Chp 1 Overview Notes:Earth’s Ingredients For Life

Main Idea 1: Specific characteristics make Earth inhabitable.What would these be?

Atmosphere

The largest mass of Earth holds the smallest gas particles.

Reason It Survives:

Important Characteristics For Life: Ave temp =

17COxygen!

Another Ingredient for Life on Earth is Liquid Water

Where did Earth’s water come from?

Liquid WaterTwo Possible Origins:

1. Water vapor came from Early volcanoes, then condensed.

2. Collisions w/ icy asteroids & comets brought water.

About The Ozone Layer….

Good or bad?

Ozone Layerhelps protect us!!Composed Of:Molecules made of 3 oxygen atoms.Effects:

Absorbs UV radiationFrom sun so less UV reaches us.

What causes Earth’s magnetic field and why is this important to life on Earth?

Magnetic Field

Formed By:Earth’s rotations “swirl” the iron core. This creates a magnetic field with N & S Poles.Effects:

Charged particles from the sun are blown off course by the magnetic field.

Temperature

Main Points:Earth is not too hot or too cold b/c of the Greenhouse Effect.

When CO2 & other gases in the atmosphere trap in solar radiation; causes global temps to rise.

Greenhouse Effect:

What is the greenhouse Effect?

Main Idea 2: Matter & energy on Earth are neither created nor destroyed; they are merely transformed from one form to another.

Conservation of EnergyPotential Energy

Describe:Energy of matter derived from its position.

Conservation of EnergyKinetic EnergyDescribe:Energy of matter associated with motion.

Rocks are constantly changing as a result of weathering forces, melting..This is an example of

Conservation of Matter.

Explain:During rock cycle, matter making up each rock is transformed into a differ chemical structure, andso on.. No NEW Matter, none LOST.

Conservation of Matter: Not created, not destroyed. Just changes from one form to another.