Earth Science and Salt Experiment Insights

The video discusses Earth's position as the third planet from the Sun, its surface area, and its age of 4.5 billion years. It highlights a NASA experiment by astronaut Don Pettit, who discovered how small particles clump together in zero gravity, revealing insights into the early formation of Earth's particles.

What is the estimated age of Earth according to scientists?

• 6.5 billion years

• 5.5 billion years

• 4.5 billion years

• 3.5 billion years

What was the main objective of Don Pettit's experiment in space?

• To create a new type of salt crystal

• To test the durability of plastic bags

• To measure the temperature of salt

• To observe the behavior of salt in zero gravity

What unexpected result did Pettit observe with the salt crystals?

• They evaporated

• They clumped together

• They changed color

• They dissolved in the bag

Which other material did Pettit use in his experiment besides salt?

• Sugar

• Flour

• Sand

• Pepper

What significant process related to Earth's formation did Pettit's experiment reveal?

• The formation of Earth's atmosphere

• The creation of Earth's oceans

• The binding of Earth's first particles

• The cooling of Earth's core