History of the Earth

Which best describes a fossil that helps determine the relative age of a rock layer?

• trace fossil
• index fossil
• radioactive fossil
• unconformity fossil

Fossil remains of a trilobite are most likely to be found in which type of rock?

• igneous
• volcanic
• sedimentary
• metamorphic

Which theory does evidence found in sedimentary rocks best support?

• Most organisms from Earth's history still exist.
• Organisms have not changed significantly over time.
• All organisms from Earth's history have become extinct.
• Organisms have evolved from simple to complex forms.

Many fossils of large amphibians were found in an area that is currently barren desert. Which is most likely true?

• The climate of the area was once much wetter than it is now.
• Amphibians were once better at surviving in dry environments.
• The amphibians migrated there after a catastrophic event destroyed their habitats.
• The amphibians are not native to the area and their bones were brought there by other animals.

Which time period on the chart was the longest?

• Permian
• Cambrian

By the end of this era, reptiles became dominant.

• cenzoic
• mesozoic
• paleozoic
• precambrian

Dinosaurs ruled this era.

• Paleozoic 
• mesozoic
• precambrian
• cenozoic

Mass extinction of the dinosaurs marks the end of this era.

• Mesozoic 
• Cambrian
• Jurassic 
• Cenozoic 

Because of the extinction of dinosaurs this kingdom thrived.

• Reptiles
• mammals
• amphibians
• none of these

Flowering plants dominate during this era.

• Cenozoic 
• Mesozoic 
• cambrian