Lesson 1.4 - Vanishing nature

How do scientist determine that a species has become extinct? Write in 100 words

Give two examples of causes of mass extinction in earth's history in 100 words

Why might a plant or an animal be removed from the list of extinct organisms? Write in 50 words.

What method do scientists use to trace plant and animal extinctions through earth's history? Write in 50 words.

What is extinct?

• A species that is endangered.
• A species that is thriving.
• A species that no longer exists.
• A species that has migrated to a new habitat.

What is salinity?

What is invasive species? Write in 50 words.