Rock Cycle
These are the 3 types of rocks:
What are sedimentary, igneous, and metamorphic rocks?
These are the two main types of weathering that a substance can undergo
What is mechanical and chemical?
True or False: Erosion is the movement of material?
What is TRUE!
True or False: Relative dating gives us the most accurate age of a material?
What is FALSE.
Relative dating tells us if rocks are younger/older that each other based on their position or fossils.
True or False: Absolute dating gives us the most accurate age of a material?
What is TRUE!
Absolute dating can tell us the (almost) exact age of a material.
These rocks form when eroded material is packed down over time to create a new rock.
What are sedimentary rocks?
This type of weathering occurs when materials are physically broken down.
What is mechanical weathering
This agent of erosion affects everything on Earth. It is the reason things go from high up to low down.
What is Gravity?
These specific remnants of the past can be used to relatively date a fossil. Must state the entire term.
What are INDEX FOSSILS
What is the method used to absolutely date a rock? (carbon dating is an example)
What is radiometric dating
These rocks form when existing rocks undergo extreme heat and/or pressure over a long period of time.
What are metamorphic rocks?
This type of weathering occurs when the composition of the rock is changed into a new substance.
What is chemical weathering?
This agent of erosion can occur on shorelines, in rivers, or due to weather.
What is water?
The law of superpositions states that younger rocks are on the _____ and older rocks are on the _____
What is TOP and BOTTOM
The half life of element X is 5 years. If we begin with 50g of X, how many grams would remain after 5 years?
What is 25g?
Five years would only mean one half life has elapsed, so we only need to divide by 2 once!
This rock type includes obsidian, granite, and basalt rock
What are igneous rocks?
This specific type of weathering produces rust
What is oxidation?
This agent of erosion typically moves verrrrry slowly over land, leaving huge gouge marks in the land as it moves across it.
What is ice
The law of _________ states that a layer that has been disturbed by an intrusion of some sort must have been there FIRST and the intrusion must have come AFTER
What is the law of cross-cutting?
An original sample contained 1000g of an element. After 30 years, only 250g remain. What is the half life of this element?
What is 15 years?
What law describes the fact that even though rocks are made and broken down, they never actually "go away."
What is the Law of Conservation of Matter?
This specific type of weathering occurs when water seeps down into cracks and is continually frozen/melted
What is freeze-thaw weathering or frost wedging?
This type of erosion involve huge pieces of land that move quickly down a hillside or mountain side. Incredibly destructive!
What is landslide, mudslide, avalanche?
The law of _________ states that rocks are initially formed in a flat layer. If they are not in a flat layer, something was done to them!
What is the Law of Original Horizontality?
A sample contains 2500g of Z. After 150 years only 78.125g remain. What is the half life of Z?
What is 30 years?
(5 half-lives would have elapsed, 150years/5 half lives = 30 years)