Oceanography
How much oxygen is provided from oceans?
More than half of our oxygen comes from the ocean! Most of the production comes from oceanic plankton, algae and bacteria that can photosynthesize!!!1
How many major layers are there?
There are 5 major layers that consist of the troposphere, stratosphere, mesosphere, thermosphere and exosphere.
What are the 3 main types of rock?
sedimentary, igneous, and metamorphic
Define a fossil
Fossils are the preserved remains, or traces of remains, of ancient organisms.
How long does it take for a volcano to form?
Around 10,000 to 500,000 years
How does a trench form?
It forms when an oceanic plate collides with another at a convergent boundary. The denser plate is pushed under the other plate.
Which layer protects us from UV rays?
The ozone
How do sedimentary rocks form?
Sedimentary rocks are formed from pre-existing rocks or pieces of once-living organisms.
How do fossils become fossils?
When an organism dies it becomes covered in a sediment in which the minerals from said sediment seep into the remains and fossilizes it.
How hot is lava?
Lava's temperature can range between 1,300 to 2,200 degrees Fahrenheit.
Name the three plate boundaries
Divergent boundaries
Convergent boundaries
Transform boundaries
Which layer is the farthest away?
The exophere
How do igneous rocks form?
Igneous rocks form when hot, molten rock crystallizes and solidifies.
Define and body fossil
The fossils of bones, teeth, and shells.
How do volcanoes erupt?
For an eruption to occur, enough magma must accumulate in the chamber under the volcano.
How many organisms are found in the ocean?
Over 90% of living creatures are found in the ocean
How many miles high is the mesosphere?
31 to 50 miles
How do metamorphic rocks form?
when rocks are subjected to high heat and high pressure
Define a trace fossil
Trace fossils are rocks that have preserved evidence of biological activity. AKA an imprint of a leaf.
How do volcanoes form?
Volcanoes are formed when the earth's plates move together or apart, causing magma to come up to the earth's surface.
What largest living structure can be found in the ocean?
The Great Barrier Reef
Which layer contains 99% of water vapor?
The troposphere
What is believed to be the oldest rock found on earth?
The oldest rock is thought to be from the Acasta Gneiss
What is a microfossil?
A fossil that can only be seen using a microscope.
How many people die from volcanoes?
Around 1000 deaths per year