Rocks
What is weathering
the breakdown of rock
How does a sedimentary rock turn into sediment?
weathering, erosion, and deposition
what is the way to estimate the age of sedimentary rocks
oldest layer at the bottom, youngest at the top
what happens to KE of an object when it increases its velocity (speed)
more speed, more KE
type of rock that has layers and fossils
sedimentary
What is erosion
the transport of sediment
little bits of dirt, sand, and pebbles. weathered metamorphic rocks turn into this
sediment
what is the way to estimate the age of different fossils found in different rock layers?
oldest fossils at the bottom, youngest at the top
what happens to PE when an object is placed at a higher position?
the higher the position, the more PE
True or False
Fossils are common.
If false, correct the statement
false, rare
How are sedimentary rocks formed?
Compaction and cementation of sediments - Pressure
layer where oldest rocks are found in sedimentary rocks
lowest layer
define fossil record
all the known fossils and their position in layers of rock
Describe how the PE and KE of a rollercoaster changes as it is going up a hill
the higher it goes, the more PE and the less KE
Layer where youngest fossils are found
top
how do rocks turn into sediment?
weathering, erosion,
True or False
Youngest layers of sedimentary rock are always at the top.
If False, correct the statement
False, sometimes at the top
Why are youngest rocks not always found at the top layer of sedimentary rocks?
Process of folding when rocks come under stress or pressure
tug of war: person pulling left with 50 N and person pulling right with 40 N. What is the net force?
10N to the left
Fossils of dinosaurs are the original dinosaur bones. true/false. Explain your answer
A fossil itself is not the original bone, but rather a rock that has replaced the bone's organic material over time through a process called fossilization. It is a mineralized "cast" of the bone's shape.
what is sediment?
small particles that are suspended in water
what type of rock is in horizontal layers that often contains fossils?
sedimentary rocks
Most fossils are of land organisms. T or F. If false, change the statement to make it true.
Most fossils are of marine organisms.
person pulling a wagon with a force of 60 N. The wagon experiences friction of 40N to the left. What is the net force?
20N to the right
Footprints and skin impressions can be fossilized. T or F
True