- What is matter?
- What do you think might lie hidden in the darkness between stars?
- Name three things studied by scientists that your eye can't see directly.
- What is the difference between ordinary matter and dark matter?
- Explain why the force of gravity of the sun is greater than the force of gravity of a car.
- If dark matter can't be seen, how do we know that it might exist?
- What problem did scientists discover with the Big Bang theory?
- Explain the difference between dark matter and dark energy.
- What does astronomer Robert Kirshner mean when he says, "We're just now beginning to peel away the darkness"?
- If you were interested in learning more about dark matter or dark energy, where would you look? Name three resources for further inquiry.
- Why do scientists think the universe is expanding?
- Dark matter is still very mysterious stuff. Describe some of the candidates for what dark matter might be.
- Imagine that you are a bug living under a rock. Describe what the "universe" might look like to you.
- Do you think we could understand a universe outside our own? Why or why not?
- If you were an astronomer and wanted to study dark matter or dark energy, you might apply for a grant to help pay for the investigation. Write a persuasive paragraph explaining why such a study would be worthwhile.
Earth has a mass of about 6 million billion billion kilograms, and the sun has a mass of about 2,000 billion billion billion kilograms. Express each of these two numbers as a power of 10. The sun is how many times more massive than Earth?