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  • When did the first plants appear on land?
    450 Million years ago
  • What gives plant leaves their green color?
    The chemical chlorophyll gives plants their green color.
  • Name three things that help birds to fly.
    Feathers, strong muscles and light bones help birds to fly.
  • Which word means "hard and firm"?
    solid
  • How long ago did Homo Sapiens evolve?
    Homo Sapiens evolved about 150 000 years ago.
  • How long have sharks lived in the oceans?
    Sharks have lived in the oceans for 450 million years.
  • What do we call the slow process of change whereby living things change to better suit the environment they live in?
    It's called evolution.
  • What happened in the seas 3.5 billion years ago?
    Life began in the seas 3.5 million years ago.
  • How long ago did the first continents take shape?
    The first continents took shape about 1.8 billion years ago.
  • What were the earliest plants that appeared on land?
    Mosses were the earliest plants to appear on land.
  • What do plants use photosynthesis to make?
    They use photosynthesis to make food.
  • Which word means "tiny living things"?
    Bacteria
  • What is this word "ænˌsɛstər"
    ancestor
  • How old is the oldest tree?
    The oldest tree is 9 550 years old.
  • How tall is the tallest tree?
    The tallest tree is 110m tall.
  • What is hibernation?
    Hibernation is when an animal sleeps for a long time in the winter.
  • Why did the dodo go extinct?
    People ate them because they weren't afraid of people.
  • Which animals do we share ancestors with?
    We share ancestors with gorillas and chimpanzees.
  • How many species of invertebrates do we already know?
    We know about 1.5 million species of invertebrates.