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8th Grade Science Final Review 2020 Flashcards | StudBud
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8th Grade Science Final Review 2020
8th Grade Science Final Review 2020
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1
At which boundary would you expect the formation of mountain ranges?
B
C
A
D
2
The life cycle of an massive star is...
Nebula-Main Sequence-Red Giant-Supernova
Nebula-Main Sequence-Red Supergiant-Supernova-Black Hole
Nebula-Main Sequence-Red Supergiant-Supernova-Nuetron Star
Nebula-Supernova-Red Giant-White Dwarf
3
Is burning a candle Physical or chemical changes?
Chemical
Physical
4
How many chlorine atoms are there?
2
8
16
10
5
Human activities only have negative impacts on the oceans
True
False
6
Reactants are found on the ___________ side of the chemical equation.
Left
Right
7
How many oxygen atoms are there?
30
3
6
5
8
In order for a hurricane to form, the ocean water needs to be
warm (80 degrees or warmer)
cold/warm (50-75 degrees)
boiling (90 degrees or higher)
cold (30 degrees or below)
9
Contour lines on a topographic map that are close together indicate
ocean shorelines
steep slopes
hill tops
gentle slopes
10
What type of star is the sun?
White Dwarf
Yellow Main Sequence
Orange Super Giant
Blue Giant
11
Do the lines on the topographic map represent elevation?
True
False
12
If the same force is exerted on different objects, the greater the mass the
higher the acceleration
lower the acceleration
lower the velocity
higher the velocity
13
Warm fronts bring what kind of weather?
warm
cold
rainy
sunny
14
Population of an organism increases. Food is not enough. This is _______________.
Carrying Capacity
Exponential growth
Rewilding
A limiting factor
15
What is the contour interval of this topographic map?
20
1
10
100
16
What phase of the moon comes BEFORE this phase?
third quarter moon
first quarter moon
new moon
full moon
17
What is the distance between a speed and a velocity?
A velocity has a direction
They are the same
A speed has a direction
Spelling
18
What Moon Phase comes before this?
First Quarter
Waxing Crescent
Third or Last Quarter
Waxing Gibbous
19
Continental to Continental convergent boundaries result in...
Mid-ocean ridges and underwater volcanoes
Mountains and earthquakes
Volcanic islands and earthquakes
Volcanoes and earthquakes
20
What do continental convergent boundaries form?
Trenches
Midocean ridge
Mountains
Earthquake
21
what can divergent boundaries form
volcanic islands
mid ocean ridges
mountains
earthquakes
22
Which season is it in the Northern Hemisphere and why?
Winter because it has less sunlight
Winter because it has a more sunlight
Summer because it has less sunlight
Summer because it is tilted towards the sun
23
What are numbers that precede symbols and formulas in a chemical equation?
Coefficients
Fractions
Subscripts
Superscripts
24
The life cycle of a average size star is...
Nebula-Main Sequence-Red Super Giant-Supernova-Blackhole
Nebula-Main Sequence-Red Giant-White Dwarf
Nebula-Main Sequence- Red Giant- Red Dwarf
Nebula-Red Giant-Main Sequence-Supernova
25
Cold fronts are associated with __________ weather.
light wind & light precipitation
severe weather
26
What moon phase comes after this?
New moon
Waxing crecent
Full moon
Waning crescent
27
The Phases of the Moon
Follow a pattern with a predictable sequence
Can Occur in any order
Change every 12 years
28
Force causes acceleration
True
False
29
All of the following typically indicate chemical changes except
a change in color.
a new observable product.
a transfer of energy.
a change in state.
30
Land, ocean and atmosphere maintain fairly constant average temperatures because
Continuous motion of air & water distributes Sun's energy
NH & SH have opposite seasons
Earth is tilted & rotates on it's axis
Weather systems move from west to east
31
What determines the reactivity of an atom?
Electrons
Protons
Valence Electrons
Neutrons
32
What are families/groups in the periodic table.
Groups are on bottom of the periodic table.
Groups show how many orbits an element has, they go horizontally.
Groups break down atoms.
Groups show how many valence electrons an element has, they go vertically.
33
How many iron atoms are there?
2
8
6
4
34
What moon phases is this
Waxing gibbous
Third quarter
Waning gibbous
First quarter
35
What season is it in the Northern Hemisphere
Winter
Summer
Fall
Spring
36
a car goes at a constant speed of 30km/hr, can you say that the car has a constant velocity?
red?
yes
no
37
Which moon phases are visible during a spring tide?
First Quarter & New Moon
Full Moon & Last Quarter
New Moon and Full Moon
Last Quarter and First Quarter
38
Warm fronts cause .
days of sunshine
weeks of snow
hours of rain
days of rain
39
A collection of elements on the periodic table with similar properties are....
Periods
Families
Tables
Compounds
40
An example of change in acceleration ?
constant acceleration
Free Fall
velocity
41
What moon phases is this
Full moon
Waning crescent
Waxing crescent
New moon
42
A topographic map shows contour lines.
False
True
43
at position b in the northern hemisphere it would be?
Spring
Summer
Fall
Winter
44
During which phases of the moon does the Neap Tide occur?
Full and New Moons
Waxing and Waning Crescents
Waxing & Waning Gibbous
1st and last Quarters
45
How would you describe a place that had contour lines far apart?
Steep incline
Mostly flat
Gentle slope
A peak at the top
46
The sun is the closest star to earth.
True
False
47
When food, water and habitat is in limited supply, __________ takes place among organisms.
Symbiosis
competition
food web
co evolution
48
T/F: If there is not enough food for a population one year, the population will grow.
True
False
49
Products are...
the chemicals present after a reaction
the chemicals present before a reaction
the chemicals present before an equation
the chemicals present during a reaction
50
Explain the relationship between force and acceleration
They aren’t even related
More force= Less acceleration
Less force=More acceleration
More force=More acceleration
51
What purpose do gills on fish serve?
Allow fish to use oxygen dissolved in water
Break down water into oxygen and hydrogen
process energy quicker
Allow fish to breathe in air and water
52
Which of the following situations provide the best conditions for the formation of a hurricane?
a low-pressure center over a tropical ocean
a low-pressure center near the southern edge of a continent
a high-pressure system over a mid-latitude ocean
a high-pressure system near the eastern edge of a continent
53
A chemical formula is....
symbols only
subscripts only
symbols and supscripts with type of bond
symbols and subscripts that tell number of atoms
54
After a New Moon the phases will be...
Waning
Whining
Waving
Waxing
55
If the force on 2 objects is the same, the object with a _______ mass will accelerate______
smaller, more
larger, more
smaller, less
none of the above
56
How Do Humans Affect The Pacific Ocean?
Over fishing of marine animals
ILOVESCIENCE
Pollution
WISDOM ROCKS
57
How do oceans impact humans?
all of these answers
we depend on oceans for jobs, food, recreation
they are vital to to water cycle
they influence weather patterns
58
Transform boundaries form what geologic events?
Mountains and Volcanoes
Supervolcanoes
Trenches and Valleys
Earthquakes and Fault Lines
59
Chemical changes happen
All of the above
because a chemical reaction occurs
because bonds are broken and atoms rearrange
because atoms rearrange and new bonds are formed
60
Contour lines ...
connect points of equal elevation
never go up or down hill
never cross each other
all of the above
61
Speed = Velocity with a direction
True
False
62
How do human activities affect streams and lakes?
Activities increase the water levels in streams & lakes
Human activities do not affect our streams and lakes.
Runoff can carry fertilizers, pesticides, &other materials.
None of these
63
A chemical change
creates a new substance and you can undo the change
doesn't create anything new, but you cannot go back
creates something new and you can't undo the change
doesn't create anything new, but you can undo it
