Post on 28-May-2020
transcript
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Become a Geologist!Make A Rock Portfolio
The science of studying rocks is called geology. Scientists who study rocks are called geologists.
In this investigation, you will become a geologist. You will observe, sort and categorise rocks according to their properties. You will make property lists and Venn diagrams.
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Equipment:• A selection of up to 10 rocks (or rock pictures)• A camera or phone• A ruler• A magnifying glass or hand lens• A coin• Some water and a teaspoon or dropper
A property is a
quality that helps to describe what an object or
substance is like – for example, shiny or dull, rough or smooth.
If you don’t have access to many or any rocks, you can use the rocks picture sheet
on the last page of this download.
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• Where did you find the rock?
• How do you think it got there?
• How would you describe its colour?
• How does it feel?
• Can you scratch it with your fingernail? (If so, it’s soft.)
• Can you scratch it with a coin? (If not, it’s hard.)
• If you drop a little water on the rock does it run off or does the rock absorb it?
• Can you see grains, crystals, holes or another interesting feature?
Did you know that geologist Friedrich Moh developed a
hardness scale for rocks, called Moh’s Scale? He knew that
observing properties such as how hard or soft a rock was would
help geologists understand what it was made of and how it formed. When scratching your rocks with a coin, think about how you could put your rocks in order according to hardness. Why might a rock’s hardness be useful information?
Method:1. Draw a picture or take a photo of a rock. Alternatively, cut out one of the rock pictures
from this download. Stick the picture into the first Rock Profile in your Portfolio. 2. Measure and record the size of your rock and describe its shape. 3. Now carefully observe your rock and use the rock questions below to describe
its properties. Add your observations to your Rock Profile using words from the Rock Word Bank.
4. Now examine another rock. How is it similar to or different from your first rock?5. Complete as many Rock Profiles in your Portfolio as possible.
Rough/smoothDull/shinyHard/softBumpy/jaggedPolishedSingle coloured Multicoloured
Crystalline (has crystals in it)GrainyCrumblySandyStriped/spottyShimmeryTranslucent
Transparent FlatRoundedPitted (tiny holes all over it)Absorbent/non-absorbent
Rock Word Bank
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Rock Property PortfolioRock Property Profile 1
Name of Rock: Properties
(insert picture/drawing of rock here
Rock Property Profile 2
Name of Rock: Properties
(insert picture/drawing of rock here
Rock Property Profile 3
Name of Rock: Properties
(insert picture/drawing of rock here
Rock Property Profile 4
Name of Rock: Properties
(insert picture/drawing of rock here
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Rock Property PortfolioRock Property Profile 5
Name of Rock: Properties
(insert picture/drawing of rock here
Rock Property Profile 6
Name of Rock: Properties
(insert picture/drawing of rock here
Rock Property Profile 7
Name of Rock: Properties
(insert picture/drawing of rock here
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Rock Property PortfolioRock Property Profile 8
Name of Rock: Properties
(insert picture/drawing of rock here
Rock Property Profile 9
Name of Rock: Properties
(insert picture/drawing of rock here
Rock Property Profile 10
Name of Rock: Properties
(insert picture/drawing of rock here
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Grouping Rocks Using a Venn Diagram
One way that we can group rocks is by using a Venn diagram.
Choose two rock properties as titles for each circle in your Venn diagram. For example, the titles could be “Single Coloured” and “Smooth”.
Rock Properties Venn Diagram
Now use your maths and science skills to sort your rocks using Venn diagrams.
Do you notice any patterns between property features?
Do shiny rocks tend to be smooth as well?
Do rough rocks tend to be multicoloured?
Could this tell us more about what the rocks are made of?
Think about what your Venn diagram is showing you about your groups of rocks.
Single Coloured Smooth
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Rocks Picture Sheet
Igneous RocksIgneous Rocks
Red graniteAndesite
PeridotitePegmatite
Sedimentary RocksSedimentary Rocks
DolomiteBreccia ChertBanded ironstone
Metamorphic RocksMetamorphic Rocks
Hornfels Suevite
Jaspillite
Serpentinite