bellringer: check dr 1-b 2-c 3- building materials 4- weathering 5- sediment 6- erosion 7-...
TRANSCRIPT
Bellringer: Check DR 1-B 2-C 3- building materials 4- weathering 5- sediment 6- erosion 7- deposition 8- minerals 9- uplift 10- surface
11- C 21- A 12- E 22- D 13- A 23- A 14- B 15- D 16- C 17- A 18- A 19- D 20- C
Rock Cycle
What is a rock?
A rock is a mixture of minerals, rock fragments, volcanic glass, organic matter, or other natural materials.
Most rock used for building stone contains one or more common minerals, called rock-forming minerals, such as quartz, feldspar, mica, or calcite.
• When you look closely, the sparkles you see are individual crystals of minerals.
What is the difference between a rock & a mineral?
Minerals are solid, naturally occurring, inorganic, have a fixed composition and are made of one or more elements.
Rocks are made of one or more minerals.
Made of elements
Solid
Can be made of lava/ magma
Have crystals
Can be formed from
solutions
Must be inorganic
Made only of compounds
Elements must be chemically bonded
Naturally occurring
Can be made from organic
materials
Mixtures made of minerals
Can be
man made
Rock Types There are three
types of rocks
Igneous
Sedimentary
Metamorphic
What is the rock cycle?
To show how rocks slowly change through time, scientists have created a model called the rock cycle.
It illustrates the processes that create and change rocks.
Rock Cycle Continued
The rock cycle shows the three types of rock— igneous, metamorphic, and sedimentary—and the processes that form them.
The Rock Cycle explains how Rocks and Natural Processes
are related
weathering
melting
pres
sure
, hea
t
Sedimentary Metamorphic
Igneous
Igneous Rocks
Formed by the cooling and hardening of hot molten rock.
If the molten rock is located within Earth it is called magma.
If the molten rock reaches the surface and exits through volcanoes, it is then referred to as lava.
Two classifications of Igneous rock;
1) Plutonic (intrusive) – forms from magma.
2) Volcanic (extrusive) – forms from lava.
Sedimentary Rocks Rock formed when the weathered products of
pre-existing rocks have been transported, deposited, and compacted or cemented into solid rock.
Usually formed in marine (water) environments where sediment is deposited by streams and rivers.
Most of Earth’s crust (95%) is igneous rock but the surface is covered by sedimentary rocks.
Three classifications of Sedimentary Rocks; 1) Clastic 2) Chemical 3) Organic
Metamorphic Rocks Rock formed below Earth’s surface when pre-existing
rock is altered by heat, pressure, and chemically active fluids.
Metamorphism changes rocks in size, shape, texture, and the minerals they contain.
