1
What do we call melted rock deep inside the Earth?
Magma
________________ Rocks from when existing rocks are changed by heat and pressure deep inside the earth.
Metamorphic
Scientists who study rocks are called __________
Geologists
__________ is a shiny, black volcanic rock that is actually a type of natural glass
Obsidian
____________ is a type of sedimentary rock made from tiny shells, skeletons, and coral of dead sea creatures that settled on the ocean floor millions of years ago.
Limestone
When magma reaches the Earth's surface (like during a volcano eruption), it's called
Lava
The ________________ shows how rocks change from one type to another over long periods of time.
The Rock Cycle
__________ is a smooth, hard metamorphic rock formed when limestone is changed by intense heat and pressure deep underground over million of years.
Marble
__________ is a type of sedimentary rock made from tiny grains of sand- mostly quartz- that have been pressed and glued together over millions of years.
Sandstone
_________ is a super old, super strong metamorphic rock, often over a billions years old.
Gneiss
What do we called natural materials made of minerals that form the Earth's crust?
Rocks
_________ weathering is when the minerals in rocks change into different substances.
Chemical
When rocks break down through weathering and erosion, they become ________
Sediment
___________ happens when weathered rock pieces are carried away by water, wind, ice, or gravity.
Erosion
_____________ is a smooth, hard metamorphic rock that forms deep underground from clay or volcanic ash under intense pressure.
Gneiss
__________ is a common, soft, fine-grained sedimentary rock formed from compacted mud, silt, and clay.
Shale
_____________ Rocks form when small pieces of rocks, plants, animals, and minerals called sediment get pressed together over time.
Sedimentary
________ Rocks form when hot, liquid rock called magma cools and hardens.
Igneous
________ is a very hard, speckled, igneous rock formed deep underground when melted rock (magma) cools down slowly.
Granite
Name one of the three types of rocks we talked about
- Sedimentary
- Metamorphic
This pressure, along with natural cement from minerals in water, turns the sediment into sedimentary rock. This process is called__________.
Lithification
_____________ is a hard, dense, dark-colored (black or gray) volcanic rock formed when lava cools quickly above ground.
Basalt
____________ is the process that breaks down rocks into smaller pieces.
Weathering
__________ weathering is when rocks break apart without changing what they're made of
Physical
Change types