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Products
Mind Mapping Software
Outlining Software
甘特图软件
Uses
Mind Maps for Education
企业思维导图
用于个人发展的思维导图
思维导图的好处
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部落格
Video Tutorials
Help Center
甚麼是思維導圖?
在线创建思维导图
概念图制作者
文章
Top 29 Mind Map Examples
Gantt Chart Software
Concept Map Template
Free mind map software
What is a concept map?
Gantt Chart Maker
Mind Map App
Concept Map Maker
Mind map template
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个人和工作
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pressure
作者:
NAJLAA' BT JUNAIDEE
4 年以前
326
TYPES AND CHARACTERISTIC OF ROCKS
Rocks are categorized into three primary types based on their formation processes: igneous, metamorphic, and sedimentary. Igneous rocks form from the cooling and solidification of magma or lava.
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TYPES AND CHARACTERISTIC OF ROCKS
SEDIMENTARY ROCKS
Examples of sedimentary rocks
Coal
Gypsum
Conglomerate
Shale
Sandstone
Limestone
Softer and more brittle than igneous rocks
Have dull surfaces
Have no crystallised structures
Often contain fossils
have layers
The fragments of sediments are transported by streams and deposited with mud,silt,sand,animal shells and fossils on the seabed
Are weathered and eroded by wind,rain,waves,ice and heat from the Sun to form fragments of sediments
METAMORPHIC ROCKS
Examples of metamorphic rocks
gneiss
marble
Some have no layers like marble
Some have layers like gneiss and slate
Harder and denser than their parent rocks
Some contain crystal such as schist
Shiny
Are formed either igneous rocks or sedimentary rocks that undergo chemical changes due to very high pressure and temperature
IGNEOUS ROCKS
Example of igneous
Characteristic
contain no fossils
have no layers
have crystallised structures
shiny
hard
Magma that is trapped deeper in the crust will cool slowly and crystallise into coarse-grained igneous rocks such as
diorite
gabro
granite
Lava cools rapidly and crystallises into fine-grained such as:
obsidian
pumice
basalt
During volcanic eruptions,magma spurts out of the Earth's surface as lava