Chapter 12-ch 13pt1
What is relative dating?
method geologist use to place rocks in chronological order, it identifies which rock came first
Describe Precambrian life
Life was in the ocean with single celled organisms that didn't need oxygen, however at the end of Precambrian life the multicellular organisms came and needed oxygen.
Describe the Food web
Shows feeding relationships. Success or failure of one population can change every population
4 forms of precipitation
rain, snow, sleet, hail
Relative humidity
the amount of water vapor in the air compared with the maximum amount of water vapor that the air can hold at a certain temp
What is Superposition?
In a sequence of sedimentary rocks, the layer is older than the one above it and younger than the one below it
What are Energy Resources and how are they made?
Oil and Natural gas are main energy sources from the ocean floor. The remains of marine life were buried and heated from Earths' interior and pressure from rocks that turned them into oil and natural gas.
Describe Currents
Currents effect climates because when the ocean water is closer to the equator it absorbs more energy from the sun than from farther away from the equator. Currents from low-latitude regions move into higher latitudes, they transfer heat from warmer to cooler areas, and when the colder water travels to the equator, it cools the hotter water.
What is water vapor
water in gas form
how do clouds form
they form when water vapor goes from gas to liquid due to the cooler temperatures, it then condenses into dust particles in the air
What is a fossil?
The remains or physical evidence of a once-living organism. It is preserved in sedimentary rock.
Describe Plankton
Organisms that drift with ocean currents. Some can swim but when they do they are weak or they swim vertically.
What is the atmosphere?
A mixture of gasses that surround the Earth
Solid to liquid(melting) liquid to solid (freezing) gas to liquid (condensation) solid to gas (sublimation) gas to solid (deposition)
Wind
Horizontal differences in air pressure. the air flows from areas of high to low pressure
What were the eras in the Phanozoic eon and what were the animal life?
Paleozoic era: Marine life, formed 542 million years ago. Mesozoic era: Reptile life, formed 251 million years ago. Cenozoic era; Mammal life formed 65 million years ago
Describe Phytoplankton
Break down of the atmosphere
78%nitrogen, 21%oxygen 1%trace gases 0.93% argon, water vapor, carbon dioxide and other gases
Humidity
the amount of water vapor in the air
What is astronomy
the study of space
Describe the Atmosphere
It was made up of water vapor, carbon dioxide, nitrogen, trace gases but no oxygen. However the Photosynthetic bacteria put oxygen over time.
Describe Zooplankton
Earth's motion
Rotation is the Earth spinning on its axis it takes 24 hours to rotate once. Revolution is movement around the sun. it takes 365.25days to revolve around the sun
Why does warmer air hold more water vapor
Because air is less dense
Describe our galaxy
the earth is part of the solar system, which is part of the Milky way galaxy, which is 1 of possibly 2 trillion galaxies in the universe which contain billions of stars