Do First

Questions1. Name a career that uses Earth and Space

Science.

Earth Systems

Earth Systems

• Study of Earth and its neighbors in space

• Geology (“ study of Earth”) course– Geochemistry– Geophysics– Geobiology– Paleontology– Oceanography– Meteorology– Astronomy

Earth Systems

• Careers that involve Earth Systems include– Seismologist– Meteorologist– Commercial Diver– Archaeologist– Astronomer– ….

The Big Bang Theory

• 13.7 billion years ago, the universe began expanding from a tiny hot dense state

• As the universe expanded it cooled enough that other things could form

• The universe is still expanding in every direction at the same rate

• The Big Bang was not an explosion, even though the name implies this

Misconception

False

True

Expansion

The nebular hypothesis

• The nebular hypothesis suggests how our solar system was formed

• What is a nebula?

Nebula

• A nebula is a cloud of dust, hydrogen, helium, and other gases

• Nebulas are the birth place of stars

Nebular Hypothesis

• Explains how a solar system is formed from a nebula

Nebular Hypothesis

1. A nebula begins to spin and condense.

2. In the center, the hydrogen collects and forms a hot, dense ball (protostar).

3. When nuclear fusion begins, the hydrogen atoms fuse and ignite the star.

4. The remaining dust around the star collects and clumps into planets.

How was Earth formed? How did it develop into what we see today?

• Your will work in your column and be given 9 steps of the formation of the Earth. Your job as a group is to place each step in order then illustrate each step on butcher paper. Finally, your group will present their order to the class tomorrow.

• Every student must be involved in the creative process and the presentation process

DYL

1. What is a nebula?2. What theory describes how our solar system

was formed?3. What galaxy is our solar system located in?