Is There Life Out There?

Europa is a little smaller than which of the following?

• Earth's moon

• Mars

• Venus

• Saturn

Fill in the blank: Scientists believe that life on Europa might be under the ____.

• water

• sand

• ice

• rocks

What do the newly discovered creatures not depend on for food and energy?

• The Sun

• Plants

• Water

• Both A and B

Fill in the blank: Scientists thought all food chains led back to plants and ____.

• animals

• photosynthesis

• water

• sunlight

What do animals living around hydrothermal vents eat?

• Plants

• Bacteria

• Fish

• Algae

Europa is considered a place where life might exist because it has ________.

• Sunlight

• Oxygen from photosynthesis

• Oceans

• Warm temperatures.

The ice on Europa's surface covers what looks like ________.

• Moving liquid water

• Sand dunes

• Rocky mountains

• Forests

What do scientists not yet know about Europa's oceans?

• If they have fish

• If they have hydrothermal vents

• If they have plants

• If they have rocks.

Reread the last paragraph in the passage. Why did the author include information about Lake Vostok in Antarctica?

• To compare it with other lakes

• To highlight its uniqueness

• To discuss its climate

• To describe its wildlife.

Fill in the blank: The diagram _______ helps you better understand hydrothermal vents.

• visually

• verbally

• musically

• mathematically