1. What is Earth made of?

2. Rocks
How do rocks
form?
Igneous
Rocks
Sedimenta
ry Rocks
Metamorph
ic Rocks
Cycle

3.  Rocks are found in the thinnest layer
of the lithosphere called crust.
 You can find rocks everywhere, in
rivers, seas, oceans, and mountains
as well as in plains.
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4. Like living things, rocks undergo
cycles.
This cycle involves heat,
pressure, and chemical reaction
that lead changes and
formation.
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5.  Igneous rocks are formed from magma.
 May occur underground or above the surface.
 Cools slowly (underground)
 Cools quickly (above)
 Intrusive igneous rocks formed large crystals.
 Extrusive igneous rocks formed small fine
crystals.
 Color: white, gray, green and red
 Strength: used for constructing roads; hard and
tough
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6.  are formed by means of weathering
 heat, wind, rainwater,, chemical reaction, and even
living things can break igneous rocks into sediments
 These agents of weathering will lead the sediments
at the bottom of rivers, lakes and oceans.
 Particles of rocks and shells will be deposited and
settled for a period of time and will form
sediments.
 After a long period of time, these deposited
materials are cemented to each other to form what
is so called sedimentary rocks.
 These rocks can also provide information about
ancient life.
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7.  are formed due to heat inside the earth
 These heat is generated from
pressure, friction, and chemical components.
 Rocks form crystals and increase their size
when heated.
 These rocks are denser and more crystalline
compared to sedimentary and igneous rocks.
 Heat inside the Earth can change
metamorphic rocks into magma.
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