Changes Affect Living Things/ Living Things of the Past

The remains or trace of an organism that lived long ago is called...

• fossil

• species

• extinct

• endangered

Which event MOST LIKELY led to the extinction of the dinosaurs?

• New predators for the dinosaurs appeared

• An object from space crashed into Earth and the resulting dust blocked sunlight.

• Pollutants were added to the environment

• They left

If a species in no longer found living on Earth it is

• pollutants

• extinct

• species

• endangered

Tags

NGSS.MS-LS4-1

Something that is in danger of disappearing, or becoming extinct is called

• species

• endangered species

• fossil

• extinct

Tags

NGSS.MS-LS4-1

Most saber-toothed cats lived

• with the dinosaurs

• during the Ice Age

• before dinosaurs

• in the 18th century

Which can help scientists learn about animals from the past?

• fossils

• photographs

• rocks

• lakes

Which of the following best describes why the saber-toothed tiger became extinct?

• The cat shrunk in size until there was nothing left.

• The cat was unable to find food.

• The cat moved to another continent

• The cat is still alive today.

Which layer of rock are the oldest fossils usually found?

• bottom layer

• top layer

• middle layer

What would cause an ecosystem to change quickly?

• a gradual climate change
• a lake becoming a marsh
• a lake drying up
• an earthquake

All the nonliving things that surround a living thing is the _____.

• environment

• community

• ecosystem

• population

Tags

NGSS.MS-LS2-3