutrons in an atom
50
The spectrum of an approaching star shows the dark bands shift to the
violet part of the spectrum
center of the spectrum
red part of the spectrum
blue end of the spectrum
51
Which of the processes listed below will remove CO
2
from the air?
denitrification
nitrification
respiration
photosynthesis
52
A simple circuit has
only one load
more than one path for electrons
only one battery
more than one load
53
When the Moon blocks sunlight from reaching the Earth, the result is a
lunar eclipse
spring tide
neap tide
solar eclipse
54
Plants are important because they
convert solar energy into chemical energy
make homes for other organisms
cycle water through leaves
take nitrogen out of the air
55
Which is an example of a community?
Termites in a tree
Living things in a pond
A deer in a woodlot
The trout in a stream
56
Green plants are referred to as autotrophs because they:
convert ammonia into nitrates
occupy the top of the food pyramid
feed on primary consumers
carry out photosynthesis
57
What is a meteoroid?
a lump of rock or metal ejected from the earth’s atmosphere
another name for a planet
another name for an asteroid
a lump of rock or metal pulled down through the atmosphere
58
Seasons on Earth are caused by
retrograde motion
procession of Earth's axis
tilt of Earth's axis
elliptical motion
59
A biotic factor that will cause a population of rabbits to increase is
a high number of predators
sufficient food
sufficient water
favourable temperatures
60
Which of the following is a physical change?
A solid dissolves when added to water.
Bubbles of gas form when a solid is placed in a solution.
Orange crystals change to a grey powder when heated.
A yellow precipitate forms when two clear solutions mix.
61
Which of the following contains only one element?
NaCl
H2O
Co
CO
62
A chunk of frozen matter that travels in a long orbit around the Sun is called a
comet
asteroid
meteorite
meteor
63
Which of the following is a physical property?
oxidation
corrosion
solubility
flammability
64
Which of the following is a biotic factor in this ecosystem?
amount of rainfall
oxygen given off by plants
carbon dioxide given off by animals
flowers
65
Which of the following is an abiotic factor in the ecosystem?
water temperature
fish
plants
pelican
66
Which of the following is characteristic of parasitism?
Two organisms nourish each other; both benefit.
One organism kills and consumes another.
Two organisms live together and neither is harmed
One organism lives in or on another and benefits.
67
Which of the following factors can cause a population to cycle up and down?
food supply
all of the above
disease
weather conditions
