Weathering and Erosion

How many people live on planet Earth?

• less 2 million
• about 7 million
• about 2 billion
• more than 7 billion

How many continents are on planet Earth?

• three
• five
• seven
• nine

Once you zoom in on planet Earth, you can see that _____

• there are seven continents
• there are a lot of people
• landforms are all the same
• it's always changing

The natural features of the Earth's surface are called _____

• landforms
• erosion
• weathering
• continents

The process that takes place as rocks are broken down into smaller pieces is called _____

• erosion
• weathering
• climate
• hammering

The process of breaking big rocks into little ones is called _____

• erosion
• mechanical weathering
• chemical weathering
• hammering

Frost, ice, the roots of plants, running water or heat from the sun can all cause _____

• erosion
• mechanical weathering
• chemical weathering
• hammering

Which process involves changes in the surface of the rock that make it change shape or color?

• erosion
• mechanical weathering
• chemical weathering
• hammering

Things like carbon dioxide, oxygen, and acids can all cause _____

• erosion
• mechanical weathering
• chemical weathering
• hammering

When rocks have been broken down and are later moved by wind, water, or ice, that's called _____

• erosion
• mechanical weathering
• chemical weathering
• hammering