Categories: All - types - regions - natural - disasters

by Vanessa Vettese 5 months ago

171

Natural Systems:

Natural systems and disasters significantly impact various aspects of life, including people, plants, animals, and buildings. These events are primarily driven by natural activities within the Earth'

Natural Systems:

Natural Systems:

Natural Regions and Resources:

Why care?
Are resources important enough to Canada that we should CARE about our relationship with the earth.
Classifying Natural Resources:
Natural resources are classified as either biotic and abiotic

Antibiotic: Non-living materials including materials including minerals and metals.

Nickel

Silver

Diamonds

Gold

Biotic: Resources extracted from the earth or grown.

Natural gas

Fruit

Timber

Petroleum

Non-renewable resource:

Formed so slowly in nature that they are considered gone forever after they have been used. E.g, minerals and soils.

Renewable resource:

If managed wisely, can be replaced or used again. E.g. plants and animals

Flow resource:

Neither renewable nor non-renewable, must be used when and where they occur or they are gone.

The Rock Cycle:

Types of Rocks:
Metamorphic Rock:

Schist

Marble

Gneiss

Heat and pressure do not change the chemical makeup of the parent rocks but they do change the mineral structure and physical properties of those rocks.

Through the metamorphic process, both igneous rocks and sedimentary rocks can change into metamorphic rocks, and a metamorphic rocks, and a metamorphic rock can change into another type of metamorphic rock.

Metamorphic Rock is formed when rocky material experiences intense heat and pressure in the crust of the earth.

Sedimentary Rock:

Cementation (where the sediment becomes cemented into rock)

Compaction by rock, ice or other sediments

Deposition by water, wind or ice

Erosion by water, wind or ice

form at or near the earth's surface at relatively low temperatures and pressures primarily by:

Igneous Rocks:

Can form underground, where the magma cools slowly or igneous rock can form above ground, where the magma cools quickly.

Magma is a hot liquid made of melted minerals. The minerals can form crystals when they cool.

Examples:

Obsidian

Basalt

Granite

Is formed when magma cools and makes crystals.

Plate Tectonics

Types:

Earthquakes and volcanoes tend to happen along plate boundaries.

Earthquakes and Volcanoes

Earthquakes and volcanoes frequently occur where the edges of the earth's plates are colliding or moving away from one another.

Every year there are about 30,000 earthquakes (Seismologists study these) that are strong enough to be felt)

Surface of the Earth is a thin layer of moving plates, and below these plates is material that is also in motion

Iron and Magnetic Field

When the rock hardens, the iron particles are aligned forever and show a record of changing magnetism and expanding oceanic crust.

The iron inside the hardened magma that rises from within the Earth lines up with the current magnetic filed

Age of Ocean Floor

The age of the ocean floor suggests that the continents have been drifting apart for years. As you move away from the plate boundaries the age of the crust is older.

Evidence of Ice sheets

Ice sheets developed in areas that we recognize as tropical today and too warm for show and ice. This suggests that one time the continents were located closer to the South Pole

Mountain Ranges

The appalachain mountains in North America and the Caledonian Mountains in Europe seem to have been broken because they are the same AGE and type of rock.

Fossils

Fossils of the same creatures were found on two continents that are very far away from each other and can not travel over large bodies of water

Puzzle Piece

The continents fit together like a jigsaw puzzle

Earth is composed of:
Crust

A layer from 4-25 miles thick consisting sand and rock.

Mantle

A rock layer about 1,750 miles thick that reaches about half the distance to the center of the earth. parts of this layer become hot enough to liquify and become slow moving molten rock or magma

Outer core

A mass of molten iron about 1,425 miles that surrounds the solid inner core. Electrical currents generates from this area produce the earth's magnetic

Inner core

A mass of iron with a temperature of about 7000 degrees F. Although such temperatures would normally melt iron, immense pressure on it keeps it in a solid form. The inner core is approximately 1,500 miles in diameter

Natural Disasters

Causes:
They are caused from many different reasons . For example soil erosion, seismic activity, tectonic movements, air pressure, and ocean currents etc. Natural activities like disasters taking place in the earth's crust, as well as surface, are the main reasons for these disasters
Where?
Most likely takes place all around the world but mostly in:

Hawaii

China

Indonesia

Oman

New Orleans

Turkey

Iran

Damages/harms

Buildings

To people

Types of disasters
Tsunami
Earthquakes
Hurricanes
Main Ideas
Why it happened?
Where it happened?
What happened?
Type of disaster

Forces Building up and Wearing down the Earth

Tornadoes:
Where do tornadoes happen?

Tornadoes happen in every continent of the world.

In the US mostly tornadoes happen in Texas, Kansas, Oklahoma, and Florida.

What caused a tornado?

As the tornado moves forward, this warm wind rushing upwards can pickup any objects in its path.

The winds swirl and the warmer air below rushes upwards at a terrific speed.

When a cold wind high up meets warmer air and warmer winds lower down.

After a tornado:

Use a flashlight to inspect your home/area.

Watch out for downed power line.

Check for injured or trapped people, without putting yourself in danger.

Stay indoors until it is safe to come out.

During a tornado:

If you are outside, go to a ditch or crouch down and cover your head.

Get out of cars. Do not try to out run a tornado in your car, leave it immediately.

Go to a basement. If you do not have a basement, go to a room that does not have windows or the lowest floor.

Before a tornado:

Prepare a disaster kit for the car at home

Make sure you know which country or town you live in.

Have a disaster plan. Make sure everyone knows where to go in case a tornado threatens.

Acid Rain
Burning Coal/oil/turf

Releases Nitrusoxide and Sulphur dioxide (harmful toxins)

Mixes with the clouds

Rain that falls is slightly acidic

Effects:

Reduces crop yields

Kills fish

Kills trees

Volcanoes
Secondary Impacts

Acid rain

Businesses destroyed

Lack of money

Causing Unemployment

Lack of emergency aid

Area unsafe

Roads blocked

Shortage of Food

Shortage of clean-water

Psychological Trauma

Lost Homes

Death

Fires

Mud-flows

Rain

Volcanic Material

Primary Impacts

Carbon dioxide suffocation

Animals

Plants

People

Water supply contaminated

Plants damaged

People injured/killed

Falling Rocks

Lava flows

Pyroclastic flows

Roads damaged

Buildings destroyed

Geological Eras

Cenozoic Era
Tertiary

Uintatherium, plesiadapis, heractherium (mammals)

First monkeys and apes, flowering plants most common, grasses

66-1.8 million years ago

Spans from 66 million years ago to the present
Mesozoic Era
Cretaceous

Triceratops, magnolia, tyrannosaurus rex

First flowering plants, end of the period mass extinction of dinosaurs and many other organisms

144-66 million years ago

Paleozoic Era
Carboniferous

Cockroach, dragonfly, coal forest

Tropical forests, insects and amphibians, earliest reptiles.

360=286 million years ago

Permian

Largest mass extinction in geologic history

Seed plants, insects, reptiles, most sea animals and amphibians become extinct

286-245 million years ago

Devonian

Devonian forest, shark, lung fish, bony fish

Many types of fishes, early amphibians, ferns and cone plants

408-360 million years ago