GeoBlast: Test Your Knowledge

Where does most of the Earth's freshwater come from?

• Oceans

• Rainfall

• Salt lakes

• Underground rocks

What is the starting point of a river called?

• Mouth

• Source

• Stream

• Estuary

How do rivers help people?

• By stopping rainfall

• By providing water for farming and drinking

• By making mountains higher

• By blocking coasts

What makes the River Nile special?

• It is the widest river in the world

• It flows from south to north

• It is the longest river in the world

• It has no tributaries

What is one reason the River Amazon is important?

• It flows through the rainforest

• It starts in the Pacific Ocean

• It has no wildlife

• It is dry most of the year

What problem affects the Murray River in Australia?

• Snowfall

• Volcanic activity

• Pollution and overuse of water

• Glaciers

What is a common cause of river pollution?

• Mountain air

• Waste from factories and homes

• Rainstorms

• Fish populations

How are most mountains formed?

• By ocean currents

• By tectonic plates pushing together

• By forest fires

• By rainfall

What weather is often found in mountain regions?

• Hot and humid all year

• Always dry

• Cold with snow and strong winds

• Always sunny

Why are the Himalayas important?

• They are underwater

• They are made of sand

• They contain the highest peak in the world

• They are in Africa