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Worksheets8th Grade NC Science EOG Review 1
Total questions: 52
Worksheet time: 52mins
Which source of water pollution includes oil and gasoline discharge from automobiles and storm sewer drainage?
agriculture
bacteria
sedimentation
urban runoff
Which best explains the importance of dissolved gases in the ocean?
They help control pollution.
They help provide oxygen for aquatic animals.
They help maintain a constant temperature.
They help maintain constant levels of salinity.
Which best describes a bioindicator?
A species that has a short life span.
A species that depends on specific conditions to survive.
A species that can adapt to a variety of conditions.
A species that has been introduced to an ecosystem.
How can the atmosphere be considered part of the hydrosphere?
It is a source of water.
It blocks ultraviolet rays from the sun.
It contains the oxygen necessary for life on Earth.
It traps pollutants that would otherwise harm Earth.
What characteristic of aluminum allows it to be made into aluminum foil?
It is dense.
It is soluble.
It is magnetic.
It is malleable.
Which pure substance is composed of more than one element?
carbon
gold
water
sodium
Which factor best explains why some people will develop cancer and others will not after being exposed to the same high levels of a harmful chemical?
concentration of the chemical
potency of the chemical
individual susceptibility to the chemical
individual exposure to the chemical
After a chemical reaction occurs in an open test tube, measurements indicate that the mass of the reactants is greater than the mass of the products remaining in the test tube. What most likely explains the measurements?
A gas was produced.
A solid was produced.
The salinity of the reactants was high.
The temperature of the reactants was low.
Which is the best way to determine if an object is made of pure silver?
Determine the solubility of the object.
Test to see if the object is chemically reactive.
Determine the density of the object and compare to the known density of pure silver.
Compare the mass of the silver object to the mass of a piece of pure silver.
A layer of marine fossils is discovered in a desert environment. Which hypothesis best explains the discovery.
The area was once covered by water.
Volcanic activity once occurred in the area.
Erosion turned most of the limestone in the area into sand.
A catastrophic event once occurred in the area.
Fossils of warm-weather plants were found on an island in the Arctic Ocean. What can best be concluded from this discovery?
Seeds of plants have been carried to the island by migratory birds.
Spores of plants drifted by air currents to the island.
Ocean currents carried the plants to the island
The island drifted from a tropical region to its present location.
Which is best used to track the global movement of volcanic ash after an eruption.
ground truthing
satellite photographs
topographic maps
weather balloons
Which theory best describes how an asteroid striking Earth may have caused the extinction of the dinosaurs?
Heat from the asteroid caused massive fires that reduced the food supply.
Glaciers melted rapidly from heat produced by the asteroid, causing floods that destroyed the dinosaurs' habitats.
Land masses were altered by the collision, reducing the space dinosaurs could roam for food.
Dense clouds formed following the collision, causing a global drop in temperature.
Which statement best explains the reason muscle cells have more mitochondria than skin cells?
Muscle cells use more energy than skin cells.
Muscle cells have fewer proteins than skin cells.
Muscle cells have a smaller nucleus than skin cells.
Muscle cells have more excess water than skin cells.
What is the role of cytoplasm in a living cell?
fight infections
digest proteins
surround organelles
pass on genetic information
How are parasites and viruses similar?
Both are contagious diseases.
Both infect host organisms.
Both reproduce using host cells.
Both break down food using oxygen.
Which describes a nonpoint source of pollution?
Accumulation of oil in a stream next to a gasoline station.
Chemical spill in a river next to a manufcaturing complex.
Runoff from a road into a nearby stream.
Liquid fertilizer flowing from a barrel into a stream.
Which explanation best explains the reason some insects can walk across the surface of a lake?
Water is a polar molecule, and its adhesiveness causes good capillary action.
Water is a non-polar molecule, and its cohesiveness causes good capillary action.
Water is a polar molecule, and its cohesiveness causes high surface tension.
Water is a non-polar molecule, and its high adhesiveness provides high surface tension.
Seasonal tourism can cause a shortage of the freshwater supply in some coastal areas. This can then cause coastal communities to purchase water from other sources. What does this situation describe?
economic trade-off
excess nutrient input
point source pollution
environmental stewardship
Which interaction illustrates a terrestrial-aquatic food web relationship?
A bear eating a fish in a river.
A turtle burying eggs in the sand.
A fish eating plankton in the ocean.
A bird laying eggs in a nest in a tree.
What does the hardness of water indicate?
high levels of calcium and magnesium
low levels of calcium and magnesium
increased pressure in pipelines to faucets
decreased pressure in pipelines to faucets
Water temperature and depth of water are factors that can determine the type of organisms that live in different areas of the ocean. Which other factor is most important?
currents
tides
sediments
sunlight
How does exposure to cigarette smoke contribute to an asthma attack?
By decreasing blood pressure.
By causing mutations in cells.
By irritating the respiratory tract.
By reducing insulin levels.
What makes fertilizers a benefit to the farming industry?
They increase the nutrients in soil.
They increase the growth of helpful bacteria.
They decrease the chance of bacteria growing in the soil.
They decrease the chance of plants being eaten by insects.
Which is a naturally occurring chemical?
Aspirin
Salt
Plastic
Nylon
Which element is a poor conductor of heat?
F
K
Fe
Ag
A beaker with 100 mL of water is placed on a hot plate and heated. The water boils at 100°C. At what temperature would 90 mL of water boil?
10°C
90°C
100°C
110°C
Which best explains how geologic time scales can help scientists study the evolution of life on Earth?
They describe the existence of rocks before there was life on Earth.
They show that geological features have evolved at the same rate as organisms.
They compare the life histories of species that have used rocks as habitats.
They correlate the existence of life on Earth with geological events.
Which statement supports the theory of evolution?
All living cells come from previous cells.
All plants and animals have DNA.
Matter cannot be created or destroyed during chemical reactions.
Fossils provide evidence that vertebrates share a common ancestor.
How can satellite imagery best be used after a hurricane hits the coast?
To check nearby lake depths.
To identify the amount of beach erosion.
To determine the location of sea turtles’ nests.
To map topography inland of the coastal region.
How are plant and animal cells similar?
They both have flagella.
They both have a nucleus.
They both have an eyespot.
They both have chloroplasts.
Some women who took the drug thalidomide in early pregnancy gave birth to children with severe birth defects. Which is thalidomide considered to be?
antibiotic
mutagen
vaccine
virus
What is one way scientists analyze the health of a river?
By measuring its depth.
By measuring the speed at which the river flows.
By measuring its dissolved oxygen content.
By measuring the distance the river travels to reach an ocean.
Which example best represents an interconnection between an aquatic food web and a terrestrial food web?
Fish eat insects that land on the surface of a pond.
Snakes eat bird eggs.
Bats eat mosquitoes.
Mountain lions catch and eat deer.
What is one way the government of the United States attempts to reduce pollution in the oceans?
Create new desalination plants.
Discontinue sewage treatment programs.
Increase oil and gasoline production.
Enforce laws limiting trash dumping.
Where is the majority of Earth’s freshwater located?
Clouds
Pacific Ocean
Polar ice caps
Rivers
The population density of marine life is greater along the shorelines of the ocean than farther out in the deep waters of the ocean. Which statement provides the best reason for this situation?
Ocean currents prevent many smaller marine organisms from living in deep water.
The shallow waters have fewer predators.
Coastal waters are less polluted than the deeper waters of the ocean.
There are more nutrients in shallow waters.
Which technology best monitors temperature changes in Earth’s oceans?
radar
satellites
sonar
microwave
Chemical X has a mass of 5 grams, and chemical Y has a mass of 10 grams. If the two chemicals are mixed and a complete chemical reaction takes place, what is most likely the mass of the product?
5 grams
10 grams
15 grams
50 grams
Which best describes a way to reduce a person's exposure to pesticides?
Put leftovers in the refrigerator.
Do not eat bread that has mold growing on it.
Make sure meat is thoroughly cooked before eating it.
Wash fruits and vegetables before eating them.
How can a scientist, using the Periodic Table, find an element with properties similar to another element?
By comparing density.
By finding its periodic group.
By comparing malleability.
By comparing atomic weight.
Why were some pesticides such as DDT removed from public use?
They can cause heart disease.
They can cause diabetes.
They can cause meningitis.
They can cause cancer.
The element silicon is best used for which purpose?
As a container to keep coffee hot.
As a semiconductor in computer chips.
As a material to make airplane frames.
As a malleable material for coins and jewelry.
Which is an example of a physical change.
boiling
burning
rotting
rusting
The theory of global warming is based on an increase of what atmospheric gas?
carbon dioxide
helium
hydrogen
oxygen
The Mid-Atlantic Ridge exists between the African and South American geologic plates. Which process most often occurs at the Mid-Atlantic Ridge?
Destruction of underwater mountains.
Creation of new continents.
Subduction of geologic plates.
Spreading of sea floor.
A scientist has a hypothesis that a large volcanic eruption caused a change in global temperature. Which information gained from ice cores is most useful in supporting the scientist’s hypothesis?
Levels of dissolved oxygen.
Identities of trace metals.
Estimates of natural radioactivity.
Amounts of atmospheric dust.
Which is the best method for verifying data gathered by satellites?
ground truthing
reflectance curves
satellite imagery
spectral analysis
Information about the heredity of a cell is stored in which organelle?
flagellum
mitochondrion
nucleus
vacuole
How is the cell membrane important to the process of osmosis?
It allows water to move into the cell.
It allows all materials from the outside environment to move into the cell.
It traps water and nutrients that would otherwise be unable to move into the cell.
It collects nutrients from water in the outside environment and moves them into the cell.
Which is most likely responsible for the formation of cancer cells?
An antibiotic.
A mutagen.
A bacterium.
A parasite.
Which project is most likely to interest a scientist working at a biotechnology company?
Study and reconstruction of fossilized bones.
Conservation of key species within ecosystems.
Development of genetically modified corn plants.
Prevention of sewage leaks into water supplies.
