4th Grade Earth Science Review

Some volcanoes are shaped like a ___________ because they are made from runny lava that spreads out widely.

• pyramid
• cone
• shield
• sword

Weathering is usually caused by

• ice
• water
• wind
• all of these

Most volcanoes in the world can be found along the ___________________ surrounding the Pacific Ocean.

• prairies
• cities
• desert
• coast

The process of breaking rock into sediment is called 

• erosion
• friction
• velocity
• weathering

Rocks at the bottom of a mountain tend to be _________ than the ones at the top because as the rocks tumble down a mountain, the edges become more ___________.

• rounded, rounded
• sharp, sharp
• bigger, large
• soft, melted

Coal and oil are examples of 

• renewable resources
• fossil fuels
• free energy
• solar energy

In a canyon, these layers are the oldest layers.

• the top layers
• the bottom layers
• the middle layers
• the darkest layers

Sedimentary rocks are formed when 

• you rub them on a white tile
• they are melted
• layers of rocks are squeezed and stuck together

These are formed when layers of dead plants or animals covered by sediment and water are changed through heat and pressure over thousands of years

• antiques
• emeralds
• fossil fuels
• slate rocks

Fossils can usually be found in 

• igneous rocks
• metamorphic rocks
• sedimentary rocks
• diamonds