Igneous Rocks

A student was classifying items in his earth science class. Which RULE of being a mineral did he use to classify the items he placed in category A vs. category B?

• inorganic

• solid

• crystal structure

• definite chemical composition

Natural diamonds form as carbon crystallizes within rock. This process takes place without the help of humans in a variety of places.

Which rule does diamond-formation follow?

• naturally occurring

• definite chemical composition

• solid

• crystal structure

Tags

NGSS.MS-PS1-1

____________ is when a mineral breaks in a jagged, irregular manner

• fracture

• cleavage

____________ is when a mineral breaks along flat surfaces

• fracture

• cleavage

Which statement describes the relationship between minerals and rocks?

• rocks and minerals are not related

• some rocks are made of minerals while others-like coal- are not

• all minerals are made of at least one rock

Igneous rocks that form when lava erupts or flows onto Earth's surface are

• sedimentary igneous rocks

• intrusive igneous rocks

• extrusive igneous rocks

Igneous rocks that form when magma hardens under Earth's surface are

• metamorphic igneous rocks

• intrusive igneous rocks

• extrusive igneous rocks

Which extrusive igneous rocks forms much of the ocean floor?

• granite

• pumice

• obsidian

• basalt

This extrusive igneous rock is glassy and has little to no crystal structure

• granite

• pumice

• obsidian

• basalt

When crystals cool QUICKLY, they form a _______________ texture

• fine-grained

• coarse-grained

• multi-grained

• whole-grained

Tags

NGSS.MS-PS1-4