Week 13 Science

Front

What is a desert sand dune?

Back

A large hill of sand found in a desert, usually with no plants.

Front

What is a beach sand dune?

Back

A hill of sand found near the ocean, often with plants.

Front

What is erosion?

Back

The wearing away of rocks and soil by natural forces like wind and water.

Front

What is a canyon?

Back

A deep valley with steep sides, often carved by a river.

Front

What happens to rocks when water flows over them?

Back

They get worn down and change shape.

Front

What do ripples in sand dunes show?

Back

The direction of the wind.

Front

What is sand?

Back

Tiny pieces of rock and minerals that can be found on beaches and in deserts.

Front

What causes sand dunes to form?

Back

Wind blowing sand into piles.

Front

What is a river?

Back

A large, flowing body of water that usually empties into an ocean or lake.

Front

What is a valley?

Back

A low area of land between hills or mountains.