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2019 Grade 8 Intermediate-Level Science Test Questions 11-20
Test Description: Use your knowledge of Science to answer all questions. Good Luck.
Instructions: Answer all questions to get your test result.
Helpful Hint
The graphs show the populations of rabbits with four different fur colors in one area. Graph A represents the population of rabbits 10 years ago. Graph B represents the population of rabbits today.
1) At the end of the 10-year period, which color of rabbit appears to be best adapted to its environment?
A
tan
B
white
C
gray
D
black
Helpful Hint
The graphs show the populations of rabbits with four different fur colors in one area. Graph A represents the population of rabbits 10 years ago. Graph B represents the population of rabbits today.
2) Variations in traits, such as the fur color of rabbits, may be caused by
A
a decrease in air pollution
B
adequate resources
C
sexual reproduction
D
dynamic equilibrium
Helpful Hint
The diagram below represents changes in the types of plants growing in the same area during four different time periods. Different types of plants have been labeled for each time period.
3) This change in plant types over time is an example of
A
urban growth
B
selective breeding
C
genetic engineering
D
ecological succession
Helpful Hint
The diagram below represents the life cycle of a frog.
4) This diagram shows that, in frogs,
A
methods of sexual reproduction depend on the species
B
offspring always look like the adult
C
metabolism is the sum of all chemical reactions
D
body structures change during development
Helpful Hint
The diagram below represents a partial food web.
5) Which organisms in this food web decompose materials and recycle wastes?
A
bacteria
B
foxes
C
mice
D
green plants
6) All of the plants and animals living in the same area make up a
A
community
B
population
C
habitat
D
species
7) Which change would most likely cause a decrease in the number of squirrels living in an area?
A
a decrease in competition between the squirrels
B
an increase in available food
C
an increase in the number of forest fires
D
a decrease in the number of predators
Helpful Hint
The passage below describes how a catalytic converter in a car works. 'How a Catalytic Converter Works' - Gases produced by a car’s engine flow through the catalytic converter, which contains metals. These metals start a chemical reaction that makes the gases released by the car less harmful to the environment.
8) The catalytic converter most likely was developed in response to
A
the demand for more energy-efficient cars
B
the demand for increased car engine power
C
a need for lower-priced cars
D
a need for lower-priced cars
9) The formation of rock fragments and soil is most likely the result of
A
convection cells
B
weathering
C
hazardous weather
D
gravity
10) All matter is made up of
A
cells
B
compounds
C
molecules
D
atoms
*select an answer for all questions
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