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NC 8th Grade EOG Review 2
Test Description: EOG Review
Instructions: Answer all questions to get your test result.
1) Which pair of elements has the most similar properties?
A
K and He
B
Li and B
C
I and Ca
D
N and P
2) If a chemical reaction such as photosynthesis begins with 6 atoms of carbon (C), how many atoms of carbon (C) should be in the products?
A
6 atoms of carbon (C)
B
3 atoms of carbon (C)
C
2 atoms of carbon (C)
D
12 atoms of carbon (C)
3) Which is a possible disadvantage of using flowing water to produce electricity?
A
only suitable for industrial use
B
creates reservoirs
C
ecosystem damage and loss of land
D
reduced carbon dioxide emission
4) Why is water from an aquifer more likely to be cleaner than water from other sources?
A
because it rises to the surface near the ocean
B
because pollutants are filtered by rock and soil deep within Earth
C
because it receives water directly from precipitation
D
because it forms where fresh and salt water meet
5) In which oceanic zone do clams and crabs survive by burrowing in the sand?
A
deep ocean
B
oceanic
C
intertidal
D
open ocean
6) If a body of water has high turbidity levels, what can most likely be concluded?
A
It has a low pH.
B
It is too hot to drink.
C
It is unsafe to drink.
D
It contains a lot of chemicals.
7) Scientists find dinosaur fossils in the bottom rock layers of a cliff and mammal fossils in the middle rock layer of the cliff. Which could best be concluded from this evidence?
A
Dinosaurs lived on Earth before the mammals.
B
Dinosaurs and mammals lived at the same time.
C
Dinosaurs were eaten by the mammals.
D
Dinosaurs ate plants.
8) Ten people became sick with the flu after attending a school dance. What is the scenario that could best explain how the people got sick?
A
contact with an infected animal
B
contact with a contaminated object
C
contact with environmental sources
D
contact with an infected person
9) Which is the best way to help prevent the flu from becoming a pandemic?
A
getting a vaccination
B
eating fruits and vegetables
C
washing hands often
D
taking antibiotics
10) Which best explains the importance of nitrogen in the cycling of energy and matter?
A
Nitrogen decreases the effectiveness of photosynthesis.
B
Nitrogen decreases protein production in plants.
C
Nitrogen increases the effectiveness of photosynthesis.
D
Nitrogen increases protein production in plants.
11) Which is a way the agricultural biotechnology industry could have a positive impact on the environment?
A
by producing crops that are virus resistant
B
by increasing the use of wind farms that produce electricity
C
by reducing the need for countries to import food
D
by making robots to replace large farm machines
12) If wolves prey on deer for food, what will most likely happen to the deer population if wolves are removed from an area where deer live?
A
The population of deer will remain the same.
B
The population of deer will increase.
C
The population of deer will become extinct.
D
The population of deer will decrease.
13) Where do plants get most of the energy they need to live and grow?
A
soil
B
sunlight
C
air
D
water
14) Scientists think that dolphins and whales may have evolved from a common ancestor. What evidence supports this hypothesis?
A
They swim the same way.
B
They live in the same area of the ocean.
C
They eat the same food.
D
They have similar anatomies.
15) In the winter, the fur of the arctic fox is white. In summer, the fur darkens to a reddish brown. What most likely causes the fur of the fox to change color?
A
the fox’s genes
B
the fox’s age
C
the amount of sunlight present
D
the fox’s habitat
16) Which would best allow a species to survive environmental changes?
A
genetic diversity
B
similar physical features
C
low mutation rate
D
small population
17) How would smoking tobacco most likely have a negative impact on the ability of an individual to succeed at physical activities?
A
It decreases stamina and cardiovascular efficiency
B
It decreases the speed and power of muscle contractions
C
It interferes with balance and coordination
D
It decreases the ability to make decisions rapidly
18) Which shows one example of a physical change and one example of a chemical change?
A
freezing water and burning coal
B
boiling water and melting wax
C
rusting iron and baking a cake
D
dissolving powder and shredding paper
19) How does a balanced chemical equation satisfy the Law of Conservation of Mass?
A
During a chemical reaction, the total number of atoms increases.
B
During a chemical reaction, matter is destroyed.
C
During a chemical reaction, the total amount of matter stays the same.
D
During a chemical reaction, one or more new substances are formed.
20) Which is a problem with using wind turbines to produce energy?
A
Wind turbines are efficient only in certain areas
B
Wind turbines occupy a small area of land
C
Wind turbines produce a large amount of energy
D
Wind turbines create a large amount of pollution
*select an answer for all questions
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