Transcript Third Grade Rocks and Minerals (ppt 206KB)

Rocks &
rd
Minerals-3
Photos courtesy of Google Images
grade
A person who studies the planet earth is called a….
geologist
The study of earth materials is called….
…means a material like salt or alum disappears in water
when it is stirred.
dissolving
This sugar is _____________ in the water.
Water disappears into the air.
When water evaporates from a solution of salt and
water, only salt crystals will be left behind.
When water disappears into the air, it is called…….
These are……
Rocks have properties. Properties are characteristics that
can be observed and described.
To look at
To tell about
Rocks have the following properties:
Color: describe the color
Texture: how it feels
Size: how big or small it is
Luster: shiny or dull?
Hardness: Need to complete the scratch test to
determine if it is hard or soft.
What properties might a geologist use to describe this rock?
Color: Light brown
Texture: (since I can’t feel it, I’m guessing
smooth with sharp edges.
Size: Small like a ping-pong ball
Luster:
Hardness:
shiny
I can’t scratch it, but I’m guessing
hard.
What properties might a geologist use to describe these
rocks?
Color: Charcoal gray
Texture: (since I can’t feel it, I’m guessing
smooth with sharp edges.
Size: Large boulders
Luster:
Hardness:
dull
I can’t scratch it, but I’m guessing
hard.
Earth material composed of different minerals is a…..
A rock ingredient that can NOT be broken down into
smaller pieces is called a …….
Fiery rocks made from lava.
Rocks changed from wind, pressure or chemicals
Sand, pebbles and bits of shells that sit untouched and form into layers.
Sedimentary, Metamorphic or Igneous?
Sedimentary, Metamorphic or Igneous?
Sedimentary, Metamorphic or Igneous?
Sedimentary, Metamorphic or Igneous?
Sedimentary, Metamorphic or Igneous?
Sedimentary, Metamorphic or Igneous?
Pebble, rock or boulder?
pebbles
rocks
boulders
These are all……
When measuring rocks, geologists use these terms:
Circumeference: distance around an object
Diameter: distance across circular object
Depth: how thick an object is
When measuring rocks, geologists use these terms:
Circumeference: distance around an object
Diameter: distance across circular object
Depth: how thick an object is
This shows
This shows how thick the mattress is, so they are measuring the…..
Measuring across a circular shape is measuring the …….