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Ohio Science 8th Grade OST Review Flashcards | StudBud
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Ohio Science 8th Grade OST Review
Ohio Science 8th Grade OST Review
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Flashcards
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Questions
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1
What color is the youngest seafloor?
green
red
yellow
blue
2
The product of meiosis is....
4 cells with 1/2 the chromosomes as the parent cell
4 cells that are identical to the parent cell
2 cells with 1/2 the chromosomes as the parent cell
2 cells that are identical to the parent cell
3
Sinkholes result from the erosion of bedrock. What can you conclude about the rock underneath?
It formed during a volcanic eruption.
It is mostly gravel and sand.
It dissolves easily in water.
It is very hard and dense.
4
If a shape is shaded in on a pedigree chart, it's parents must have been ___________________.
Heterozygous
Homozygous recessive
multizygous
Homozygous dominant
5
Which trait most suggests that the mammoth was adapted to live in a cold climate?
its broad, powerful body
its long, flexible trunk
its sharp, curved tusks
its thick, furry coat
6
New crust is made and magnetized at what type of boundary?
transform
convergent subducting
convergent folding
divergent
7
During 2003, the number of earthquakes occurring were higher than usual. Where were the most?
along the edges of the Pacific Ocean
along the edges of the Atlantic Ocean
within the continental landmasses
within the ocean basins
8
Which process produces sex cells & which type of reproduction is it?
mitosis; asexual reproduction
meiosis; asexual reproduction
meiosis; sexual reproduction
mitosis; sexual reproduction
9
Which of these correctly lists the four essential parts of natural selection?
overproduction, genetic variation, selection, and adaptation
living space, adaptation, selection, and hunting
selection, extinction, underproduction, and competition
asexual reproduction genetic variation selection ,adaptation
10
How does a sex cell differ from a body cell?
sex cell has 1/2 amount of genetic material as a body cell
sex cell has the same number of chromosomes as a body cell
sex cell dœs not contain chromosomes.
sex cell contains homologous chromosomes
11
Which of these are Wegener's proof for The Theory of Continental Drift.
The freshwater Mesosaurus found on different continents
All are proof
Fossils of tropical plants found in cold Antarctica
Africa and South America fit like puzzle pieces
12
Convection currents in the __________ creates Earth's magnetic field.
crust
mantle
outer core
inner core
13
Which of the following is
not
a solid layer of Earth?
crust
inner core
mantle
outer core
14
Which diagram has the greatest net force?
b
d
a
c
15
How is the formation of the solar system similar to the differentiation of Earth into layers?
both processes, the densest materials formed a middle layer
both processes, the densest materials moved to the outside
both processes, the densest materials moved to the center.
both processes, densest materials were evenly distributed
16
Which of the following is not considered evidence for evolution?
similar patterns of development in different species
similarity among organisms that are members of same species
similar genetic information in different species
fossils of organisms with bodies similar to modern organisms
17
Convection currents in the ___________ move Earth's tectonic plates
outer core
mantle
crust
inner core
18
Which of the following provides structural evidence for evolution?
comparison of bones in legs of a human, a dog, and a bird
genetic analysis of two animals show similar DNA sequences
Fossil of Mesozoic animal similar to a modern animal.
embryos of two animals look similar at similar stages
19
What are tectonic plates?
large, slowly moving pieces of Earth’s mesosphere
large, slowly moving pieces of Earth’s outer core
large, slowly moving pieces of Earth’s asthenosphere
large, slowly moving pieces of Earth’s lithosphere
20
Which was the most recent event?
Faulting at E
Lifting at C
Deposition at F
Erosion at A
21
What process does a multi-cellular organism use to replace its damaged body cells?
Transcription
Replication
Mitosis
Meiosis
22
This process generated heat during Earth’s formation and is still a source of heat inside Earth
seismic waves
solar radiation
radioactive decay
the greenhouse effect
23
An image of a magnetic field is shown. Where is the magnetic force the strongest?
D
A
B
C
24
Which statement best describes an index fossil?
fossil of an animal captured in ice
fossil formed in soft sediment by the movement of an animal
fossil of an insect captured in amber
fossil used to establish the absolute age of a rock layer
25
What is the difference between gravitational and magnetic forces?
Magnetic is repulsive only.
Magnetic is attractive only.
Gravitational is attractive only.
Gravitational is repulsive only
26
Which of the following does not use an electromagnet?
electric motor
Doorbell
galvanometer
Hand held compass
27
The product of mitosis is...
4 cells that are identical to the parent cell
4 cells with 1/2 the chromosomes as the parent cell
2 cells that are identical to the parent cell
2 cells with 1/2 the chromosomes as the parent cell
28
Which is an example of the conversion of kinetic energy into gravitational potential energy?
a person parachuting out of an airplane
a person walking up a hill
a car racing around an oval track
a person skiing down a hill
29
If a gamete (egg or sperm) has 20 chromosomes, how many would its parents have
Its parents would have 10 chromosomes
Its parents would have 23 chromosomes.
Its parents would have 46 chromosomes
Its parents would have 40 chromosomes.
30
Scientists can tell what layers of the Earth are made of because of __________________.
internet searches
core samples of the Crust
radar from satellite images
reflection and refraction of seismic waves
31
Which process below formed the arch shown in the figure?
precipitation
erosion
volcanism
deposition
32
Mountain ranges become lower and more rounded over time. What is responsible for this change?
collisions between continental plates
deposition
weathering and erosion
movement of continents
33
Which labeled point on this map has the highest elevation?
X
Y
B
A
34
Plate boundaries: __________move away, _________ slide by each other, move towards, ________
convergent, divergent, transform
transform, convergent, divergent
folding, subducting, displacing
divergent, transform, convergent
35
Landslides, and rockfalls are examples of erosion and deposition by which agent of erosion?
Wind
Gravity
Solar energy
Oxidation
36
An atom loses an electron. What will happen when it approaches a positively-charged ion?
The ions will cancel each other out.
The ions will neither attract nor repel each other.
The ions will attract each other.
The ions will repel each other.
37
Which is a likely reason why a species would become extinct after a major environmental change?
environmental changes mean fewer predators are around
too few of species born with a trait needed to survive
environment change opens new resources with less competition
more homes for the species in the changed environment
