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2021 (v202) Grade 8 Intermediate-Level Science Test Questions 21-30
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 data table shows the years when Halley’s Comet was closest to the Sun, making it visible to observers on Earth.
1) Based on the data table, the next year when Halley’s Comet will most likely be visible to an observer on Earth would be
A
2043
B
2061
C
2136
D
2022
Helpful Hint
The data table shows the years when Halley’s Comet was closest to the Sun, making it visible to observers on Earth.
2) The reason that Halley’s Comet can be seen during specific years is that
A
the orbit of Halley’s Comet is controlled by Earth’s gravity
B
Halley’s Comet orbits Earth in a cyclic and predictable pattern
C
Halley’s Comet orbits the Sun in a cyclic and predictable pattern
D
the orbit of Halley’s Comet is a perfect circle
3) The Moon completes the cycle of phases from one Full Moon to the next Full Moon in approximately one
A
year
B
day
C
month
D
week
Helpful Hint
The diagram below represents Earth’s polar and equatorial diameters, measured in kilometers (km).
4) The shape of Earth is best described as
A
nearly spherical because the equatorial diameter is the same as the polar diameter
B
nearly spherical because the equatorial diameter is slightly larger than the polar diameter
C
perfectly spherical because the equatorial diameter is the same as the polar diameter
D
perfectly spherical because the equatorial diameter is slightly larger than the polar diameter
5) Snowfl akes are seen melting as they fall through the air. This melting occurs because the snowflakes
A
lose heat and the surrounding air gains heat
B
gain heat and the surrounding air gains heat
C
lose heat and the surrounding air loses heat
D
gain heat and the surrounding air loses heat
Helpful Hint
The diagram below represents Earth’s layers, labeled A through D.
6) Which letter represents the outer core?
A
A
B
D
C
C
D
B
7) The freezing point of a substance is the temperature at which the substance changes from
A
gas to liquid
B
liquid to solid
C
liquid to gas
D
gas to solid
8) Which item is too small to be seen with a compound microscope?
A
a grain of salt
B
an onion cell
C
an atom of iron
D
a human hair
9) Which property can be used to help identify many minerals?
A
solubility
B
temperature
C
streak
D
size
Helpful Hint
The darkly shaded areas of the map represent regions with a high potential for earthquakes to occur. Letters A through D represent locations on Earth.
10) Earthquakes that occur on the ocean fl oor may produce tsunamis, which are large ocean waves that can fl ood coastal locations. Which location is most likely in the greatest danger from a tsunami?
A
C
B
A
C
B
D
D
*select an answer for all questions
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