1. Weathering, Erosion and Deposition
6th Grade-FCAT 2.0 Review
Weathering, Erosion and Deposition

2. Weathering, Erosion and Deposition
EQ: What processes formed the beaches of Florida?

4. Explore
Describe examples of weathering, erosion and deposition, and human impact

5. Explain
Great Sand Dunes Animation
Explain how weathering, erosion and deposition may have produced the sand dunes in the picture.
Weathering broke up the rocks that made the mountains, creating sediments. Erosion by wind, water or gravity move sediment to the base of the mountain. The Deposited sediment collected and formed dunes.

6. Elaborate Earth’s surface is constantly changing.
Movements at _______________ build up Earth’s surface, forming mountains.
The __________ of plate tectonics includes _______________ that the continents have moved and are still moving today.
Plate boundaries
theory
evidence

8. Elaborate
Earth’s solid crust lies over a layer of molten material called the ________.
As materials deep in the mantle become heated, they become less dense and rise.
At the same time, materials closer to Earth’s surface spread out, cool, and become dense.
This denser material sinks below the hotter, less dense material.
mantle

9. Elaborate
Uneven heating causes material in the mantle to constantly rise and fall in a convection current.
As convection currents move the molten material sideways, large portions of the crust, called _______________ move.
Lithospheric plate

10. Elaborate
The area where two plates border each other is known as a plate boundary.
At a ________ boundary plates collide forming mountains, earthquakes and volcanoes.
convergent

11. Elaborate
__________ can happen at converging plate boundaries if one plate is pushed deep under the other plate, resulting in volcanoes.
Subduction

12. Elaborate A ________ boundary forms when two plates move apart.
divergent
A ________ boundary forms when two plates move apart.
Most are found in the ocean and can result in the formation of mountains.
Between diverging plates fill with molten rock, sea water cools rock, and rock solidifies quickly to form mid-ocean ridges

13. Elaborate
A _______ boundary forms where two plates slide past each other which results in _________________.
transform
earthquakes

14. Elaborate
At the same time three other processes wear down, move, and form Earth’s surfaces.
Weathering changes Earth by breaking rocks and other matter into smaller particles called ____________.
___________ sweeps these weathered particles away and deposition settles these eroded pieces into new landforms in new locations.
sediment
Erosion

15. Elaborate
Weathering
________ breaks up rock into smaller pieces, much like you might do using a hammer.
Unlike a hammer, the weathering of rock in nature is a gradual process.

16. Elaborate
There are two main types of weathering: mechanical weather and _________ weathering.
chemical

17. Elaborate
Mechanical weathering takes place when rocks are broken apart by a ___________ force.
Examples of mechanical weathering include:
ice wedging-water freezing and thawing inside rocks causing them to split
abrasion-particles of sediments in wind
or water chips away at rock
and plant action -plant roots break apart rock as they grow.
physical

18. Elaborate
Chemical weathering changes the chemical makeup of rocks and ____________ by removing certain minerals from some rocks or changing the minerals into new __________.
Examples of chemical weathering include:
Oxidation-the joining of oxygen with other substances causing them to weaken and crumble
Dissolving by acids-slightly acidic water dissolves minerals more quickly than neutral water
minerals
substances

19. Elaborate
Once rocks are weathered, the remaining sediment can be ________.
Erosion takes away land in one place and deposition builds land in another.
Erosion can occur due to moving water, ice, wind or ________.
eroded
gravity

20. Evaluation Answer EQ: What processes formed the beaches of Florida?
(Use evidence from activity and reading)