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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
38 cards
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Practice quiz
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Questions
38
Answers
1
In the human body, which system functions primarily to defend the body against disease?
immune
respiratory
digestive
nervous
2
Seafloor spreading provides evidence of which of the following Earth processes?
movement of crustal plates
erosion of coastlines
formation of sedimentary rock
weathering of mountains
3
Which of the following best describes a role of mushrooms in ecosystems?
consuming living plant material
breaking down dead plant material
capturing energy from sunlight
taking energy from animal hosts
4
Comparing the skeletons of which of the following would show the evolution of a fish species?
a male fish and a female fish that could produce offspring
the same fish just after it hatched and when it was adult
a fish that lived recently and a fish that lived long ago
the same fish before it received a cut & after it healed
5
Which cell structure is present in both plant and animal cells and makes energy available?
cell wall
mitochondrion
nucleus
chloroplast
6
The time of year of the winter solstice occurs has the least amount of daylight in Mass because
The Northern Hemisphere is tilted from the Sun in winter
Earth's rotational speed is greatest on the winter solstice
Earth is orbiting the sun the fastest on the winter solstice
Earth is farthest away from the Sun on the winter solstice
7
What is the cause of the measured difference in the temperature of the two soils?
Conduction within the different soil types
convection in the air above different soil types
Radiation emitted by different soil types
Condensation within different soil types
8
Which of the numbered drawings in the diagram represents a tissue?
4
1
2
3
9
Human activity most likely contributes to which of the following changes on Earth?
an increase in the amount of atmospheric CO2
a decrease in the number of volcanic eruptions
an increase in the length of the day
a decrease in the magnitude of earthquakes
10
Which of the following parts of the human body is most complex?
kidney
white blood cell
central nervous system
heart
11
Which of the following is the best evidence that Earth has evolved over geologic time?
deposits of sediment found at the mouth of a river
rock containing fossilized shells found on a mountain top
desert sand dunes that were shaped by winds
coral reefs that slowly changed size
12
Which of the following Earth layers has the greatest density?
Outer Core
Mantle
Crust
Inner Core
13
Which of the following correctly lists the structures in space from smallest to largest?
star, solar system, universe, galaxy
star, galaxy, solar system, universe
star, universe, solar system, galaxy
star, solar system, galaxy, universe
14
The instructions that determine coat color for these two dogs are stored in the...
cytoplasm of skin cells.
membrane of every cell.
mitochondria of hair cells.
chromosomes of every cell.
15
What is the name of layer of solid brittle rock surrounding the outer 100 kilometers of Earth?
Core
Hemisphere
Sediment
Lithosphere
16
If cows are selectively bred to produce milk, what will cause offspring to receive that trait?
nutrients in the cows' food
essential minerals in the cows' water
information in the cows' chromosomes
electrical impulses in the cows' brians
17
The Appalachian Mountains were much taller in the past than they are today. Why?
volcanic eruptions and landslides
tectonic collisions and earthquakes
sedimentation and flooding
weathering and erosion
18
Which season is occurring in the Southern Hemisphere in the diagram below?
Fall
Winter
Spring
Summer
19
Which change caused bacteria that can only survive where there is no O2 to become extinct?
the varying temperatures of each season
an increase in the number of photosynthetic organisms
an increase in volcanic activity under the oceans
the slow movement of tectonic plates
20
What's the best estimate of the difference in elevation between Black Bear Camp and Eagle Peak?
400 m
1200 m
1500 m
900 m
21
Most bacteria in a forest ecosystem are best classified as which type of organism?
producers
consumers
predators
decomposers
22
What do these two organisms have in common?
They cause diseases.
They live underground.
They are photosynthetic.
They are unicellular
23
Why is water at the surface of the ocean is warmer than water at the bottom of the ocean?
Water at the surface absorbs more energy from the sun
Wave action transfers heat from the bottom to the surface
Friction is created by fast moving currents at the surface
Water at the bottom of the ocean holds more dissolved soilds
24
In which kingdom is the paramecium classified?
fungi
animalia
protista
plantae
25
Which statement supports the similarities between a turtle and a chicken embryo?
The chicken has more offspring than the turtle.
The turtle is more advanced than the chicken.
The turtle and the chicken are similar as adults.
The chicken and the turtle share a common ancestor.
26
What would be most helpful to classify a newly discovered organism into the correct kingdom?
the organism's natural habitat
the color of the organism
the structure of the organism's anatomy
the location the organism was found
27
Two purple-flowered plants were crossbred, why would some offspring have white flowers?
They inherited DNA coding for white flowers from each parent
They inherited DNA coding for white flowers from one parent
The offspring were created by asexual reproduction
The offspring were produced in a dark environment
28
Changing tides are
mostly
due to gravitational influence of what object?
the Moon
the Sun
asteroids
comets
29
How is a skin cell from a mouse similar to an amoeba?
Both consume carbon dioxide.
Both have cell walls.
Both move with pseudopodia.
Both need energy.
30
Which of the following best describes the number of chromosomes in a normal human liver cell?
46 male chromosomes and 46 female chromosomes
46 different types of chromosomes
23 original chromosomes and 23 duplicate chromosomes
23 pairs of chormosomes
31
What phase of the moon would result in from the diagram below?
full moon
waining crescent
waxing crescent
new moon
32
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 are more dense.
The four closest planets have more moons.
The four closest planets take longer to complete one orbit.
33
Why did the beak shape of each species of bird in the diagram below develop differently?
To help the bird produce different songs
to construct a different type of nest
to help protect from a different predator
to a specific source of food
34
What do the green algae supply to the fungi in the symbiotic relationship of lichen?
water
carbon dioxide
food
protection
35
Which of the following structures is
not
present in animal cells?
cell wall
nuclues
cell membrane
mitochondrion
36
Why does a ship's iron anchor to sink to the ocean floor when it is released overboard?
nuclear forces
chemical forces
gravity
magnetism
37
Which of the following groups of organisms uses sunlight to convert CO2 into sugar and oxygen?
herbivores
carnivores
decomposers
producers
38
In which form of reproduction will the offspring differ most from the parent in these diagrams:
C
A
D
B
