Earth's+Crust+1

=Mountain Formation Mr.Terry Science 7 BB & ST=

Vocabulary
Moutain - A large, naturally accurring formation of Earth's surface, that rises sharply above the surrounding area.

Anticline - An upfold of rock layers insedimentary rock.

Layer - Insedimentary rock.

Normal Faults - A verticle fault in which rock, moves downward.

Syncline - A down fold of a rock

Faults - An area where two very large rock, surfaces move against each other.

Questions
1. How do you tell if mountains are young or old? 2. What is syncline? 3. What is anticline? 4. How do mountains fold? 5. How long does it take for a mountain too form? 6. How tall does a mountain have to be, to be considered a mountain? 7. Does wildlife live on mountains? 8. What is the smallest mountain? 9. Do all mountains have snow on the top? 10. When was the first mountain, formed?

Mountain Formation
Mountain formation is where mountains are formed. A mountain is a large amount of land that rises high above its surroundings. People explain that rock layers can fold when they are hot enough, and it can act like a bendable plastic. That, is how you get the folds in the mountains. The top part, of a folded rock is called the anticline. Anticline is an upfold of rocks. The bottom part of a rock, is called called the syncline. This is a down fold of a rocks. Fold mountains are the most common type of mountain. The world’s largest mountain ranges are fold mountains. These ranges were formed over millions of years. Fold mountains are formed when two plates collide head on, and their edges crumbled, much the same way as a piece of paper folds when pushed together. How can you tell when a mountain is yound or old? Well, when an moutains edges are sharp and pointy, it is a younger mountain. When the edges are more rounded, it is an older mountain. Sometimes, the rocks in Earth's crust are too brittle to fold, but when pressure is exerted on them, they break and form a fault. Faults can move up and down or vertically. Vertical faults are called normal faults. If the rock moves down it is called reverse faults. It takes hundreds of years for a mountain to form. A hill must be at least over 305 meters to be considered a moutain. Anything under that, is considered a mountain. Have you ever heard of mountain goats? Well, they live on mountains. Mountains have to be a certain height, to have snow on the top. Because, it is colder when the mountain is above the clouds. Our planet was formed about four and a half billion years ago, and it is likely that there were mountains from the beginning.


 * These are the folds in a Fold Mountain.**

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 * This is a Fold Mountain. It is the most common mountain.**



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