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

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

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

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.

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

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

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

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

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

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

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

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

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.

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

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

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

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

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