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EOG 8th Grade Science
Test Description: EOG 2022 8th grade study guide
Instructions: Answer all questions to get your test result.
1) In some environments, wolves prey on deer for their source of food. If all of the wolves were taken from the environment, what would most likely happen to the deer population?
A
The deer population would increase and begin to compete for food.
B
The deer population would become larger and healthier animals.
C
The deer population would decrease, because there would be an increase in disease.
D
The deer population would change color, because they would not have to hide from wolves.
2) Periods
A
Elements that are good conductors of electric current and heat, are ductile and malleable; Represents a majority of elements
B
Horizontal rows on the periodic table; Characteristics will change as you move across a Period
C
Elements that have properties of both metals and nonmetals.
D
the number of protons in the nucleus of an atom; Found on the periodic table and used to arrange the elements
3) Turbidity
A
Water that is clean and does not have any bad bacteria in it and is able to drink or be used by people
B
A situation which occurs when a gas becomes dissolved in another substance
C
Measurement of how clear the water is
D
Water that is clean and does not have any bad bacteria in it and is able to drink or be used by people
4) Salinity
A
Rain, snow, sleet, or hail that falls to the ground from the clouds
B
The water found in cracks and pores in sand, gravel and rocks below the Earth's surface
C
The saltiness or dissolved salt content of a body of water
D
The draining away of water from the surface of an area of land
5) Why do doctors suggest that people get a flu vaccine each year?
A
Viruses replicate more rapidly over time.
B
Viruses can mutate from year to year.
C
Vaccines are absorbed by the body after a year.
D
Vaccines get stronger over time.
6) Which is an example of a renewable energy resource?
A
gas
B
Biomass
C
coal
D
oil
7) What happens to water molecules during the boiling process?
A
They move faster and remain closer together as they absorb heat.
B
They move faster and farther apart as they absorb heat.
C
They move faster and move farther apart as they lose heat.
D
They move more slowly but move farther apart as they lose heat.
8) Commensalism
A
domain - kingdom - phylum - class - order - family - genus - species
B
a symbiotic relationship in which one organism benefits at the expense of another
C
an energy resource that formed over millions of years from the decayed remains of ancient plants and animals
D
a symbiotic relationship in which one organism benefits and the other is not helped or harmed
9) Mutualism
A
an organism that gets energy by breaking down the remains of dead organisms and the wastes of living things
B
a symbiotic relationship in which both organisms benefit
C
Amoebic dysentery, malaria, African sleeping sickness
D
The top number of an element box that indicates the number of protons (also electrons) in an atom
10) Decomposer
A
Non reactive elements found on the far left of the periodic table, containing a full outer shell of electrons
B
an organism that gets energy by breaking down the remains of dead organisms and the wastes of living things
C
An organized chart of all the known elements arranged horizontally by increasing atomic number (protons) and vertically by si
D
The bottom number in an element box, can be subtracted by the atomic number to calculate the number of neutrons
11) Parasitism
A
a fossil of a commonly found, widely distributed organism that lived in a specific time period, used for relative dating
B
preserved remains or evidence of organisms from the distant past
C
a symbiotic relationship in which one organism benefits at the expense of another
D
Cats and Dogs
12) Genetic Modification
A
a symbiotic relationship in which one organism benefits at the expense of another
B
makes changes in the genetic material of an organism, often to obtain a desired trait
C
area where ocean meets land, organisms survive tides, waves and currents
D
organisms that live in the deep ocean and survive extreme pressures, toxic chemicals, low temperatures, and perpetual dark.
13) Biotic Factors
A
Multicellular organisms with membrane bound organelles and a true nucleus
B
body parts with a similar function, but different structures
C
water runs downhill to the lowest elevation and collects in a body of water
D
the living parts of an ecosystem
14) Law of Conservation of Mass
A
pollution whose source can be identified, ex: oil spills, sewage leaks
B
The ratio of mass to volume. Calculated by D=m/v. Can be used to identify matter.
C
The formation of a new species from an existing species. Ex: Arctic Fox and Darwin's Finches
D
Matter is not created or destroyed, only transformed. The amount of reactants will equal the amount of the products.
15) Homogenius Mixture
A
area where ocean floor slopes, home to coral, sea turtles, colorful fish
B
Amoebic dysentery, malaria, African sleeping sickness
C
Also called a solution, particles are evenly distributed throughout.
D
all of Earth's land, water and the lower part of the atmosphere
16) Matter
A
Used for growth and repair
B
the use of isotopes, and calculation of decay, to measure the age of a preserved organism or rock layer based on half-life
C
Anything that has mass and takes up space
D
body part that no longer has a useful function in an organism
17) Atomic #
A
minerals, diamonds, metals, fossil fuels
B
An organized chart of all the known elements arranged horizontally by increasing atomic number (protons) and vertically by si
C
A single-celled (prokaryotic) microbes, 3 shapes
D
The top number of an element box that indicates the number of protons (also electrons) in an atom
18) Adhesion
A
The saltiness or dissolved salt content of a body of water
B
Attraction of water molecules to other molecules
C
A semi-enclosed are where freshwater from a river meets salty water from the sea
D
Water that doesn't come from the sea and is used for drinking water
19) Cohesion
A
Attraction between water molecules
B
Environmental Protection Agency
C
An area of land around a smaller river, stream, or lake
D
The vast body of salt water that covers almost three fourths of the earth's surface
20) what is the smallest building block of matter
A
molecule
B
compound
C
subatomic particle
D
atom
*select an answer for all questions
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