Question

According to measurements made by the Wilkinson Microwave Anisotropy Probe (WMAP), which material is by far the most plentiful in the universe?
baryonic matter
• dark matter
• neutrinos
• dark energy
Which types of baryonic matter are most abundant in the universe? Select the two correct answers.
• hydrogen
• oxygen
• helium
• carbon
• nitrogen

Answer 1

According to measurements made by the Wilkinson Microwave Anisotropy Probe (WMAP), the material that is by far the most plentiful in the universe is **dark energy**.

For the second part of your question regarding the types of baryonic matter that are most abundant in the universe, the two correct answers are:
- **hydrogen**
- **helium**

Hydrogen is the most abundant element, followed by helium.