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Untitled Prezi

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by

Hannah Kroeker

on 12 March 2014

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7.5
Weathering rocks
By: Gavin, Delaney, Alesha and the Hannah's
Table of contents
building rocks and blocks
7.2 Conduct An Investigation
7.3
*Sediment piling on top of organisms before they decompose.
* Buried and Pressurized
* Hardens
*Mineral deposits
* Recent=near surface Old=far down
* Can be dry, frozen, mineral, or bone.
*Not always were they were formed.
*Helps us create a timeline of the past
*Expirement
1. 7.1 - Building blocks of rocks
2. 7.2 - Conduct an investigation
3. 7.3 - Families of rocks
4. 7.4 - Fossils
5. 7.5 - Weathering breaks down rocks
6. 7. 6 - Erosion
7. 7.7 - Design your own experiment
8. 7.8 - The Rock Cycle
believe it or not rocks are made from minerals! Incase
you did not know minerals are like building blocks,
they are a substances of the earths crust. There are many different ways to tell rocks apart like: color, marital,
heavy and light, sparkly, hardness and where they were
from, still it does not mean its easy. one more small fact like snow flakes no two rocks are the same!
7.4, Fossilization
Unit 7- Rocks and Minerals
Definition-remnants of old organisms that are preserved in present day
This series of steps will show you what you need, what you need to do for this experiment.
You need a mineral kit or some rocks you find but at least number them or find the type so you don't lose track of your minerals.


Mineral Investigation

Need:

*apron or old shirt
*numbered rock samples with a wide variety of kinds
*Mohs hardness scale kit ( tests the hardness of rock or you can use a nail)
* magnifying glass
* magnets ( different sizes)
* streak plate or (back of a tile)
*dropper
*vinegar amount depending on amount of mineral
*hammer
here is one experiment that you might like. for this you will need a plastic tray, 1 pail of soil, and a pail of water. put soil in the tray and pat it down firmly then let the water trickle down to make a stream into little pool. you should see the water lift some of the dirt.
create your own experiment
7.6- Erosion
Erosion- The naturally occurring process of rock, sand and sediment moving from gravity, wind and water from one place from another.

Types of erosion

-Wind
-Water
-Ice
- Shoreline

Difference between weathering and erosion

- weathering is where rock breaks down into smaller and smaller particles, bigger or as big as sand
- erosion is the movement of weathered material from one place to another from wind, water, waves
Families Of Rocks
IGNEOUS ROCKS
SEDIMENTARY ROCKS
When rock is discovered at the surface, it can be broken into pieces (or particles) and taken all over the place by wind, rainwater, and melted snow. It gets washed down streams and rivers for many kilometers until it reaches its destination. The particles and other rock substances are called Sediment.
METAMORPHIC ROCKS
Whenever Igneous or Sedimentary rock gets shoved far below the surface, it's temperature and pressure gets raised. Also, there's magma moving throughout the Earth, and it heats and squeezes the neighboring rock. It ends up changing the rock. The different rock is not like its original rock because of what it looks like and its minerals that it has in it. This is called Metamorphic rock.
Weathering is when a rock is broken or wore down because of weather.
There are 3 types of weathering.
-Biological
-Chemical
-Mechanical
Example of mechanical
Ice wedging
Example of biological
Root wedging
Example of chemical
Co2 mixing with rain
Igneous rock is created when hot molten rock under the surface of the Earth (magma) forms a rock from the hardening liquid.
DID YOU KNOW?
Most of Earth's surface is made up of Igneous rock, and it's still being formed today. Cool!
When magma cools underground, it is then called Intrusive Igneous rock. You can only see Intrusive Igneous rock on the surface when after years of erosion have eaten away the layers of the Earth's crust.
When magma is forced out and onto the surface, it's called Lava. The rock that's formed out of the lava (when it cools, of course) is called Extrusive Igneous rock.
DID YOU KNOW?
One of the largest chunks of
granite in the world is
Stawamus Chief near
Squamish, BC. It's a common
Intrusive rock. Interesting!
The size of the crystals in the rock are determined at the rate in which the molten cools. For granite, you can see it with the naked eye. But with obsidian, you cannot.
On the lake (or ocean) floor, the Sediment will then pile up. The weight of the upper Sediment will then compact the lower Sediment. Dissolved particles surround the layers and act as a cement, which then makes the Sediment harden. This is called Sedimentary rock. The rock can also include fossils, animal and plant remains that were put there along with the Sediment.
Rock Cycle
Rocks Change Overtime!
Weathering
Erosion
Heat
Pressure
Cooling
Sometimes, different rocks have been changed so much that they no longer look like the original rock, or parent rock. Many times, geologists can find the link between the parenting rock and the other rock.
The cycle does continue going, though. If you add more heat and pressure, the rock can change multiple times.
DID YOU KNOW?
More Metamorphic rock is being made all the time. Awesome!
There are 9 important steps for this experiment and are needed to be followed carefully.
Full transcript