Space Technology — Unit test Answers

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1
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Which is a type of star system?

A
dim stars
B
solar system planets
C
wobbling stars
D
globular clusters
2
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The sudden eruptions of energy from a small area of the Sun’s surface are known as

A
solar flares.
B
sunspots.
C
prominences.
D
solar winds.
3

Which is a future NASA research project?

A
using a probe to collect data
B
conducting research from a space station
C
collecting samples on an asteroid
D
conducting a space mission with no people
4

Which discovery did Galileo make to support the theory that the planets, including Earth, orbit the Sun?

A
Venus has phases.
B
The orbits of the planets are elliptical
C
Earth’s rotation causes the Sun to rise in the sky.
D
The planets move faster when they orbit closer to the Sun.
5

Which is one physical property that all stars have?

A
They are made of gases.
B
They shine very brightly.
C
They have a triangle shape.
D
They contain iron in their cores.
6

Which action would best demonstrate that a scientist is being creative?

A
using prior knowledge to solve problems
B
requiring evidence and thinking logically
C
taking a closer look at the natural world
D
following strict rules when using human test subjects
7

Which quantity does a light-year measure?

A
distance
B
speed
C
time
D
volume
8

Which term defines a star system with two stars?

A
binary star system
B
eclipse star system
C
open cluster star system
D
globular cluster star system
9

Which statement correctly describes terrestrial planets?

A
They are made of mostly rock.
B
They are made of gases.
C
They are small objects of ice and dust.
D
They are very large compared to other planets.
10

Why are there two high tides a day about 12 hours apart from each other?

A
Earth revolves around the Sun once during that time.
B
Earth rotates entirely on its axis once during that time.
C
The moon revolves around Earth once during that time.
D
The moon’s orbit is in line with Earth’s orbit twice a day.
11

Students from a high school science class visited the desert of Southern California and investigated a sample of sedimentary rock from the region.Which question can they answer through scientific investigation?

A
Which fossils are found in different layers of sedimentary rock?
B
Why are sedimentary rocks prettier than other kinds of rocks?
C
Which layers of a sedimentary rock have the most interesting fossils?
D
Why should scientists study sedimentary rocks?
12

The line graph shows the change in sea level over time.

Question illustration
A
Sea level will consistently increase.
B
Sea level will stay consistent at about nine inches.
C
Sea level will fluctuate slightly but will increase overall.
D
Sea level will change slightly but will decrease overall.
13

What was discovered in 1965 and is believed to be leftover thermal energy from the big bang?

A
red shift
B
the Eagle Nebula
C
the Doppler effect
D
background radiation
14

Which is the final event that occurs when a star is forming?

A
The outer layer of the star expands.
B
Gravity pulls gas and dust together.
C
A black hole forms as the core collapses.
D
Nuclear fusion begins under high pressure.
15

Which component does a descriptive investigation include?

A
observations
B
control group
C
comparisons
D
hypothesis

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