The thin outer layer of the earth is called the ___ ?
Crust
A geologist studies the structure, rocks, and animals of the ocean.
False: a geologist studies the structure, rocks, and minerals of the earth.
What is a type of metamorphic rock?
Coal, Limestone, or Slate?
Slate
Name 3 uses of minerals (NOT Gemstones)?
toothpaste, foods, drinks, medicines, fertilizer, dry wall, paint, glass, pottery, electronics
Igneous Rock
What is a loose material on the surface of the earth in which plants can grow?
You know this one!
Soil...plants grow in soil. :)
The center of the earth is called __ ?
Core
The hot melted rock that makes up the mantle of the earth is called magma.
True! Remember, once magma reaches the surface of the earth, it is then called lava.
What is a rock-like substance that forms from decayed plant matter?
*This one is a little tough, but you got this!
COAL
(Did you get it? If not, review it again.)
Where are minerals usually found?
Minerals are usually found ON the surface of the earth OR buried in the earth's crust in rocks or in veins.
Rock that forms when layers of sediment and organic material harden is called ___ ?
Sedimentary
What is the way a mineral reflects light?
Luster
Most of the earth's mass is in the ___ ?
Mantle (it is the largest layer of the earth)
Weathering produces small bits of weathered rock called sediment.
True
What is the ability of a mineral to resist scratching called?
Hardness (the harder the mineral, the harder it is to scratch).
What is weathering?
Weathering: the wearing away and breaking down of rocks.
Rock formed by heat and pressure deep below the earth's crust is called __ ?
Metamorphic
What is a type of sedimentary rock?
Obsidian, slate, or limestone?
Limestone
An inorganic substance found naturally in the earth is called ___ ?
Mineral
The movement of sediment from one place to another is called erosion.
True!
Which is a type of igneous rock?
obsidian, slate, or coal?
Obsidian!
What is erosion?
Erosion: the movement of sediment from one place to another.
The color of the mark made when a mineral sample is rubbed on a harder surface is called the ___ ?
Streak
Some minerals are also metals.
TRUE! (Did you get that one?)
What is a hard, natural substance made of one or more minerals that contain organic materials?
a rock
How could weathering and erosion help people find minerals in lower levels of the earth?
Weathering and erosion could remove some of the surface material and expose lower levels of the earth where minerals might be found.
A substance made of things that were never alive is _?
inorganic
What is a mineral that can be cut and polished for use?
gemstone
The characteristic of a mineral to break along smooth, straight lines or into flat sheets is called __ ?
Cleavage
Because gemstones are considered beautiful and rare, they are semi-precious stones.
False! Remember, semi-precious stones are less valuable and more common than a precious stone such as a gemstone or a diamond.
What scale is used to determine the hardness of minerals?
The Mohs scale
Explain how the Genesis, or Great, Flood could have contributed to the formation of sedimentary rock.
The waters of the Flood could have stirred up or moved great amounts of dirt and particles. Once the waters receded, the particles would then settle into layers.