AnswersOC27 EarthSpace Sci-2001310-S2-NelsonUnit Test

Unit 6: Test Answers

0 verified answers2 views
41
Free Preview

Which is one piece of information that astronomers use to calculate the age of the universe?

A
dark energy
B
the age of rocks on Earth
C
the current motion of inner planets
D
patterns of background radiation
42
Free Preview

This chart shows characteristics of three different types of waves.Which statement is best supported by the information in the chart?

Question illustration
A
Wave X and Wave Y are mechanical waves, and Wave Z is an electromagnetic wave.
B
Wave X and Wave Y are electromagnetic waves, and Wave Z is a mechanical wave.
C
Wave X and Wave Z are electromagnetic waves, and Wave Y is a mechanical wave.
D
Wave X and Wave Z are mechanical waves, and Wave Y is an electromagnetic wave.
43

What causes a star to shine brightly?

A
the color that is produced
B
the energy that is released
C
the amount of gravity that is present
D
the types of elements that are present
44

Which is currently the most supported theory about the future of the universe?

A
The universe could remain exactly as it is today.
B
The universe may continue to expand.
C
Stars could burn out, causing the universe to become dark and cold.
D
Gravity could pull galaxies back together, causing a reverse of the big bang.
45

What would most likely cause the future acceleration of the expansion of the universe?

A
radiation from the Sun
B
the existence of background radiation
C
the continued existence of dark energy
D
light shifts identified by the Doppler effect
46

The local newspaper has published the passage below.Last week, scientists released incredible images of aurora australis, known as the northern lights. The images show a beautiful display of lights. These lights are the result of the solar activity known as solar wind. The particles of the solar wind flow along the lines of Earth’s magnetic field and collide with gas atoms in Earth’s atmosphere. Light is given off as a result of these collisions. Traces of solar wind reach well beyond Earth and have been detected as far as Saturn.Which statement is inaccurate?

A
Solar wind particles flow along the lines of Earth’s magnetic field.
B
Light is given off when solar wind particles and gas atoms collide.
C
The aurora australis is known as the northern lights.
D
Solar winds reach well beyond our planet.
47

Which correctly lists the two elements that make up the empty space in the universe?

A
ice and debris
B
debris and dark matter
C
dark matter and dark energy
D
dark energy and dust

Did you find these answers helpful?

More from this Course

Quiz
5 verified answers

Unit 9 Test

Assignment
24 verified answers

Lesson 6.3 Origin and Evolution of the Universe

Assignment
17 verified answers

Lesson 8.3 Electromagnetic Waves

Unit 6: Test Answers — OC27 EarthSpace…