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8th Grade Science Review Flashcards | StudBud
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8th Grade Science Review
8th Grade Science Review
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#allyear #platetectonics #genetics #physics #naturalselection
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1
Which does NOT describe CODOMINANCE?
Uses different letters
Has only dominant alleles
Has recessive traits
Spots and stripes in nature
2
A mutation is
Never random
Predictable
Always negative to the organism
A change in DNA
3
(PICTURE) Place the rock layers in the image to the right in order from oldest to youngest.
1, 2, A, 3, B, 4, C
1, 2, 3, 4, A, B, C
C, 4, B, 3, A, 2, 1
1, 2, 3, A, B, 4, C
4
(PICTURE) What tectonic plate boundary created the Andes Mountain range?
Transform
Continental Oceanic Convergent
Continental Continental Convergent
Continental Oceanic Divergent
5
(PICTURE) What percentage of the offspring would be homozygous?
75%
25%
50%
100%
6
Most of the geologic record of sedimentary rock layers has been lost due to
Erosion
Folding
Unconformity
Faulting
7
A desk has a 12N force to the left & a 20N force to the right applied to it. How does it move?
32N to the left
32N to the right
8N to the left
8N to the right
8
T or F?? “Through natural selection,
harmful
variations gradually accumulate in a species.”
FALSE
TRUE
9
The time it takes for half of the atoms in a sample of radioactive element to decay is
Potassium-argon date
Half-life
Relative age
Absolute date
10
Which substance cannot preserve an entire organism?
Ice
Ash
Tar
Amber
11
When less
FORCE
is applied to an
EQUAL
mass, what happens to the
ACCELERATION
?
Acceleration stays the same
Acceleration decreases
Acceleration increases
12
The person in the top 2 images jumps. Which bottom image shows where the person will land?
D
C
A
B
13
Acceleration is....
a change in velocity
a change in the space time continuum
a change in speed
a change in mass
14
You & a friend are riding bikes north. As you pass your friend & look back at her,
she has disappeared into a black vortex of the upside-down.
she appears to be moving backwards.
she appears to be moving forward.
15
What two factors affect gravity?
Mass and height
Mass and weight
Mass and distance
Distance and weight
16
What landform is created by a divergent oceanic boundary?
Deep Ocean Trench
Mid-Ocean Ridge
Subduction Zone
Volcanic Mountain chain
17
In what compass direction is Maple Stream flowing?
East
Southwest
West
Northeast
18
Which statement gives an example of asexual reproduction?
Two worms mate and produce more worms.
An apple seed is produced from pollinated flowers.
Butterflies have genetic information from both parents.
A new potato plant grows from a potato.
19
This Checkered Chicken exhibits 2 dominant traits. What 'Pattern of Inheritance' is this?
Complete Dominance
Checkered Chicken Dominance
Codominance
Incomplete Dominance
20
In this image, we can say that the force acting at a distance is.....
causing WW III.
not present.
repelling the magnets.
attracting the magnets.
21
A ________ boundary is point A and a ___________ boundary is point B.
Divergent; Convergent
Convergent; Divergent
Both Convergent
Convergent; Transform
22
Which statement is TRUE about convection currents in the mantle?
As density decreases, it moves towards the lower mantle.
As density increases, it moves towards the upper mantle.
As density increases, it moves towards the lower mantle.
As density decreases, it moves towards the upper mantle.
23
Which is true about earth’s layers?
Crust has the greatest pressure.
All layers have the same pressure.
Outer core has the greatest pressure.
Inner core has the greatest pressure.
24
Which statement is TRUE about MEIOSIS?
Cells produced are sex cells.
Cells produced are body cells.
Cells produced have double the chromosomes.
Cells produced are identical to the parent.
25
S Waves CANNOT move through ____________.
Gases
All of the above
Liquids
Solids
26
What best describes the motion of earth’s plates?
Fast and constant
Fast and in stages
Slow and in stages
Slow and constant
27
In a chain of volcanic islands, like the Hawaiian islands, the oldest islands are
closest to the hot spot.
covered in gray hair.
on top of the hot spot and currently active.
furthest from the hot spot.
28
Tug of war! 3 people are pulling left with 20N each. 2 people are pulling right with 30N each -
The net force is 10N to the right.
This is a balanced force and there is no movement.
Someone is going to lose an arm.
The net force is 10N to the left.
29
(PICTURE) In the seismogram shown, what type of wave is at point A?
Secondary wave
Surface wave
Tsunami wave
Primary wave
30
Earth's core is made up of two parts: the ___ outer core and the ___ inner core.
liquid; liquid
liquid; solid
solid; solid
solid; liquid
31
Which below is a heterozygous genotype?
Bb
bb
BB
32
Which of the following does NOT support Alfred Wegener's theory of continental drift?
Mountain ranges & coalfields
Climate
Fossils
Watching the continents move in real life
33
A 500kg & a 300kg object need moved. If equal force is applied to both....
the 500kg object will accelerate slower.
they will both accelerate at the same speed.
the 500kg object will accelerate faster.
The 300kg object will accelerate slower.
34
Gravity, Magnetism, Electricity, Electromagnetism - these are all forces that....
can create energy out of nothing.
must touch in order to work.
need power from the sun to work.
act at a distance.
35
Which of the following is evidence for sea-floor spreading?
Changes in climate on Africa
New rock farther away from mid-ocean ridges
Matching patterns of magnetic stripes
Pieces of crust found on different continents
36
A lizard on a trampoline has the greatest elastic potential energy in...
2nd image.
1st image.
3rd image.
37
A trait that helps an organism survive and reproduce is called a(n)
Selection
Mutation
Variation
Adaptation
38
(PICTURE) Which recording station is farthest from the earthquake?
C
B
A
39
Why is ocean floor generally under 200 million years old?
It is impossible to date anything over 200 million years.
It is a transform boundary and the earthquakes destroy info!
It's a convergent boundary & the mountains lose the age info
The ocean floor is subducted before reaching 200 million yrs
40
Which type of stress creates a reverse fault?
shearing
tension
compression
41
A lizard on a trampoline has the greatest gravitational potential energy in ...
3rd image.
1st image.
2nd image.
42
TRUE or FALSE? A cool fluid is less dense than a warm fluid.
True
False
43
An object is in motion. If NO NEW FORCES act upon this object....
the object will slow down over time.
the object will change direction.
the object will speed up over time.
the object will continue at a constant pace.
44
To the man on this moving train, the trees the train passes appear to....
be moving backwards.
be standing still.
spontaneously combust!
be moving forward.
45
A hollow area in a sediment in the shape of an organism or part of an organism is
A trace fossil
A petrified fossil
A mold
A cast
46
What percentage will show the recessive trait?
25%
100%
75%
50%
47
Friction is a force that....
does not affect the movement of objects.
acts in the same direction of movement.
increases the movement of all objects.
acts in the opposite direction of movement.
48
Which statement below best describes this image?
A = foot wall, B = hanging wall
A = compression, B = tension
A = hanging wall, B = foot wall
A = shearing, B = compression
49
Which stations will record fewer seismic waves than the others?
Stations 2 and 3
Stations 3 and 4
Stations 1 and 4
Stations 1 and 2
50
Which of the following rock layers in the diagram have the same relative age?
1 and 6
3 and 7
5 and 10
2 and 9
