2018 Grade 8 Intermediate-Level Science Test Questions 31-45 Question Preview (ID: 59902)

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Which layer of Earth’s atmosphere contains the highest concentration of ozone?

a) middle stratosphere

b) lower stratosphere

c) upper troposphere

d) lower troposphere

The plunge pool at the bottom of the waterfall was formed mainly by

a) deposition

b) evaporation

c) precipitation

d) erosion

What is the main source of energy for the water cycle?

a) the Moon

b) the Sun

c) winds

d) oceans

Which statement best explains why Lystrosaurus fossils are found on these two continents?

a) This dinosaur could fly to distant locations.

b) Both continents were once joined together.

c) Predators transported the remains of this dinosaur between continents.

d) Glaciers transported the fossils to the two continents.

A student correctly determined the density of two rocks. If the volumes of the two rocks are equal, the rock with the greater density has a

a) rounder shape

b) smoother surface

c) greater mass

d) smaller size

Which terms best describe the properties of a gas?

a) definite volume and a definite shape

b) definite volume and no definite shape

c) no definite volume and a definite shape

d) no definite volume and no definite shape

Low-pressure systems generally move across the United States from

a) north to south

b) east to west

c) west to east

d) south to north

Which process was responsible for the displacement of the horizontal rock layers?

a) folding

b) faulting

c) tilting

d) weathering

Which event is an example of a physical change?

a) iron rusting

b) fireworks exploding

c) eggs cooking

d) ice melting

Based on its position in the Periodic Table, at room temperature, cadmium is most likely a

a) noble gas

b) nonmetal

c) metal

d)

Ammonia gas would be classified as

a) a compound

b) a mixture

c) an element

d) an atom

In this reaction, the mass of CaCO3

a) is less than the mass of CaO plus the mass of CO2

b) is greater than the mass of CaO plus the mass of CO2

c) equals the mass of CaO plus the mass of CO2

d) equals the mass of CaO minus the mass of CO2

What is the wind-chill temperature when the surface air temperature is 10°F and the wind speed is 20 mph?

a) -41°F

b) -9°F

c) 9°F

d) 4°F

Which two simple machines are parts of the wheelbarrow?

a) a lever and a pulley

b) a lever and a wheel and axle

c) an inclined plane and a pulley

d) an inclined plane and a wheel and axle

According to this diagram, metamorphic rock is formed by

a) melting and solidification

b) burial and compaction

c) weathering and erosion

d) heat and/or pressure

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