Soil And Crap Flashcards
A bird is more likely to b a fossil than worm t or f
True has bones
Dino bones can tell us how old the earth is t or f
False, dinosaur bones don’t measure time
Last t or f is true ifk
Oohihguihg
What is a fossil?
The preserved evidence of an organism that lived in the past
Intrusion?
A large mass of igneous rock pushed into layers of existing rock
Soil profile
Cross section of the layers of soil and bedrock in a specific area
Pore space
The amount of space between soil particles
Bedrock
Layer of soild Rock beneath the soil
What is the order of rock layers
Geological column
Unconformity
A break in the geological record where rock layers are missing
Fault
Earthquakes form along these lines
Why is tropical soil not fertile?
Heavy rainfall comes and washes away topsoil and all minerals etc.
Law of superposition?
Each layer of sed rock is older than the layer above it and and younger than the layer below it
Was does soil differ from place to place
Climate
What are three tools to tell how old the earth is
- carbon-14 dating
- varves
- tree rings etc
Describe soil on your area
*fertile
Growing soil
Thick top soil
How to help= crop rotation, prevent erosion, plants lots of plants
T or f and why
The soil horizon next to bedrock is broken into tiny grains bc of pressure
False this layer isn’t broken apart into small pieces bc it’s not subject to erosion and weathering
