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Grade 8 Science Final review part 2 only Flashcards | StudBud
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Grade 8 Science Final review part 2 only
Grade 8 Science Final review part 2 only
40 terms
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#Wilson4evah
Flashcards
40 cards
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Practice quiz
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Questions
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Answers
1
Machines are never 100% efficient due to
heat
poor workmanship
matrial
friction
2
What causes the bends?
diver descends to the bottom too fast
runs out of oxygen in their tank
diver ascends from the bottom too fast
goes too deep underwater
3
Where did Moraines form?
from deposits of melt water
at the start of glaciers
at the edges of glaciers
at the back of glaciers
4
Tides are caused by what
gravity of moon and sun
rotation of sun
water changes
gravity of earth
5
The forces deep within earth led to mountain ranges being formed what evidence demonstrate this
oceaonic ridges and oceanic trenches
volcanic islands
sea mounts
oceanic trenches and volcanic islands
6
What caused the mountains in waterton and the coulees of lethbridge
erosion and plate tectonics
the wind
volcanic action
glaciation and plate tectonics
7
what percent of the Earths fresh water is underground
73
9
22
97
8
Why does a substance dissolve without stirring?
water moves faster than other substances
the water takes the shape of the container
in cold water the particles move faster
particlesofH2o are attracted to particles of other substance
9
the removal of metabolic wastes is called
digestion
metabolism
excretion
none of the above
10
How many chambers does the heart have?
2
6
8
4
11
Bioluminescence means light producing organisms, this occurs due to....
photophores only
photphores or bacteria
flagella
light bulbs
12
Starfish are found in a
continental shelf
Estuary
oceanic zone
intertidal zone
13
the difference between a convex lens and a concave lens is that a
convex lenses spread out light
concave lens is thicker in the middle
concave lenses bring light together
convex lens is thicker in the middle
14
Red blood cells do not carry
Carbon Dioxide
oxygen
15
In an ideal device the
MA is less than SR
MA and SR are not related
<p>MA is greater than SR</p>
MA is the same as SR
16
If you removed the surfactant from the detergent your clothes would....
get clean but have stains
remain dirty but smell nice
clean the laundry machine
remain dirty
17
a series of different sized gears working together refers to a
driven gear
driving gear
gear train
<p>transmission</p>
18
The continental divide is located between
Alberta and BC
foothills and mountains
Alberta and Saskatchewan
Alberta and USA
19
An example of a behavioural adaptation would be
Fish not freezing in the winter because of antifreeze
a gibbons long arms
birds flying south for the winter
a bird being able to fly
20
The heart circulates blood through how many seperate loops?
3
8
2
4
21
In order to increase the speed of rotation in a gear system
the driving gear must be larger than the driven gear
the 2 gears must be the same size
the driving gear must be smaller than the driven gear
22
The number of waves per unit of time is referred to as
amplitude
wavelength
frequency
23
The Labrador current is
hot
cold
warm
24
What are uses of reservoirs?
generation of electricity
irrigation
drinking water
all of the choices
25
The dissadvantage of exerting a force over a greater distance than the load refers to a
lever
wheel and axle
screw
inclined plane
26
What percentage of the earths surface is water?
74
97
9
67
27
Silt and mud settle out of a river or stream dut to the speed of the water
staying the same
decreasing
changing temperature
increasing
28
The fog in Newfoundland is in part due to the
cold gulf stream
Warm gulf stream
warm Labrador current
Cold Labrador current
29
Why do we have shadows?
light bends around objects
light is absorbed and blocked by the object
light goes through the object
30
The gulf stream is
warm
hot
cold
31
when doctor taps your knee and your leg moves, this is called
adaptation
jumping
metabolism
response to a stimulus
32
Particles move the most in a substance that is
cold gas
hot solid
hot gas
cold solid
33
The ease to which a fluid flows is called its
flowness
viscosity
bouyancy
density
34
What does a diamond do to light that allows it to sparkle?
Absorbs
Reflects
Refracts
35
What is the function of a microscope?
magnifiy tiny objects
see distant objects clearly
see in outer space
decorate the science classroom
36
A convex lens is ____________ in the middle compared to a concave lens.
thinner
taller
thicker
shorter
37
The disadvantage of having to turn a greater distance refers to which simple machine
wedge
pulley
lever
wheel and axle
38
What 2 practices result in discharge of water into streams and lakes?
run off and factories
run off and power stations
power stations and factories
factories and sewage
39
What type of rays can damage the skin and lead to skin cancer
infrared waves
radio waves
microwaves
ultraviolet rays
40
Abiotic means non -living. Which of the following is not abiotic
chemicals
minerals
organic matter
organisms
