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8th grade Science EOG Review Flashcards | StudBud
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8th grade Science EOG Review
8th grade Science EOG Review
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A #science review for the NC 8th grade EOG
Flashcards
40 cards
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Questions
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Answers
1
In which oceanic zone do clams and crabs survive by burrowing in the sand?
oceanic
open ocean
deep ocean
intertidal
2
How does smoking most likely have a negative impact on ability to succeed at physical activity?
It decreases the ability to make decisions rapidly
It interferes with balance and coordination
It decreases the speed and power of muscle contractions
It decreases stamina and cardiovascular efficiency
3
Which is a possible disadvantage of using flowing water to produce electricity?
reduced carbon dioxide emission
creates reservoirs
only suitable for industrial use
ecosystem damage and loss of land
4
Which statement best explains how periods on the periodic table are organized?
decreasing atomic mass number from ;eft to right
increasing atomic number from left to right
increasing number of neutrons from left to right
decreasing number of electrons from left to right
5
Which is the best example of a pure substance?
air
gold
peanuts
milk
6
Chemical reaction starts with 6 atoms of carbon how many atoms of carbon will be in the product
6 atoms of carbon
2 atoms of carbon
12 atoms of carbon
3 atoms of carbon
7
Wolves eat deer, what happens to deer population if wolves are taken from area where deer live?
The population of deer will increase
The population of deer will decrease
The population of deer will remain the same
The population of deer will become extinct
8
What shows one example of a physical change and one example of a chemical change?
resting iron and baking a cake
freezing water and burning coal
dissolving powder and burning coal
boiling water and melting wax
9
What do transitional fossils best support?
The Theory of Continental Drift
The Theory of Geological Evolution
The Law of Superposition
The Theory of Biological Evolution
10
Which of these careers would a student studying biotechnology most likely pursue?
geology
agricultural research
electric engineering
astronomy
11
What type of relationship exists between trees and kudzu vines that starve them from sunlight?
mutualism
parasitism
predator-prey
competition
12
Which would best allow a species to survive environmental changes?
genetic diversity
small population
similar physical features
low mutation rate
13
Which would be
least likely
have an impact on the global climate change?
producing energy using oil
producing energy using coal
producing energy using hydroelectric plants
producing energy using natural gas
14
Why do doctors suggest that people get the flu vaccine every year?
Viruses replicate more rapidly over time
Viruses can mutate from year to year
Vaccines get stronger over time
Vaccines are absorbed by the body after a year
15
What could help a scientist determine the approximate age of dinosaur bones?
the weather conditions in the area of the bones
the birds living in the area of the bones
the index fossils in the area of the bones
the kinds of trees living in the area of the bones
16
Which best explains the importance of nitrogen in the cycling of energy and matter?
Nitrogen increases protein production in plants
Nitrogen increases the effectiveness of photosynthesis
Nitrogen decreases protein production in plants
Nitrogen decreases the effectiveness of photosynthesis
17
How does a balanced chemical equation satisfy the Law of Conservation on Mass?
During a chemical reaction, matter is destroyed.
During a chem. reaction. one or more substances are formed
During a chem. reaction, the total number of atoms increases
During a chem.reaction, the amount of matter stays the same
18
Why is a healthy diet important?
It maintains a constant body temperature
It prevents damage to internal organs
It makes oxygen for all the cells in the body
It supplies the body's needs for growth and energy
19
Which best determines the number of wolves that can live in an area?
the amount of food available in the area
the number of trees in the area
the number of birds that live in the area
the amount of snow in the area each year
20
Scientists think dolphins and whales might've evolved from same ancestor? What supports this?
The live in the same area of the ocean
They swim the same way
They eat the same food
They have similar anatomies
21
Where do plants get most of the energy they need to live and grow?
sunlight
air
soil
water
22
Why is water from an aquifer more likely to be cleaner than water from other sources?
because it receives water directly from precipitation
because it forms where fresh and salt water meet.
because it rises to the surface near the ocean
because pollutants are filtered by rock & soil within Earth
23
Dinosaur fossils are found below mammal fossils in rock layers. What can best be concluded?
Dinosaurs ate plants
Dinosaurs lived on Earth before mammals
Dinosaurs were eaten by mammals
Dinosaurs and mammals lived at the same time
24
Which is an example of a renewable resource?
gas
oil
biomass
coal
25
What happens to water molecules during the boiling process?
They move faster and move farther apart as they lose heat
They move faster and move farther apart
Move more slowly but move farther apart as they lose heat
Move faster and remain close together as they absorb heat
26
Which is a way agricultural biotechnology industry could have a positive impact on environment
be reducing the need for countries to import food
by increasing the use of wind farms that produce electricity
by making robots to replace large farm machines
by producing crops that are virus resistant
27
10 people became sick with the flu after attending a school dance. How did the people get sick?
contact with an infected person
contact with a contaminated object
contact with an infected animal
contact with environmental sources
28
In winter, the fur of arctic fox is white. In summer, it darkens to reddish brown. Why?
the amount of sunlight present
the fox's age
the fox's habitat
the fox's genes
29
Which will most likely result if there is an upwelling in a coastal area?
higher water temperatures
fewer nitrates
more aquatic life
less nutrients in the water
30
Which of these organisms is a producer in a marine ecosystem?
gull
algae
fish
worm
31
Why is the total mass of the product < the total weight of the reactant after chemical reaction
Gases were released to the atmosphere
A physical change occurred
Atoms involved in the reaction lost mass
Precipitates were created in the new solution
32
What will most likely happen to the molecules in an ice cube as it is heated?
The molecules will begin to move slower
The molecules will begin to move faster
The molecules will begin to increase in density
The molecules will begin to condense in the air
33
Which pair of elements has the most similar properties?
I and Ca
N and P
K and He
Li and B
34
Consider the food web. What is the largest amount of energy found in this food web.
hawk
frog
grass
grasshopper
35
What happens to a population and to competition when there is a reduction of living space?
Competition weakens and population decreases
Competition strengthens while the population contracts
The population increases as competition deceases
The population expands and competition intensifies
36
Which
best
determines the health of a lake used as a source of freshwater?
its depth and width
its temperature and pH
its temperature and depth
its location and depth
37
Which
best
describes how ice cores are important to the study of geologic history?
hold index fossils, used to date the different ice cores
Follow the Law of Superposition
is evidence of changes in atmospheric composition over time
they show unconformities, which signal changes in deposition
38
Lions and cats are part of same family but their sizes are very different. What is the cause?
habitat size
behavioral makeup
biochemical makeup
genetics
39
Which is the best way to help prevent the flu from becoming a pandemic?
washing hands often
getting a vaccination
taking antibiotics
eating fruits and vegetables
40
If a body of water has high turbidity levels, what can most likely be concluded?
It is too hot to drink
It has a low pH
It contains a lot of chemicals
It is unsafe to drink
