Earth changing surface

Divergent boundary

Boundary between plates where they move apart

Convergent boundary

One plate is pushed under another and sinks into the mantle

Transform boundary

Play slide past each other

Subduction

When one tectonic plate moves under another

Convection

Circulation and fluids caused by differences in density and thermal energy

Weathering

Mechanical or chemical process that changes earth surface overtime

Erosion

Movement of weathered material sediment from one location to another

Deposition

Laying down or settling of eroded material

Physical (mechanical) weathering

Breaks rock without changing its composition

Chemical weathering

Changes the rocks composition

Convection currents in mantle

Heat from earth core causes the mantle material to rise in sync, moving tectonic plates

Mechanical verse chemical weathering

Mechanical brake small rock into pieces chemical changes the rock composition

Example, examples of physical weathering

1. Ice wedging-water freezes and cracks and expands

2. plant root growth-roots grow and split rocks

Examples of chemical weathering

1. Oxidation (rusting)-oxygen reacts with iron

2. Acid rain-dissolves rocks like limestone

Gravity

Pulls rocks downhill (landslides rock Falls) causes rocks to break and move

Wind

Blow sand and particles against rocks wearing them down

Water

Rivers and rain carry away soil and rock, eroding land, and depositing settlement

Ice

Glacier scrape rocks beneath them and drop material when they melt