Week 2 Earth Structure
Task 1
Order the materials from least dense to most dense.
Discuss how this order of density relates to the structure of the earth.
Watch the video embedded below and make a diagram to summarise the information.
Write down any questions that you could ask to clarify ideas.
Order the materials from least dense to most dense.
Discuss how this order of density relates to the structure of the earth.
Watch the video embedded below and make a diagram to summarise the information.
Write down any questions that you could ask to clarify ideas.
Task 2 Watch the embedded video below
DYNAMIC EARTH: Earth Structure
http://museumvictoria.com.au/melbournemuseum/discoverycentre/dynamic-earth/videos/earths-internal-structure/
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Task 3 Review of Rock-Forming Minerals and Igneous Rocks
Observation of the Igneous rock Granite.
Use a binocular microscope to observe the granite sample. Note the colours, crystal size and any other features that you can. Use the worksheet below to make detailed observations of the common rock-formimg minerals. Measure the mass and volume of each mineral and then calculate the density of the minerals using the formula; density = mass / volume (g/cm3) |
Task 4 Density of minerals and Rocks
In two separate tables;
a) organise the minerals from low density at the top to high density at the bottom.
b) organise the rocks from low density at the top to high density at the bottom.
Results
Task 5 Great Iron Catastrophe and Planetary Differentiation
Listen to the story of "Our Hollow Earth"
Complete the note-making tables.
Density of rocks and minerals
Complete the note-making tables.
Density of rocks and minerals
Task 6 Primary evidence for earth structure
Journey to the Center of the Earth
A UCSB geochemist uses helium and lead isotopes to gain insight into the makeup of the planet’s deep interior. |
Evidence for sea floor spreading
The earth's magnetic field.
The ‘north pole’ — that is, the direction of magnetic north — was reversed a million years ago. This map shows how, starting about 789,000 years ago, the north pole wandered around Antarctica for several thousand years before flipping 786,000 years ago to the orientation we know today, with the pole somewhere in the Arctic. |
Task 7 Earth Interior and discontinuities
GEOLOGICAL DISCONTINUITY
A discontinuity is a plane or surface that marks a change in physical or chemical characteristics in a soil or rock mass.
The Mohorovicic Discontinuity. Use the button above to research this discontinuity and to explain its significance. |