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Animals
Animals A-Z
NH Animals
The Animal Kingdom
Shows
NatureWorks
Wildlife Journal Junior
Education
Natural Science Concepts
Adaptation
Animal Diversity
Biomes
Habitat
Interdependence
Man and the Natural World
Social Studies Connection
Teacher’s Guides
Take Action
Support NH PBS
Leave No Trace
Creating a Butterfly Garden
Build a Bird Feeding Station
Observing Wildlife
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Life at Risk
Quiz 16 - Life at Risk
1. Species are species that no longer exist on Earth are
endangered
threatened
extinct
2. Changes in an environment
are always natural
are caused by humans
can be natural or can be caused by humans
3. Some scientists think dinosaurs became extinct
after a meteorite hit the Earth
because of human activity
because they evolved into birds
4. Scientists estimate that
over 1/5 of the species that once lived on Earth are now extinct
over 2/3 of the species that once lived on Earth are now extinct
over 1/2 of the species that once lived on Earth are now extinct
5. The West Indian manatee is an endangered species due to
a combination of natural and man-made causes
disease
an increase in water temperatures
