Amplify Science Grade 4 Unit 3 Chapter 1 Earth's Features

small pieces of rock, such as silt or sand

• sediment

• sedimentary rock

• model

• inference

a clue about life from the past that is preserved in rock

• sediment

• geologist

• fossil

• rock layer

Geologists study rocks and fossils to learn more about what a place was like in the past

• True

• False

the fossil belonged to a dinosaur that walked on four legs

• observation

• inference

Fossils form very quickly which is why we are able to find them on Earth

• True

• False

Finally, the layer gets ____ as more sediment compacts and cements

• tougher

• taller

• wider

• thicker

the fossil came from a large dinosaur

• observation

• inference

Next, the sediment at the bottom _______

• compacts

• disappears

• grows

• cement

To stick together in the process of forming rock

• cement

• compact

• fossil

• rock layer

Then more _____ builds up and pushes down on the sediment below

• water

• sediment

• rock

• fossil