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Grade 8 MCAS Review (Earth and Life Science) Flashcards | StudBud
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Grade 8 MCAS Review (Earth and Life Science)
Grade 8 MCAS Review (Earth and Life Science)
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Review of Earth and Life Science standards for the Grade 8 MCAS Science/Technology/Engineering exam.
Flashcards
36 cards
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Questions
36
Answers
1
How are the four planets closest to the Sun different from the next four in our solar system?
The four closest planets have greater diameters.
The four closest planets have more moons.
The four closest planets take longer to complete one orbit.
The four closest planets are more dense.
2
Which of the following best describes a role of mushrooms in ecosystems?
consuming living plant material
capturing energy from sunlight
taking energy from animal hosts
breaking down dead plant material
3
Seafloor spreading provides evidence of which of the following Earth processes?
erosion of coastlines
formation of sedimentary rock
movement of crustal plates
weathering of mountains
4
What do the green algae supply to the fungi in the symbiotic relationship of lichen?
water
carbon dioxide
food
protection
5
Which of the following Earth layers has the greatest density?
Mantle
Crust
Outer Core
Inner Core
6
Which change caused bacteria that can only survive where there is no O2 to become extinct?
an increase in volcanic activity under the oceans
an increase in the number of photosynthetic organisms
the varying temperatures of each season
the slow movement of tectonic plates
7
In which kingdom is the paramecium classified?
fungi
animalia
protista
plantae
8
Which of the numbered drawings in the diagram represents a tissue?
3
2
1
4
9
Two purple-flowered plants were crossbred, why would some offspring have white flowers?
They inherited DNA coding for white flowers from one parent
They inherited DNA coding for white flowers from each parent
The offspring were produced in a dark environment
The offspring were created by asexual reproduction
10
Why did the beak shape of each species of bird in the diagram below develop differently?
To help the bird produce different songs
to help protect from a different predator
to a specific source of food
to construct a different type of nest
11
Heterozygous
Hh
HH
hh
hH
12
The Appalachian Mountains were much taller in the past than they are today. Why?
sedimentation and flooding
volcanic eruptions and landslides
weathering and erosion
tectonic collisions and earthquakes
13
In which form of reproduction will the offspring differ most from the parent in these diagrams:
D
A
C
B
14
Why does a ship's iron anchor to sink to the ocean floor when it is released overboard?
gravity
magnetism
nuclear forces
chemical forces
15
Changing tides are due to gravitational influence of what object?
the Moon
comets
asteroids
the Sun
16
Which of the following structures is
not
present in animal cells?
cell membrane
cell wall
mitochondrion
nuclues
17
Which of the following best describes the number of chromosomes in a normal human liver cell?
46 male chromosomes and 46 female chromosomes
23 original chromosomes and 23 duplicate chromosomes
23 pairs of chormosomes
46 different types of chromosomes
18
Homozygous Dominant
hH
Hh
HH
hh
19
What do these two organisms have in common?
They are photosynthetic.
They cause diseases.
They live underground.
They are unicellular
20
Which of the following groups of organisms uses sunlight to convert CO2 into sugar and oxygen?
producers
decomposers
herbivores
carnivores
21
Why is water at the surface of the ocean is warmer than water at the bottom of the ocean?
Water at the bottom of the ocean holds more dissolved soilds
Friction is created by fast moving currents at the surface
Water at the surface absorbs more energy from the sun
Wave action transfers heat from the bottom to the surface
22
What phase of the moon would result in from the diagram below?
waining crescent
new moon
waxing crescent
full moon
23
Sexual Reproduction:
Requires 3 Parents
Requires 2 Parents
Requires 1 Parent
Requires 4 Parents
24
Homozygous Recessive
HH
Hh
hh
hH
25
The instructions that determine coat color for these two dogs are stored in the...
mitochondria of hair cells.
chromosomes of every cell.
cytoplasm of skin cells.
membrane of every cell.
26
If cows are selectively bred to produce milk, what will cause offspring to receive that trait?
information in the cows' chromosomes
essential minerals in the cows' water
nutrients in the cows' food
electrical impulses in the cows' brians
27
Which statement supports the similarities between a turtle and a chicken embryo?
The turtle and the chicken are similar as adults.
The turtle is more advanced than the chicken.
The chicken and the turtle share a common ancestor.
The chicken has more offspring than the turtle.
28
Comparing the skeletons of which of the following would show the evolution of a fish species?
a fish that lived recently and a fish that lived long ago
a male fish and a female fish that could produce offspring
the same fish just after it hatched and when it was adult
the same fish before it received a cut & after it healed
29
What is the name of layer of solid brittle rock surrounding the outer 100 kilometers of Earth?
Core
Hemisphere
Lithosphere
Sediment
30
Human activity most likely contributes to which of the following changes on Earth?
a decrease in the number of volcanic eruptions
an increase in the amount of atmospheric CO2
an increase in the length of the day
a decrease in the magnitude of earthquakes
31
In the human body, which system functions primarily to defend the body against disease?
immune
nervous
digestive
respiratory
32
Which of the following is the best evidence that Earth has evolved over geologic time?
desert sand dunes that were shaped by winds
rock containing fossilized shells found on a mountain top
coral reefs that slowly changed size
deposits of sediment found at the mouth of a river
33
Which cell structure is present in both plant and animal cells and makes energy available?
nucleus
cell wall
mitochondrion
chloroplast
34
Most bacteria in a forest ecosystem are best classified as which type of organism?
decomposers
predators
producers
consumers
35
Which season is occurring in the Southern Hemisphere in the diagram below?
Winter
Fall
Spring
Summer
36
Which of the following parts of the human body is most complex?
white blood cell
heart
central nervous system
kidney
