constructive destructive time waist

​Science

5th Grade

Unit 6:

Constructive and Destructive Forces

​Welcome

Mrs. Allen, our principal and Mr. Dyer, our Superintendent who are observing us during what is supposed to be 5th grade spirit week.

Though this is obviously irregular, I hope this is a positive visit and not one that will have to be revisited and or debated.

Isaiah 54:17

​S5E1. Obtain, evaluate, and communicate information to identify surface features on the Earth caused by constructive and destructive processes.

b. Develop simple interactive models to collect data that illustrate how changes in surface features are/were caused by constructive and/or destructive processes.

Open Ended

What are some examples of constructive and destructive forces?

PBO

SWBAT analyze constructive and destructive processes IOT construct an argument about the cause of changes in the Earth’s surface features.

Bergozza video

Match

Match the following

• Constructive processes

• Destructive processes

• Slow change

• rapid change

• Weathering

forces that build up mountains and land masses on the Earth’s surface

forces that slowly wear away mountains and other features on the surface of Earth

Change that happens to the environment over a long period of time

Change to Earth’s surface that occurs in a short period of time

The breakdown of rock into smaller particles from the effects of wind, water, and ice

• forces that build up mountains and land masses on the Earth’s surface

• forces that slowly wear away mountains and other features on the surface of Earth

• Change that happens to the environment over a long period of time

• Change to Earth’s surface that occurs in a short period of time

• The breakdown of rock into smaller particles from the effects of wind, water, and ice

Match

Match the following

• Volcanoe

• Deposition

• Erosion

• Vegetation

A mixture of hot rocks, ash, and gases that blows through a crack in Earth’s surface

The build-up of land by depositing sediment and soil in a new location

The movement of weathered material on Earth's surface by wind, water, or ice

Plants, or all the plants found in a particular area

• A mixture of hot rocks, ash, and gases that blows through a crack in Earth’s surface

• The build-up of land by depositing sediment and soil in a new location

• The movement of weathered material on Earth's surface by wind, water, or ice

• Plants, or all the plants found in a particular area

​​Destructive Forces: processes that destroy landforms.

2 types: Slow (weathering) and Fast (Erosion) –

Ex. landslides, volcanic eruptions, earthquakes, floods

Constructive forces: forces that build up an existing landform or create a new one.

Caused by: water, gravity, wind and glaciers.

Ex: deposition, landslides, volcanic eruptions, floods

Two Types of Forces

​Here are some examples of

constructive landforms. Sanddunes,

volcano​

Deposition is the laying down of sediments after erosion has occurred.

​

It is a constructive process because it is how layers of sediment are built up and land masses are formed.

​

​Deposition

​

​

• Riverbanks

• Beaches​

• Lakes

• Deltas

• Valleys

​

​What places can you think of where deposition happens?

​

​Deposition is the ​adding of sediment in an area and creates new landforms.

​

​

​

​1. Sand dunes are formed by sediments carried by the wind.

​

​Places formed by deposition​

​

​2. River deltas are formed where rivers meet oceans by sediments carried by rivers. The sediments come from erosion upriver.

​

​Places formed by deposition​

​

​3. Beaches are formed where oceans meet land. The sediments carried by the ocean. The sediments come from the erosion of coral reefs and rocks.

​

​Places formed by deposition​

​

​4. Moraines are formed when glaciers made of collected sediments are carried by ice.

​

The sediments come from the erosion of hills and mountains.

​

​Places formed by deposition​

​

Multiple Choice

Deposition is the ________ down of sediments after erosion has occurred.

• Weathering

• Laying

• Sinking

• Eroding

Multiple Choice

Deposition is a destructive process.

• True

• False

Multiple Choice

__________ are formed when glaciers made of collected sediments are carried by ice.

• Moraines

• Beaches

• Sand dunes

• Snow

Multiple Choice

Sand dunes are formed by sediments carried by the _______.

• Water

• Ice

• Wind

• Gravity

Multiple Choice

Beaches are formed where ocean meets _______.

• Land

• Water

• the River

• the Delta

Multiple Choice

What does constructive force mean?

• destroying land forms

• land forms from volcanoes

• creating new land forms by sediment

• creating rocks and dirt

Multiple Choice

What kind of constructive process is this?

• Volcano

• Delta

• Weathering

• Mountain

Multiple Choice

What kind of constructive process is this?

• Volcano

• Mountain

• Sand Dune

• Delta

​Earthquakes can also be a constructive force as well!

​EARTHQUAKE

The entire earth is covered with several massive plates of rocks.

These plates are called Tectonic Plates.

It is filled with extremely hot magma.

The heat produced inside the earth moves the tectonic plates.

The plates slowly glide and collide with each other, which causes earthquakes.

The intensity of earthquakes is measured by Richter Scale developed by Charles F. Richter in 1935.

Earthquakes of 7 Richter or more are very powerful.

It can damage buildings, roads, bridges.

Some of the places that are highly prone to earth​quake

• Srinagar

• Shillong

• Guwahati

• Aizawal

• Kolkata

• Gandhidham

• Delhi

• Ahmedabad​

Multiple Choice

THE ENTIRE EARTH IS COVERED WITH MASSIVE PLATES OF ROCKS CALLED

• TECTONIC PLATES

• EARTHQUAKE

• PLATES

• PLATELETS

Multiple Choice

TECTONIC PLATES ARE FILLED WITH

• VOLCANO

• HOT MAGMA

• FIRE

• ICE

Multiple Choice

EARTHQUAKE ABOVE __ RICHTER OR MORE ARE REALLY POWERFUL

• 8

• 1

• 7

Multiple Choice

WHO INVENTED RICHTER SCALE

• F.CHARLES

• ISSAC NEWTON

• EINSTEIN

• F.RICHTER

Multiple Choice

What is a major destructive force. It can also be constructive as it creates mounds of rocks.

• dirt

• food

• volcanoes

• the sun

Multiple Choice

What is a destructive force?

• A natural process that destroys land

• A natural process that creates land

• A natural process where areas that are normally dry is covered in water

THE POWER OR EROSION

• Erosion is constantly changing, creating, and erasing features on Earth's surface.

• Erosion happens through wind, water, and glaciers.

EROSION CAN BE SLOW

• Erosion can take hundreds of thousands - even millions - of years.

• Rainwater can change a hillside.

• Wind can slowly scrape the rocks off a mountain.

• Millions of tons of rock and gravel can be picked up and moved by icy glaciers.

EROSION CAN BE SUDDEN

• Strong winds and large waves from hurricanes can make beaches disappear.

• Floods can wash away soil from hill sides and change the path rivers follow.

EROSION CAN BE HELPFUL

• Soil is made from weathered rocks.

• Erosion helps move soil from one place to another.

• Wind erosion deposited silt on the Great Plains. Silt helps make excellent soil for planting crops.

• Water erosion carries sediments to river deltas, creating rich farmland.

SOMETIMES HUMANS DON'T HELP

• People have sped up erosion in some places.

• Farming can cause soil erosion because of poor farming methods.

• Cutting down trees cause erosion.

• Tree roots help hold soil in place, but without trees, rainwater can wash soil away.

THE SILENT PROBLEM - Soil Erosion

• Overgrazing of land by cattle can even cause erosion.

• Exposed soil can get carried away by the wind.

• Rich soil takes thousands of years to form.

• Soil is being lost faster than nature can replace it.

Multiple Select

How does erosion happen? Select all answers that apply.

• Wind

• Water

• Glaciers

• Earthquakes

Multiple Choice

Wind can slowly scrape rocks off a mountain .

• True

• False

Multiple Choice

What can cause beaches to disappear?

• Volcanoes

• Hurricanes

• Cutting down trees

• Glaciers

Multiple Choice

What can speed up erosion?

• Rivers

• Glaciers

• People

• Plate tectonics

​What is weathering?

What is Weathering?

• The natural breakdown of Earth's surface

• Physical or Chemical

Physical (Mechanical) Weathering

• Substance breakdown

• Does not effect chemical composition

Chemical Weathering

• Chemical reactions between rocks, the air, and water.

• Water is able to dissolve most minerals.

• Rocks can take YEARS to CHEMICALLY weather!

Multiple Choice

What is Weathering?

• When it rains or snows.

• The movement of rocks or dust.

• Any natural process that changes Earth's surface.

• I have no clue.

Multiple Select

What types of weathering are there?

• Mental

• Physical

• Astronomical

• Chemical

• The rainy type

Multiple Choice

If a rock were to physically weather, what would it do?

• Breaks down over time.

• Grows bigger.

• Turns into ash.

• Becomes invisible.

Multiple Choice

If a rock weathers chemically, what is really happening?

• The rock flies.

• The rock rolls.

• It dissolves.

• It Becomes a liquid.

Multiple Choice

What is weathering?

• a type of climate

• the movement of rock pieces from one place to another

• the breaking down of rock into smaller pieces

• a force that pulls pieces of rock downhill

Multiple Choice

The Grand Canyon is a result of which of these destructive processes?

• earthquake

• erosion

• tornadoes

• volcanoes

Multiple Choice

The picture here shows a landslide. What can you infer from the picture? Remember to look at the picture!

• Landslides are a destructive process that break apart the surface of the earth.

• Landslides are a constructive process that build new mountains on the surface of the earth.

• Landslides are caused by volcanic eruptions,

• Landslides are helpful to road crews.

Open Ended

1. How are constructive and destructive forces alike?

2. How are they different?

*Take your time to create a well written sentence.