Forces in the Earth
How many layers of earth are there?
3
What tool is used to measure the strength of an earthquake?
seismograph
What evolved first, trilobites or grasses?
trilobites
what is the movement of water throughout the ground, ocean, and sky known as?
the water cycle
Does the temperature of ocean water increase or decrease with depth?
Decrease
What is the name of the single, large landmass that used to exist when all of the continents were together?
Pangaea
In this type of fault, the blocks of rock slide against each other horizontally
Strike slip
The dinosaurs began to appear during what period
Triassic
rivers that join other rivers are known as...
tributaries
These ocean features can be up to 10km deep and are the deepest places on earth
Trenches
Why do plates move?
Convection currents
Name all three types of volcano
Cinder cone
Shield
Composite
List three types of fossil
Petrification
Mold
Cast
List 3 stages of the water cycle
1. evaporation
2. condensation
3. precipitation
Tiny plants and animals that float at or near the ocean surface
Plankton
What is the core of the Earth made of?
iron and nickel
Mt. Fuji in Japan is what type of volcano?
Composite
Explain the difference between how relative and absolute dates are found of rock samples
Relative- comparing one unknown rock to another one which has a known age to see which is older
Absolute- radioactive elements
What is the water cycle powered by?
Heat
List 4 features of the ocean floor
continental shelf
continental slope
mid ocean ridge
seamount
trench
plain
What are the three theories we've learned about relating to the movement of the earth's crust?
Theory of continental drift
Theory of plate tectonics
Theory of sea floor spreading
List the three types of earthquake waves from weakest to strongest
P, S, L
What three time periods are within the Mesozoic era?
triassic, jurassic, cretaceous
How many major river basins are there in the lower 48 states?
18
Organisms that live on the ocean floor are classified as what?
benthos