Our Universe

What are the three types of galaxies?

• Spiral, Elliptical, Ambiguous
• Whirlpool, Ellipse, Irregular
• Spiral, Elliptical, Irregular
• Swirly, Fuzzy, Uh...

What is the definition of a solar system?

• A collection of many millions of stars

• A large ball of gas that gives off light and heat

• A star and all the objects that orbit around it

• a large round space object that circles a star in its own orbit

What is the definition of a planet?

• A collection of many millions of stars

• A large ball of gas that gives off light and heat

• A star and all the objects that orbit around it

• a large round space object that circles a star in its own orbit

What is the definition of a galaxy?

• A collection of many millions of stars

• A large ball of gas that gives off light and heat

• A star and all the objects that orbit around it

• a large round space object that circles a star in its own orbit

What is the definition of a star?

• A collection of many millions of stars

• A large ball of gas that gives off light and heat

• A star and all the objects that orbit around it

• a large round space object that circles a star in its own orbit

Which of the following is the largest?

• universe
• solar system
• galaxy
• cluster of galaxies

What does the Big Bang theory suggest?

• The universe was just there
• The Milky Way is the only solar system
• The universe is continually expanding
• The universe is collapsing in toward a single point

How is the "Big Bang" described?

• an explosion

• an expansion

• a contraction

About how long ago do scientists believe the universe began?

• 13-14 billion years ago
• 13-14 million years ago
• 12-13 billion years ago
• 12-13 million years ago

Space and all the matter and energy in it.

• Space
• Solar System 
• Universe
• Sun