Download the powerpoint to use for the worksheet.

1. z
Igneous,
Metamorphic and
Sedimentary
rocks.
EARTH AND SPACE SCIENCE

2. z
Objectives
 List 3 key characteristics of sedimentary, igneous or
metamorphic rocks on a worksheet.
 Describe in a brief paragraph how each type of rock
(metamorphic, igneous and metamorphic) is formed on a
worksheet.
 Identify from a photo, the type of rock - sedimentary, igneous
and metamorphic rocks.

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Today’s Lesson
 1. PowerPoint presentation
 2. Worksheets
 3. Group poster making
 4. Poster presentations

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Igneous Rocks
How it is formed:
 = formed when molten rock (magma/lava) cools to a solid state.
Characteristics:
 Primary rocks (formed from magma and begin the rock cycle)
 Does not have fossil deposits.
 Contains crystals
 Can be glassy or course
 Can be intrusive or extrusive
 Intrusive = form below the earths surface and magma cools slowly resulting in large
crystals.
 Extrusive = formed above the earths surface by lava erupting from volcanoes , they cool
quickly resulting in small crystals.

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Igneous Rocks - Examples
Intrusive:
 Granite
 Diorite
 Pegmatite
 Kimberlite
 Gabbro
Extrusive:
 Pumice
 Basalt
 Tuff
 Obsidian
 Rhyolite

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Metamorphic rocks
How it is formed:
 = formed when other rocks are subjected to high heat, high pressure, hot
mineral rich fluids or likely a combination of these factors. This occurs deep
within the earth where tectonic plates meet.
Characteristics:
 Contains course crystals
 Visible layers/bands
 Rarely has fossils
 Rarely has pores or openings

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Metamorphic Rocks - Examples

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Sedimentary rocks
How it is formed:
 = Formed when sediments of older rock (broken down bits of rock) and plant and
animal remains settle on top of each-other, and are then pressed together to from new
rocks.
Characteristics:
 Not crystalline
 Many layers
 Soft
 Often contains fossils
 Grainy, sandy texture

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Sedimentary Rock - Examples

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Worksheets
 Complete your worksheets using the PowerPoint, your textbook
and google on your device if needed.
 Ask me if you have any questions!

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Group poster making!
 Create a colourful poster on igneous, metamorphic or
sedimentary rocks.
 Include how the rock is formed, characteristics, examples and a
sketch of a type of the rock.
 You have 12 minutes!
 Then you will do a quick 2-minute presentation of your poster to
the class.

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Any Questions?
 Challenge for next lesson: take a photo of a rock you see
outside, bring the photo into class next lesson and try to identify
the rock type!
 Thankyou, see you next lesson!