Question

explaining dark matter and dark energy
which statements explain current theories about dark energy and dark matter? check all that apply.
□ space that appears empty actually contains dark energy and dark matter.
□ dark matter does not emit electromagnetic radiation.
□ scientists believe dark energy will cause the universe to collapse inward to a single point.
□ scientists theorize that dark energy is causing the expansion of the universe to accelerate.
□ dark matter includes all of the dust, ice, and debris that scientists observe in black holes.

Explanation:

• Empty space contains dark energy/matter: Current cosmology holds that most of the universe is made up of dark matter and dark energy, which fill seemingly empty space.
• Dark matter emits no electromagnetic radiation: A key property of dark matter is that it does not interact via electromagnetic forces, so it does not emit, absorb, or reflect light/radiation.
• Dark energy accelerates cosmic expansion: Observations confirm that the universe's expansion is accelerating, which is attributed to dark energy.
• The collapse claim is incorrect: Dark energy drives expansion, not a collapse; a "Big Crunch" would relate to high gravitational pull, not dark energy.
• Dark matter is not observed debris: Dark matter is a hypothetical, unseen substance, not ordinary observable matter like dust or black hole debris.

Answer:

• Space that appears empty actually contains dark energy and dark matter.
• Dark matter does not emit electromagnetic radiation.
• Scientists theorize that dark energy is causing the expansion of the universe to accelerate.