One Strange Rock - "Alien"

When do scientists believe that life emerged on Earth?

• 4 billion years ago

• 5 billion years ago

• 6 billion years ago

• 7 billion years ago

How many different species of life are there on Earth?

• Over 6 million

• Over 7 million

• Over 8 million

• Over 9 million

The type of life that exists in different areas on Earth depends on what?

• If there is water or not

• The type of food there is available

• How much oxygen there is in the atmosphere

• Temmperature

Why do the Glow worms in the Waitomo Caves glow?

• To be able to see when they are hunting

• To scare away predators

• To renew their energy

• To attract bugs when they’re hungry

Life evolves to fit its _____________________________.

• size

• level

• food pyramid

• surroundings

How have camels adapted to live in the desert? (Choose all that you think apply)

• They need to drink a lot of water all the time

• Large hump/ mound of fat to store energy for months without eating

• Wide, flat teeth for chewing tough plants

• They need constant human attention to survive

What makes up the majority of life on Earth?

• Small single-celled organisms (bacteria)

• Humans

• Insects

• Fish

How has life adapted to live on sunken ships from WWII?

• Coral eats metal

• Microbes eat metal

• Fishes eat metal

• Sharks eat metal

What are some of the things that microbes will eat? (Choose all that apply)

• Metal

• Rocks

• Human flesh

• Plastic

What are some extreme places where microbes can live? (Choose all that apply)

• Mountain tops

• High up in the atmosphere

• Deserts

• Soil