Types of Rocks
This rock forms when molten rock or magma hardens.
What is igneous rocks?
This rock can have fossils inside it and is often not as hard as other rock types, and has layers.
What is sedimentary rocks?
This is the pure, solid, naturally occurring substance that acts as the "ingredient" or building block used to make rocks.
What is mineral?
This process is the breaking down of rocks into smaller pieces by wind, rain, and ice.
What is weathering?
A mixture of mineral particles, organic matter, water and air that covers Earth's surface.
What is soil?
This rock forms when sediment is compacted and cemented together.
What is sedimentary rocks?
This rock often has gas bubbles, interlocking crystals and a strong hardness.
What is igenous rock?
This is the outermost and thinnest layer of the Earth, made of solid rock that we walk on every day.
What is the crust?
This process describes the movement of rock pieces from one place to another by wind, water, or gravity.
What is erosion?
This gritty, coarse soil often has great drainage, does not retain water well, and is made of particles of rock.
What is sandy soil?
This rock forms when impacted by pressure and heat.
What is metamorphic rocks?
This type of molten rock is found inside the Earth before it erupts.
What is magma?
The study of rocks and materials that make up Earth?
What is Geology?
To turn any rock back into an igneous rock, these two things must happen to it deep underground.
This is the finest and stickiest particle found in soil; it holds onto water easily and gets heavy when wet.
What is clay?
This rock is formed from magma that cools and hardens outside the Earth's crust.
What is extrusive igneous rock?
This rock is formed from magma that cools and hardens inside the Earth's crust.
What in intrusive igneous rocks?
This dark fossil fuel is a sedimentary rock that humans burn in power plants to create electricity.
What is coal?
A continuous and dynamic process where Earth's rocks change from one type to another over geological time.
What is the rock cycle?
This soil smooth, fine-grained type of soil or rock material is made of tiny particles that sit right in the middle between sand and clay.
What is silt?
These small pieces of broken-down rock, sand, and shells accumulate at the bottom of lakes and oceans.
What is sediment?
This term describes the layered or banded look found in many metamorphic rocks, caused by direct pressure during the rock cycle.
What is foliated?
This property describes the way light reflects off the surface of a mineral, making it look metallic, glassy, or dull.
What is lustre?
This is the approximate length of time it takes for a rock to complete a full journey through the rock cycle.
What is millions of years?
This specific type of super-fertile soil is a perfect, even mixture of sand, silt, and clay, making it a favorite for gardeners.
What is loamy soil?