Layers of the Earth
The top layer of the Earth
Crust
What does the Mohs scale determine?
Hardness
Identify the following as an igneous, sedimentary, or metamorphic rock: conglomerate.
Sedimentary
Hot melted rock under the surface of the earth is called __________.
Magma
A __________ is a hard, natural substance made of one or more minerals. It sometimes contains organic materials.
rock
The middle layer of the Earth
Mantle
The characteristic of a mineral to break along smooth, straight lines or into flat sheets is called?
Cleavage
Identify the following as an igneous, sedimentary, or metamorphic rock: granite.
igneous
Some minerals are found in __________ buried in the earth’s crust.
veins
A rocklike substance that forms from decayed plant matter is called __________.
coal
The inner layer of the Earth
Core
The color of the mark made when a mineral sample is rubbed on a harder surface is called the __________.
Streak
The rock that forms when layers of sediment and organic material harden is
sedimentary
Gemstones that are beautiful and rare are called precious stones. True or False
True
Scientists who study the structure, rocks, and minerals of the earth are called __________.
Geologists
Most of the Earth's mass is located in the?
Mantle
When a rock breaks into uneven rough surfaces
Fracture
A rock formed by heat and pressure deep below the earth’s crust is classified as
metamorphic
Small bits of weathered rock make up __________.
sediment
Particles in the soil that were once part of a living thing are known as __________ particles.
organic
What layer of the Earth contains most living things
Crust
The way that a mineral reflects light is called it's __________.
Luster
The rock formed from magma or volcanic lava is called __________.
igneous
The movement of sediment from one place to another is called __________.
erosion
Geologists classify rocks according to how they __________.
form