Universe Mr. Skirbst Physical Science Topic 24. Watch Videos: VIDEO: The Universe CLIP: Understanding the Universe CLIP: Early Theories about the Universe.

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Presentation transcript:

Universe Mr. Skirbst Physical Science Topic 24

Watch Videos: VIDEO: The Universe CLIP: Understanding the Universe CLIP: Early Theories about the Universe CLIP: Matter & Energy

Universe Big Bang Theory - the belief that the universe began with an explosion from a single point containing all the matter of the present universe

Universe Big Bang Theory - states that the universe is currently expanding in all directions

Universe Doppler Effect - apparent change in wavelength due to the movement of an object ht/dopplershift.html

Doppler Effect Red Shift - spectrum shifted to red - indicates movement AWAY from an observer

Doppler Effect Blue Shift - spectrum shifted to blue - indicates movement TOWARD an observer

Features of the Universe Constellations - groups of stars that appear to form patterns in the sky

Features of the Universe Galaxies - major feature of the universe - huge collection of billions of stars

3 Types of Galaxies 1. Spiral - shaped like a pinwheel You are here!

3 Types of Galaxies 2. Elliptical - varies from spherical to disk-like

3 Types of Galaxies 3. Irregular - no definite shape

Gravity - Force holding galaxies together - Matter “clumped” together by gravity

Calculating Gravity G = 4 pi 2 L / T 2 pi = 3.14 L =.5m T = 1.4 sec where: