Earth in Space (8th grade science)

Model the Scale of solar system

Model the Scale of space

Models to represent the Big Bang

Models of Waves

Anyone else know?????

About how many years ago did the universe begin?

13.8 billion years ago

The big bang theory states that 13.8 billion years ago…

the universe began from a single, extremely hot, and dense point, which then rapidly expanded.

What four things did the big bang create?

Space, Time, Matter, and Energy

What’s a better name for the big bang?

The Big Expansion

What are the two main pieces of evidence that support the big bang theory?

Redshift and Cosmic Microwave

What is the Doppler effect?

Change in wave frequency caused by motion between wave sources and observer.

• High frequency waves when closer

• Low frequency waves when further

What happens to light coming from distant galaxies?

it gets stretched because they are moving away from us.

What color do light waves appear when as they stretch?

Red

In 1920, who observed that galaxies are moving away from us?

Edwin Hubble

What is Hubble’s Law?

The further away a galaxy is, the faster it is moving away  (v=H_0​d)

What are the two most common elements in the universe?

Hydrogen and Helium

What two people discovered discovered radiation coming from every direction in space?

Arno Penzias and Robert Wilson

What is CBM?

Faint glow of leftover radiation from the Big Bang

_______ waves from the big bang have cooled and stretched into _______ that still exist today.

Radiation, Microwaves