Chp 1 Overview Notes: Earth’s Ingredients For Life
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Transcript of Chp 1 Overview Notes: Earth’s Ingredients For Life
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.