rock cycle
our state rock
thunder egg
3 types of volcano
composite, cinder cone,shield
Weathering
•the breakdown of rocks by:
Øtypes of weathering: mechanical (physical) and chemical
Is soil a renewable or NONrenewable resource?
NONRENEWABLE RESOURCE?
we know what a mineral is but how do we know which mineral it is?
•Most minerals require several tests to be identified-we will talk about 6 properties used to ID rocks and minerals
definition of rock
A Rock is a naturally occurring solid
mixture of one or more minerals
•Which type of volcano has very broad shape with gentle slopes?
Cinder Cone
Mechanical Weathering
•the wearing away of rock by physical forces. (ice, water, waves, running water, heat, plant roots, wind, sun, temp. change)
•these are physical forces of earth
What are lichens?
algae derive nutrients(sugars) through photosynthesis which the fungi uses as food, and the fungi protect the algae from drying out
Color is the most easily observed mineral property and the least useful!
WHY
•Many minerals can change colors due to impurities, or other circumstances
Same Mineral, Different Color
3 types of rocks
Igneous
• Sedimentary
• Metamorphic
•A ____ is a steep conical hill built of mostly pyroclastic material ejected from a single vent.
Composite Volcano
Chemical Weathering
•Chemical weathering works through chemical reactions that weaken and change the rock.
•the breaking down of rocks by chemical processes. (oxygen, water, carbon dioxide, rust, acid rain, acids in lichen)
•This type of weathering affects the atoms and molecules of rocks.
How do living things contribute to soil formation?
•When living organisms die, they decompose and their organic matter is incorporated into the soil, enriching its supply of nutrients
•When living things die, the elements they are made up of return to the soil- nitrogen, carbon,
•Why is a streak test more accurate than a color test to ID a mineral ?
the way a mineral reflects light
igneous rocks how are they made
Formed from magma that pushes upward, cools and hardens
What causes volcanoes like Mt. St. Helens and Mt. Rainier?
Cascade range volcanoes
how does rock form
Rust forms on rocks when oxygen, iron, and water are present. The iron present in some rocks reacts with oxygen in the air to create rust,
List threats to soil conservation?
•Water erosion
•Wind erosion
You find a mineral while on a field trip, and you want to determine its hardness.
how would u do it?
1)How could you use your fingernail, a penny, a knife and a nail to narrow it down?
2)What if you didn’t have the penny, knife or nail but you did have a piece of quartz with you?
what makes a mineral
Minerals are chemical substances composed of atoms arranged in unique crystal structures
where is crater lake
oregon
Dolomite is a type of rock
dissolved in water. Underground caverns can develop where dolomite is common. Which type of weathering is this?
Why should we protect our soil?
•Penicillin came from Penicillium, a fungus found in soil
•Vancomycin came from a bacterium found in dirt.
•Some bacteria are becoming antibiotic resistant
•One teaspoon of soil contains millions or billions of bacteria. It's extremely difficult to grow these organisms in a lab, causing antibiotic discovery to be a slow process.
hardest mineral
TALC