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