Plate Tectonics
Volcanoes occur at what type of plate movement?
divergent, however convergent plate movement near a volcano can cause it to erupt.
We organize time periods in Earth's history as what?
A) Eras
B) Periods
C) Years
D) Centuries
A) Eras
What is erosion?
The movement of sediment from one place to another
...Why do we find fossils in sedimentary rocks?
They are softer allowing casts and molds to form.
Put the layers of earth into order from what we walk on to the centre?
Mantle, inner core, outer core, crust
Crust, Mantle, outer core, inner
A fault block mountain like the san andreas fault is formed from what type of tectonic plate movement?
Transform
When bones are replaced by minerals in the ground it is called?
fossils
Acid rain is an example of what type of erosion?
Chemical, Mechanical or Biological?
Chemical (the interaction of rock with mineral solutions (chemicals) to change the composition of rocks.)
What is the difference between the streak and colour characteristics of a rock?
Colour is what is visually appears like when looking at it,
Streak is what colour the rock leaves behind when it is scratched on a white surface.
Plate tectonics are able to move as they rest on _______ part of Earths lithosphere.
Magma (pieces of a cracked shell that rest on the hot, molten rock of Earth's mantle)
What type of plate boundaries are found at the ring of fire?
divergent and convergent (evidence is that this is a high degree of volcanoes and earthquakes).
In a mold or casts
Rain freezing in the crack of a rock, eventually splitting the rock, is an example of what type of erosion?
Chemical, Mechanical or Biological?
Mechanical or physical (wind, water, rain)
The way light reflects off of the surface of a mineral is considered to be talking about what characteristic?
Lustre
The inner core is considered to be a ________ despite the incredibly hot heat it is under because of the pressure.
solid (iron-nickel alloy)
A head-on collision?
Convergent plate tectonic
When an organism is buried under many layers of sediment, pressure and heat build-up, leaving a thin. film of carbon residue on the rock surfaces. This residue forms the outline of the organism and is called? petrified residue or carbon-dated remains?
carbon film
Weathering and erosion are considered to be what type of change, sudden or gradual?
gradual, they happen over time
igneous rocks can form inside the earth's crust or on the surface of earth's crust. Which type of ingenious rock forms the larger crystals and why?
Intrusive because there is more pressure and takes more time to cool.
The thickest layer of earth is?
The mantle (84% of the planet's total volume)
When two plates collide and the thinner oceanic plate is forced under the continental plate, it is called a what type of zone?
Subduction zones form where a plate with thinner (less-buoyant) oceanic crust descends beneath a plate with thicker (more-buoyant) continental crust
What is a trace fossil?
a fossil that provides indirect evident evidence of ancient plants or animals, such as footprints, nests, burrows, or feces
An example of a sediment is?
mud, silt, sand, gravel that travel in water and settle at the bottom.
Rocks are classified into 3 families of rocks based on....
How they are formed
The thinnest layer of earth is ________?
Earths crust (3 to more than 43 miles (4.8 to 69 kilometers) thick. Even though this layer seems thick, it's nothing compared to the other three layers. If the Earth was an apple, the crust would only be as thick as the skin!)