G4 - Revision

Solar Energy
Solar energy is the energy in sunlight.

Solar energy can be used to make electricity,which is the kind of power many machines use. Other examples of sustainable sources of energy are wind and moving water.
https://www.youtube.com/watch?v=GzQmo_Wd2Sw

Wind Energy
wind energy is a form of renewable energy that harnesses the power of the wind to generate electricity.
https://www.youtube.com/watch?v=-8-9j3mXlYE

Hydropower
Hydropower, is one of the oldest and largest sources of renewable energy, which uses the natural flow of moving water to generate electricity.
https://www.youtube.com/watch?v=dNTVItxeyLU&t=52s

• Sometimes a country or region does not have enough resources to meet the needs of all the people who live there. This is called scarcity.

• Scarcity Affects the ability of communities to use certain natural resources.

  
  

Scarcity

Land Scarcity

Land scarcity happens when overcrowding leads to a shortage of land that people can own or use.

Food scarcity

Food scarcity is when there is not enough food for people to eat.

• Water scarcity is a regional problem in the Middle East.

• The Arabian Peninsula is surrounded by salt water, but people need fresh water to survive.

• Fresh water is not always plentiful, or found in great supply, in The Arabian Peninsula.

  
  

Water Scarcity

Desalination
Desalination is the process of taking salt out of salt water to make freshwater. Scientists have discovered a way to use steam and pressure to separate salt from water.
https://www.youtube.com/watch?v=mUtYUTTC_Bg

• Building dams can help people manage the availability of water.

• Dams Stop water from flowing the way it does naturally.

• People can use a dam to send water in a different direction. This means water can be directed to dry regions that need it.

• https://www.youtube.com/watch?v=OUpZHFx-GxM

  
  

Dams

• People in the Middle East have been building dams for thousands of years.

• One of the largest dams in the world today is in Egypt.

• The Aswan High Dam Controls the flow of water in the Nile River. It helps protect people and crops from flooding.

• https://www.youtube.com/watch?v=lipxPcEf99E

  
  

The Aswan High Dam

• South America is the fourth-largest continent on Earth.

• It is home to more than 400 million people who live in 12 countries.It has many habitats that include mountain ranges, plains, plains deserts, and rain forests.

• https://www.youtube.com/watch?v=ynIrxhi0iHA

  
  

South American

• The Yanomami people live in the rain forests of northern Brazil in an area called the Amazon Basin.

• The Yanomami use natural resources in this habitat to survive. They hunt deer and grow vegetables in gardens. They use wood from trees to build shelters,weave baskets,and make fire. Before they use too many of an area's natural resources, they move to a new plot of land. Then the land where they lived can return to its natural state.

  
  

The Yanomami People

• Rio deJaneiro is a large city on the coast of Brazil. The area was once a mountain forest full of wildlife. In the 1500s, settlers came.They Cut down the trees and plowed the soil. They planted sugar and coffee.Less than 10 percent of the original forest remains. More Than 15 million people live in Rio de Janeiro today.

• The land has changed in many ways to support the large number of people who live there.

  
  

Rio DeJaneiro

Multiple Choice

Solar energy is the energy in ________

• water

• Sunlight

• wind

Multiple Choice

Fresh water is not always plentiful, or found in great supply, in The Arabian Peninsula.

• True

• False

Multiple Choice

Building dams can help people manage the availability of water.

• True

• False

Multiple Choice

South America It is home to more than 400 million people who live in 12 countries

• True

• False

Multiple Choice

Rio deJaneiro is a large city on the coast of Brazil.

• True

• False

Multiple Choice

One of the largest dams in the world today is in Egypt.

• True

• False

Fill in the Blank

_______ is the fourth-largest continent on Earth.

Fill in the Blank

The Yanomami people live in the rain forests of northern Brazil in an area called _______