Fossil History
Trace fossils like ____ and ____ show how animals moved and lived.
What are footprints and burrows?
Mass wasting is also called ____ movement or gravity erosion
What is SLOPE
Layers of rocks are called __________
What are STRATA
Before World War II, scientists believed the ocean floor was mostly ________
What is FLAT
Tectonic plates float on the layer of the mantle called the _______
What is ATHENOSPHERE
____________ dating uses radioactive elements to find actual ages of rocks.
What is ABSOLUTE
The main force that causes mass wasting is _____
What is GRAVITY
Fossils can be formed when an organism is quickly buried by _________-
What is SEDIMENT
What is SONAR
The Cascade Mountains and Andes Mountains are formed at ______ boundaries
What are CONVERGENT
____ _____ are sudden disappearances of many species in the fossil record.
What are mass extinctions
___________ are rapid movements of large amounts of earth material downhill.
What are LANDSLIDES
What are MINERALS
What is Mid-Atlantic Ridge
What are FOLDED
The extinction the killed the dinosaurs happened about __ million years ago.
What is 66
What is SLUMP
_______ fossils are actual parts of organisms, such as bones or shells.
What are BODY
The oldest ocean crust is found _______ from the mid-ocean ridge.
What is FARTHEST
A ______ is a break in Earth's crust where movement occurs.
What is FAULT
Fossils are found in _____ of sedimentary rock.
What are layers
_____ is a very slow movement of soil downhill
What is CREEP
______ fossils are actual parts of organisms, such as bones or shells.
What are BODY fossils
Subduction recycles ______ and balances Earth's ________
What are CRUST and SURFACE
What is HOT SPOT