4th Grade Social Science Unit 3

An ocean is

• fresh water flowing over the ground

• a large enclosed body of fresh water

• a large body of salt water, such as the Pacific or Atlantic

A sea is

• a large body of salt water, smaller than an ocean, such as the Mediterranean or the Caribbean

• a natural flow of water underground that reaches the surface

• a large enclosed body of fresh water

A lake is

• a large body of salt water such as the Pacific

• a large enclosed body of fresh water

• fresh water flowing over the ground, usually towards another body of water

A river is

• a large body of salt water

• a natural flow of water underground that reaches the surface

• fresh water flowing over the ground, usually towards another body of water

A spring is

• a natural flow of water underground that reaches the surface

• a large enclosed body of fresh water

• a large body of salt water, smaller than an ocean, such as the Mediterranean or the Caribbean

A river starts at the

• basin

• tributary

• source

A river that flows into another river is a

• lower course

• tributary

• spring

A river meets salt water and ends at the

• source

• bank

• mouth

A river starts in the

• upper course

• middle course

• lower course

A river ends in the

• upper course

• middle course

• lower course