Structure of the Universe Study Set

Order of structures in the universe from largest to smallest.

• Galaxy

• Planetary System

• Universe

• Stars and Planets

A light year is equal to what distance?

• 9.46 x10¹² km or 600 trillion miles

• 100,000 to 120,000 km

• One astronomical unit

• 400,000 trillion miles

Our Sun is a ​ (a)   .

• A Red Giant

• A Supergiant

• A White Dwarf

• Main Sequence Star

A (a)   is hot, small, dense, and nearly dead star.

• A Red Giant

• A Main Sequence Star

• A Supergiant

• White Dwarf

What is Dark Energy responsible for in the universe?

• The orbit of planets around a star

• The composition of planetary systems

• The birth of stars

• The universe’s expansion

Which of the following is true about White Dwarf stars?

• White Dwarfs are hotter and dimmer than main sequence stars.

• White Dwarfs are cooler and brighter than main sequence stars.

• White Dwarfs have the same temperature and brightness as main sequence stars.

• White Dwarfs are cooler and dimmer than main sequence stars.

What is the difference between a meteoroid, meteor, and meteorite?

Groups:

(a) Meteoroid

,

(b) Meteor

,

(c) Meteorite

• A small rocky object that is traveling through space

• A small rocky object that enters Earth's atmosphere and burns up before it can reach the surface

• A small rocky object that enters Earth's atmosphere and impacts the surface, causing a crater

Label the life cycle of average and massive stars.

a

b

c

d

e

f

g

h

i

j

White Dwarf

Average Star

Supergiant

Red Giant

Massive star

Black Hole

Planetary Nebula

Neutron Star

Stellar Nebula

Supernova

Place the following definitions with their correct terms.

Groups:

(a) Dark Matter

,

(b) Dark Energy

,

(c) Ordinary Matter

• Made up of protons, neutrons, and electrons to form atoms

• A hypothetical energy believed to "push" against the pull of gravity

• A hypothetical substance that exerts gravity and affects the path of starlight heading to Earth

• All matter that you can see and are familiar with

• Responsible for "gravitational lensing"

• Responsible for the expansion of the universe

Match the definitions to their correct terms below.

• A bright, shining sphere or plasma

• Comet

• A small, rocky object orbiting the sun

• Moon

• An icy object, produces a coma and tail

• Planet

• A spherical object orbiting a star

• Asteroid

• A "natural satellite" orbiting a planet

• Star