Answers2001310 Earth Science Sem 1 - PearsonThe Expanding Universe

The Expanding Universe Answers

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Which statements describe the principles of the big bang theory? Select two options.

A
The universe is continuing to expand.
B
The universe stretched from a single point.
C
The universe resulted from the collision of light and dark energy.
D
The universe expanded, but its size is now remaining constant.
E
The universe is slowly collapsing and getting smaller.
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4

Hubble measured the velocity of the movement of galaxies by using . Hubble’s law states that galaxies located farthest from the center of the universe than those closest to the center.

Answers:
Selection 1:the Doppler effect
Selection 2:are moving faster
5

After our solar system began to form, dust and gas combined into small bodies that formed the planets. What are these small bodies called?

A
dwarf planets
B
gas giant planets
C
planetesimals
D
terrestrial planets
6

Use the drop-down menus to identify the order of these images for the formation of our solar system.

Answers:
Selection 1:2
Selection 2:1
Selection 3:3
7

Imagine you are an astronomer who recently discovered a new planet orbiting a distant star.Which set of characteristics would you use to classify this planet as an inner or terrestrial planet? Check all that apply.

A
dense and solid
B
very large
C
thick atmosphere containing hydrogen and helium
D
lacking a solid surface
E
located near a star
8

Why is Jupiter so much larger than Earth? Check all that apply.

A
Inner planets were created at higher velocities.
B
Outer planets have less gravity than inner ones.
C
Outer planets attracted helium, hydrogen, and other gasses.
D
Inner planets formed where temperatures were cooler.
E
Gases escaped from inner planets and not from outer ones.
9

Which statements explain current theories about dark energy and dark matter? Check all that apply.

A
Space that appears empty actually contains dark energy and dark matter.
B
Dark matter does not emit electromagnetic radiation.
C
Scientists believe dark energy will cause the universe to collapse inward to a single point.
D
Scientists theorize that dark energy is causing the expansion of the universe to accelerate.
E
Dark matter includes all of the dust, ice, and debris that scientists observe in black holes.
10

Which hypothesis is most supported by astronomers?

A
The universe is currently expanding and will continue to expand.
B
Stars could burn out, causing the universe to become dark and cold.
C
Gravity could pull galaxies back together, causing a reverse of the big bang.
D
Dark energy will pull the universe together to form a massive black hole.
11

Which statements describe processes involved in the accretion of planetesimals and protoplanets? Check all that apply.

A
Both involve the melting of solid materials in the nebula.
B
Both involve the formation of solid particles from nebular materials.
C
Both involve the work of the gravitational push on nebular materials.
D
Both involve the trapping of gases and the clumping of masses of matter.
E
Both involve the growing of gas grains with the addition of atoms and molecules.
12

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