Astronomy
Death of a star by explosion is called what?
Supernova
What is the innermost chemical layer of Earth?
Core
Which mass extinction was caused by an asteroid hitting the Earth and killing the dinosaurs?
Cretaceous- Tertiary Mass Extinction
Determining the actual age of a rock layer is known as what type of rock dating?
Absolute Rock Dating
The continents were once in a single landmass called?
Pangaea
A star is born once it starts what?
Nuclear Fusion
Which layer is liquid iron and nickel?
Outer Core
Which mass extinction is known as the greatest mass extinction in Earth's History?
Permian Mass Extinction
A rock layer is older than the layer above it and younger than the layer below it because of what rule?
Law of Superposition
Two continental plates colliding form what?
Mountains
This Astronomer first put forth the idea of a heliocentric solar system?
Copernicus
Which three layers interact with each other to form convection currents?
Outer core, Mesosphere, Asthenosphere
Which mass extinction was caused by new kinds of plants drastically changing the climate?
Late Devonian Mass Extinction
The amount of time it takes of a radioactive element to break down by half is known as its what?
Half-life
When an ocean plate and a continental plate collide, what do they form?
Volcanoes
What type of spectrum shows a colored background with black lines that appear?
Absorption Spectrum
Which two physical layers of Earth are considered semi-solids?
Asthenosphere and Mesosphere
Ordovician-Silurian Mass Extinction
The rule that states that a fault or fracture must be younger than the layers through which it cuts through is known as what?
Cross-cutting Relationship
Two ocean plates moving apart created what?
Mid-ocean Ridge
Which planet is the hottest?
Venus
List the chemical layers of Earth in order starting with the outermost layer.
Crust, Mantle, Core
Which mass extinction was caused by plate tectonics which led to massive volcanoes and lava floods?
Triassic- Jurassic Mass Extinction
If radioactive element A has a half-life of 1,500 years, how old would a fossil found with 12.5% of element A remaining be?
4,500 years old
Who discovered the Theory of Plate Tectonics?
Harry Hess