Science Big Bang Theory

How long ago did the Big Bang occur?

13.8 billion years ago.

Did the universe explode?

No the universe expanded and its still expanding now.

Light

Energy in the form of a wave

What are waves made up of?

Photons

Photons

Masseles Particles

What is light produced by?

Stars

What is a reflection?

When a wave bounces of a surface from one medium to another.

What is a medium?

Something light hits which it either absorbs the light or lets it pass through.

Refraction

The changing direction of a wave when it passes from one medium to another.

Distortion

Change

Transparency

When light passes through an object without distortion(change).

Absorption

A process where a medium takes in light and converts into energy.

How fast is light?

Speed of light (C)

670,000,000,000 mph

Light can travel around earth 7.5 times in 1 second.

Wavelength

The distance of 1 complete wave from one crest to the other.

Frequency

How often a wave passes a location per second

(H2)

If there are more waves what does that mean?

More Energy

Amplitude

The height of a wave

Electromagnetic Spectrum

A chart that organizes all forms of light.

What is white light?

All of the colors combined

Can we read light?

yes

Direct Relationship

When the graph increases over time.

What do stars produce?

Light

What do Lines on a spectrum tell us?

The elements in the star?

Continuous spectrum

Entire Light spectrum

Absorption Spectrum

The continuous spectrum with some lines cut out which represents the colors that gas or stars absorbs

Emission Spectrum

The continuous spectrum with some lines cut out which represents the colors that gas or stars lets out.

Doppler Effect

The apparent change of a wave due to movement

Red Shift

When an object is moving away from another

Blue Shift

When an object is moving towards another

What does speed have to do with an object’s distance from another

Further away objects are the faster they are moving

Is there a center to the expansion?

No

How do we know that the universe is most likely infinite.

Red Shift

Astronomical Unit

Unit to measure our Solar Sytem

Light Year

Distance Light travels in a year

Not a speed or time

Astronomical Units

Measuring system for distance in our solar system

Singularity

Infinitely small, massive, dense, temperature