rocks and minerals
what is a rock made form ?
Rock is made up of one or more pure, naturally occurring, non-living crystalline materials called minerals.
what evidence do we have of ancient life more than 10 000 years old.
fossils
Principle of superposition is?
older layers are always under younger layers
what are some minerals that are found throughout the earth's crust?
quartz,feldspar,and mica.
fossils provide clues of ?
when plants and animals first lived on the planet
sedimentary layers are called?
starta
.how could you find out if something is actually gold?
investigate its properties
fossils are useful in determining history and?
dates of rock layers.
Index fossils are?
Fossils used to determine the relative age of a layer of rock
out of talc or corundum which is more easily scratched?
talc
layers of rock may reveal?
information about the environment or climate
radiometric dating is?
measuring the amount of an element
what is the hardest mineral?
diamond
how do things become fossils?
when plants or animals decay but the remains but protected and become fossils
radiocarbon dating is?
a method used to find bones