4th Grade Unit 7 Rocks and Fossils

Front

The youngest layer of rock is always on the _____________.

Back

top

Front

Petrified trees in the desert are evidence that there was once far more ____________ in the area.

Back

water

Front

Earthquakes can change land very _____________.

Back

quickly

Front

What is the most reliable way to judge the age of a rock by layer?

Back

The lower the layer, the older the rock.

Front

Which statement is true about fossils?

Back

Fossils can tell us what animals looked like millions of years ago.

Front

What are fossils?

Back

Fossils are the preserved remains or traces of ancient organisms.

Front

What does the term 'sedimentary rock' mean?

Back

Sedimentary rock is formed from particles of sand, shells, pebbles, and other fragments of material.

Front

What is the rock cycle?

Back

The rock cycle is the continuous process of rock formation, breakdown, and reformation.

Front

What is erosion?

Back

Erosion is the process by which soil and rock are removed from the Earth's surface by natural processes.

Front

What is a mineral?

Back

A mineral is a naturally occurring, inorganic solid with a definite chemical composition and crystalline structure.