Rehan

1 State how old the universe is thought to be

The universe is thought to be approximately 14 billion years ago.

2. Identify the time when the young universe suddenly inflated.

The time that the universe suddenly inflated was within a fraction of a second when the universe began to expand fairly slowly

3. Matter and antimatter didn’t totally destroy each other after the big bang. Explain why it is lucky that this didn’t occur.

4. Identify what particles grouped into threes to form protons and neutrons.

Particles called quarks grouped together to form protons and neutrons.

5.  a) State the proportion of hydrogen in the universe.

     b) Explain why hydrogen is the most common element

     Hydrogen is the most common element because it is a substance which is found in almost everything in the universe.

6. Describe what is in a hydrogen nucleus

 In a hydrogen nucleus you can find 2 hydrogen atoms and one oxygen atom

7. Explain why the early universe was opaque.

The early universe was opaque because it contained energy in the form of radiation

8. Describe the effect on the ‘fog’ of the continuing expansion of the universe.

The continuing expansion of the universe caused more radiation.

9. Penzias and Wilson detected evidence for the Big Bang. Clarify the evidence they collected.

Penzias and Wilson produced an image of the universe when it was 300 000 years old. They collected this via the COBE satellite.

10. State what the acronym COBE stands for.

COBE stands for (Cosmic Background Explorer)

Trackback URI | Comments RSS