• Shuffle
Toggle On
Toggle Off
• Alphabetize
Toggle On
Toggle Off
• Front First
Toggle On
Toggle Off
• Both Sides
Toggle On
Toggle Off
Toggle On
Toggle Off
Front

### How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

Play button

Play button

Progress

1/29

Click to flip

### 29 Cards in this Set

• Front
• Back
 True shape of earth: slightly flattened sphere, due to earth's rotation Oblate Spheroid Imaginary straight line which runs through the earth from the North Pole to the South Pole Axis All the earth's water Hydrosphere Percentage of earth's water which is salty 97% Layer of gases surrounding the earth Atmosphere What are the two most abundant gases in atmosphere? What percent of the atmosphere are each? 78% Nitrogen, 21% Oxygen Thin, solid outermost zone of the earth; makes up 1% of earth's mass Crust Crust underlying world's oceans; thin, only 5-10 km thick Oceanic Crust underlying earth's continents. Varies 32-70 km in thickness - thickest under mountains Continental Zone of rock nearly 2870 km thick which lies below the earth's outermost layer; divided into upper and lower regions, this zone makes up 2/3 of the earth's mass Mantle This is the uppermost portion of the mantle, and TOGETHER WITH THE CRUST ON TOP OF IT - forms a rigid layer which is 65-100 km thick Lithosphere Below the _________________________ (#14) this layer is about 200 km thick. It is SOLID ROCK! but because of enormous heat and pressure, this layer flows like putty Asthenosphere The term which describes the ability of a solid to flow Plasticity Forms the center of the earth, divided into inner and outer sections - made mostly of iron, this layer makes up 1/3 of the earth's mass. Core Dense layer of liquid iron about 2,190 km thick Outer Core Dense solid about 2,680 km diameter at the very center of the earth - mostly iron Inner Core Vibrations which originate at or near earth's surface due to earthquake or explosion and move through the earth 20 Seismic Waves Faster of two seismic wave types; they can move through solid, liquid or gas P Waves Slower of two seismic wave types; they can only move through solid material S Waves Seismic waves travel ___________ through material which is more dense/rigid Faster Short for Mohorovocic Discontinuity, this is the boundary between the crust and the mantle. Discovered because seismic waves speed up as they leave the less dense crust and enter the more dense mantle. Moho Locations on the earth more than 103 degrees from earthquake/explosion causing seismic waves where no secondary waves are felt, due to the fact that they cannot get through the liquid outer core of the earth S Wave Shadow Zone Locations on the earth more than 103 degrees but less than 143 degrees from earthquake/explosion causing seismic waves where no primary waves are felt, due to the fact that the waves bend/change direction as they enter layers of different density as they move through the earth's interior P Wave Shadow Zone Region of space (which extends out past the atmosphere!) affected by the earth's magnetic field Magnetosphere Motions within this layer of the earth are thought to be responsible for the creation of earth's magnetic field Liquid Iron Outer Core Force of attraction which exists between all matter in the universe - the most important thing you will learn about all year. It's the LAW! Gravity The amount of matter in an object Mass The amount of gravity force exerted on a mass Weight "The amount of gravitational attraction between two objects depends upon: 1) the masses of the two objects, and 2) the distance between the two objects" THIS DEFINITION IS SOOOOOOOO IMPORTANT. KNOW IT. KNOW IT. KNOW IT!!!! And be able to APPLY it. Law of Gravitation