submarines are unable to travel

there is a diverse population of sea creatures

life is unable to live within the ocean’s depths

there is a volcano constantly erupting

grief

amusement

concern

outrage

Tornadoes do not happen in other countries.

Tornadoes do not cause problems for other countries.

Tornadoes do not form in the United States often.

Tornadoes do not happen as often in other countries.

Careful birth records were not kept at this time.

John Smith fought in several wars

John Smith did not work hard as a slave.

The Virginia Company was the first to sail to America.

Polar bears like Alaska

Polar bears prefer getting food from people.

Polar bears are struggling to survive.

Polar bears like warm temperatures.

were entirely incorrect about the solar system.

knew everything about the solar system.

thought the Sun was a star

had some knowledge of the solar system

Chinese astronomers gave comets their name

Chinese astronomers had some accurate information.

Chinese astronomers were scared of ‘long-haired’ stars

Chinese astronomers disappeared with no warning

Tropical forests are used for a variety of human needs.

Tropical forests are more important than rain forests.

Tropical forests are located in one central area

Tropical forests are needed for construction.

coal is not a major factor in global warming

people in China, India, and other countries dislike coal

coal is the easiest source of fuel to live without

people use coal, despite its consequences