Big Bang Theory

The Big Bang refers to the origin of which of the following?

• Earth

• Our Solar System

• The Milky Way galaxy

• The Universe

What evidence exists to support the Big Bang Theory?

• Earth orbits the Sun.

• Earth rotates on its axis.

• The universe is still constantly expanding.

• All objects in the universe are always growing.

Scientists have documented that galaxies they observe seem to be moving farther away. Which concept BEST explains this?

• Black holes because an unseen force is pulling objects away from the center of the universe.

• Big Bang Theory because the universe exploded from a single point in space and is always expanding.

• Gravitational Force because objects are being drawn toward the edges of the universe.

• Solar system because the mass of the Sun pushes other galaxies away.

Evidence supports the idea that the universe has been expanding since its birth in the big bang. Consider a model of the universe shaped like an expanding round balloon. Where would you expect to find the oldest objects in this model of the universe.

• At the edge of the balloon.

• At the center of the air in the balloon.

• Scattered randomly throughout the air in the balloon.

• Halfway between the center of the balloon and its edge.

Which of these experiments would BEST replicate the big bang theory?

• Dropping fragments of metal into a magnetized box.

• Turning on an underwater speaker in a water tank.

• Exploding a tightly packed substance inside a vacuum.

• Shaking sand particles in a mixture of oil and water.