Science Unit 3 Review

The Big Bang

100

The universe is approximately:

A. 14 thousand years
B. 14 million years
C. 14 billion years
D. 14 trillion years

C. 14 billion years old

200

Light from distant galaxies appears:

A. Brighter
B. Dimmer
C. Blue shifted
D. Red shifted

D. Red shifted

300

What is a result of the Big Bang?

A. Galaxies moving closer
B. Galaxies moving farther away
C. Galaxies are still
D. Moving randomly

B. Galaxies moving farther away

400

How do scientists know the universe is expanding?

A. Blue shift
B. Green shift
C. Red shift
D. Yellow shift

C. Red shift

500

Why does red shift happen?

A. Light speeds up
B. Light slows down
C. Light stretches
D. Light disappears

C. Light stretches

Galaxies

100

A cloud of dust and gas is called:

A. Asteroid
B. Nebula
C. Galaxy
D. Solar system

B. Nebula

200

A nebula is mostly made of:

A. Hydrogen & Oxygen
B. Hydrogen & Helium
C. Helium & Oxygen
D. Carbon & Oxygen

B. Hydrogen & Helium

300

Elliptical means:

A. Square
B. Rectangle
C. Oval
D. Bar

C. Oval

400

The Milky Way is a:

A. Elliptical galaxy
B. Irregular galaxy
C. Barred spiral galaxy
D. Ring galaxy

C. Barred spiral galaxy

500

Nebulas can form:

A. Black holes only
B. Stars and solar systems
C. Only planets
D. Only comets

B. Stars and solar systems

Solar System

100

The solar system formed from:

A. Planets
B. Comets
C. Black hole
D. Dust and gas cloud

D. Dust and gas cloud

200

The formation theory is called:

A. Big Bang Theory
B. Nebular Theory
C. Gravity Theory
D. Expansion Theory

B. Nebular Theory

300

What formed at the center of the solar system?

A. Earth
B. Jupiter
C. Sun
D. Moon

Sun

400

Between Mars and Jupiter is:

A. Sun
B. Asteroid belt
C. Galaxy
D. Black hole

B. Asteroid belt

500

The asteroid belt separates:

A. Sun and stars
B. Earth and Moon
C. Inner and outer planets
D. Galaxies

C. Inner and outer planets

Gravity & Motion

100

When objects get closer, gravity:

A. Increases
B. Decreases
C. Stays the same
D. Disappears

Increases

200

When objects move farther apart, gravity:

A. Increases
B. Decreases
C. Stays the same
D. Fluctuates

Decreases

300

Planetary orbits are:

A. Circular
B. Square
C. Elliptical
D. Random

C. Elliptical

400

Which planets have elliptical orbits?

A. Earth
B. Mars
C. Jupiter
D. All of these

Earth
Mars
Jupiter

500

What keeps planets in orbit?
A. Speed
B. Gravity
C. Light
D. Air

B. Gravity

Space Measurements

100

A light-year measures:
A. Time
B. Speed
C. Distance
D. Energy

C. Distance

200

A light-year is about:
A. 5,866 miles
B. 5 million miles
C. 5.866 trillion miles
D. 500 miles

C. 5.866 trillion miles

300

Light from Alpha Centauri takes:
A. 4 days
B. 4 weeks
C. 4 months
D. 4 years

D. 4 years

400

Seasons are caused by:
A. Distance from Sun
B. Earth’s tilt
C. Moon phases
D. Rotation

Earth’s tilt

500

Seasons are NOT caused by:
A. Tilt
B. Orbit
C. Distance from Sun
D. Sunlight angle

C. Distance from Sun