Ngā Whāinga Ako

• Get an overview for the history of the Earth

Mahi Tuatahi

1. Draw a vertical line in the center of your page and label it from top to bottom with: 5 billion years ago, 4 billion, 3 billion, 2 billion, 1 billion and now.
2. Label one side Scientists Estimation and the other My Estimation.

Guess the dates of the following on your line:

• When the Earth was first formed
• When life first began
• When plants first appeared
• When dinosaurs first appeared
• When dinosaurs became extinct
• When early humans first appeared
• When humans started to record things

• When the Earth was first formed: 4.5 billion years ago
• When life first began: 3.5 billion years ago
• When plants first appeared: 470 million years ago
• When dinosaurs first appeared: 230 million years ago
• When dinosaurs became extinct: 65 million years ago
• When early humans first appeared: 200,000 years ago
• When humans started to record things: 5,000 years ago

Whakamātau: Toilet Paper Timeline

Research / Mahi Kāinga

• Find out how scientists have aged the Earth.
• What evidence have they used for their estimation.
• Bring your research to class tomorrow!