Weathering_Erosion_Deposition

Mechanical weathering means...

• break down of rocks by physical changes

• break down of rocks by chemical processes

• the rock is only changing in winter

• the rock will not change ever

What is erosion?

• It means the removal of rocks and rock particles by wind, water, ice and gravity.

• It means rock particles can react with oxygen in air.

• It means rock particles can react to carbon dioxide in air.

• It means the same as weathering.

Which one below is NOT an example of mechanical weathering?

• abrasion
• freeze and thaw cycle
• acid rain
• release of pressure

Which are the three factors that affect the rate of rock weathering?

• type of rock, ocean waves, smell of the ocean

• type of rock, type of water, viscosity

• type of water, oxygen in air, frozen water

• type of rock, climate, surface area of rock

What is permeable?

• It means only big substances can pass through.
• It means certain substances can pass through because of many tiny air spaces in between.
• It means only small items can pass through because there are no air spaces inside the material.
• It means all materials can pass through.

Hot temperatures can make chemical weathering occur ___________.

• the same rate

• slower

• faster

• the following year

What is soil?

• it is a mixture of loose weathered material on Earth's surface that plants can grow on.

• It is a tightly packed and very dense material for building skyscrapers.

• it is always mixed with ocean water to support wildlife undersea.

• It is part of a volcano because it contains rock particles sometimes.

What is the order of the soil horizons from top to bottom?

• topsoil (A), subsoil (B) , C horizon, bedrock

• subsoil (B), C horizon, bedrock, topsoil (A)

• bedrock, topsoil (A), subsoil (B), C horizon

• C horizon, subsoil (B), topsoil (A), bedrock

Why are living organisms important in soil?

• Soil organisms drank all the water to create dry soil.

• Soil organisms make humus, mix the soil and create spaces for air and water.

• Soil organisms dig up rock particles so that erosion can be easier.

• Soil organisms produces more soil when they dig deeper into the soil.

Which of these is an example of erosion?

• Light shinning onto a mountain

• Rain breaking down rock

• Wind blowing away sediment

• All of the above

Tags

NGSS.MS-ESS2-2