2006 Cosmic Times Open Notes Quiz

What two things are known about "dark energy"?

• It works against gravity and causes galaxies to move apart faster than expected.

• It attracts gravity and slows down galaxies.

• It has no effect on gravity and keeps galaxies stable.

• It only affects small galaxies.

In 2006, what were the three teams of scientists studying when they found evidence of dark energy?

• The effect of dark energy on light from the early universe.

• The effect of dark energy on black holes.

• The effect of dark energy on stars.

• The effect of dark energy on planets.

In 1998, what did two teams of astronomers discover about the rate of expansion of the Universe?

• The expansion of the universe is speeding up.

• The expansion of the universe is slowing down.

• The universe is not expanding.

• The universe is shrinking.

How does dark energy work to make the Universe expand faster?

• It stretches gravity wells, making them shallow.

• It deepens gravity wells, making them stronger.

• It has no effect on gravity wells.

• It reverses gravity wells.

What is the goal of the Joint Dark Energy Mission (JDEM)?

• To double-check and improve distance measurements to Type Ia supernovae.

• To explore black holes.

• To study the sun's energy.

• To map the Milky Way.

When the distance to Type Ia supernovae is more accurately measured, what will this provide clues to?

• How fast the universe has expanded throughout its history.

• The size of black holes.

• The age of the sun.

• The distance to the nearest galaxy.

What are the names of the three programs that are a part of JDEM and what part(s) of the electromagnetic radiation spectrum will each program study?

• SNAP – Optical and infrared light; ADEPT – Near-infrared; Destiny – Near-infrared.

• SNAP – Ultraviolet light; ADEPT – X-rays; Destiny – Gamma rays.

• SNAP – Radio waves; ADEPT – Microwaves; Destiny – Visible light.

• SNAP – Gamma rays; ADEPT – Ultraviolet light; Destiny – X-rays.

Tags

NGSS.HS-PS4-4

Based on the most recent evidence collected by astronomers, describe the composition of the Universe.

• 4% typical atoms (normal matter).

• 50% dark matter.

• 25% antimatter.

• 10% black holes.

Tags

NGSS.HS-ESS1-2

NGSS.HS-ESS1-3

Which statement is true?

• Dark matter does not interact with normal matter except through gravity.

• Dark matter is visible and interacts with light.

• Dark matter is a form of energy that powers stars.

What evidence do astronomers have for the existence of dark energy?

• Type Ia supernovae were moving away faster than expected.

• Slight changes in the CMB energy caused by the Integrated Sachs-Wolfe effect.

• The presence of black holes in the universe.

• The discovery of new galaxies.