The Rock Cycle

The rock cycle involves changing the 3 types of rock from [blank_start]one to another[blank_end]

WEATHERING is [blank_start]breaking down[blank_end] rocks into [blank_start]smaller[blank_end] bits

Rainwater contains dissolved [blank_start]gases[blank_end] from the [blank_start]air[blank_end] that make it slightly [blank_start]acidic[blank_end]

Chemical Weathering happens when the slightly acidic rain falls onto the rocks it reacts with the [blank_start]minerals[blank_end] in those rocks

The new substance formed in Chemical Weathering may be [blank_start]soluble[blank_end] (able to dissolve) and [blank_start]washed away[blank_end] or they may be more [blank_start]crumbly[blank_end] than the original rock

Trees can also help break up rocks. Plant roots can grow into the [blank_start]cracks[blank_end] in the rocks. When the roots grow [blank_start]bigger[blank_end] they make the cracks [blank_start]wider[blank_end] and the rock can [blank_start]break apart[blank_end]

There are [blank_start]2[blank_end] types of Physical Weathering

Rocks [blank_start]expand[blank_end] (get bigger) and [blank_start]contract[blank_end] (get smaller) when the [blank_start]temperature[blank_end] changes. If the this happens to the rock over and over again, [blank_start]cracks[blank_end] can form. This is called [blank_start]onion skin[blank_end] weathering

When water gets into cracks in rocks and then [blank_start]freezes[blank_end], water [blank_start]expands[blank_end] as it [blank_start]freezes[blank_end], causing the cracks to get [blank_start]bigger[blank_end]. This is called [blank_start]freeze thaw action[blank_end]

EROSION is the [blank_start]movement[blank_end] of the broken bits of rock away from the site of [blank_start]weathering[blank_end]

TRANSPORTATION is when the broken bits of rock get [blank_start]carried away[blank_end] usually by [blank_start]wind[blank_end] or [blank_start]water[blank_end].

ABRASION is when the bits of rock [blank_start]knock against each other[blank_end] while getting transported.

DEPOSITION is the laying down of the [blank_start]sediments[blank_end]

BURIAL, COMPRESSION AND CEMENTATION is [blank_start]squeezing[blank_end] and [blank_start]compressing[blank_end] the layers, eventually forming [blank_start]Sedimentary[blank_end] Rocks

HEAT AND PRESSURE is the further [blank_start]sqashing[blank_end] and [blank_start]heating[blank_end] turns the rock nto [blank_start]Metamorphic[blank_end] Rocks

MELTING intense heating makes the rock partially [blank_start]melt[blank_end], changing it to [blank_start]magma[blank_end]

COOLING solidification of the molten rock to form [blank_start]Igneous[blank_end] Rocks

Glaciers are rivers of [blank_start]ice[blank_end]

Glaciers move very slowly but they can transport very large pieces of [blank_start]rock[blank_end]

Rocks carried by glacies also [blank_start]scrape away[blank_end] bits of rock from the land they are moving over

Rocks below the glacier are [blank_start]abraded[blank_end] (scraped away) into very small pieces

Once the rock is abraded, the rock becomes [blank_start]smoother[blank_end] and [blank_start]rounder[blank_end] as all the sharp edges are scraped off