AMSTI Pebbles, Sand, and Silt

Which rock is red, hard, and causes water to bubble?

• Granite

• Scoria

• Gravel

Which rock is white, soft, and makes marks on black paper?

• Tuff

• Sand

• Granite

Which rock is hard, grayish black, and smooth?

• Pebble

• Boulder

• Basalt

Tiny rocks are grains of _______.

• Stone

• Sand

• Gravel

Pebbles are bigger than ________.

• cobble

• sand

• gravel

Rocks are made out of __________.

• minerals

• sand

• paper

Large __________ are the largest type of rock.

• pebbles

• gravel

• sand

______ is when rocks brake apart over time to get smaller and smaller.

• Erosion

• Weathering

• Breaking

____ is a liquid that can cause rocks to weather over time.

• Corn syrup

• Glue

• Water

____ can weather rocks over time.

• Sand

• Animals

• Wind