Year 10 Science · Unit 2 · Lesson 22

The Big Bang and Formation of the Elements

Challenge Worksheet

Name
Date
Class

Learning Goals

Go Deeper

Find the mistakes

A student wrote these five statements in their revision notes

  1. "All of the elements in the periodic table, including iron and gold, were created during the Big Bang."
  2. "Stars shine because they burn hydrogen the way a fire burns wood, a chemical reaction with oxygen."
  3. "A star can keep fusing heavier and heavier elements forever to release more and more energy."
  4. "The Big Bang was an explosion that threw matter outwards into the empty space that already surrounded it."
  5. "The cosmic microwave background is light coming from distant stars that we can see today."

1. Identify the error in statement 1 and write the correct account of which elements the Big Bang actually produced.

Challenge 1 mark

2. Correct statement 2. Explain what process actually powers a star and how it differs from burning.

Challenge 1 mark

3. Correct statement 3. Explain why fusion stops at iron, 5626Fe, and where heavier elements come from.

Challenge 1 mark

Go Deeper (continued)

4. Correct statement 4. Explain what the Big Bang really was, and why it is wrong to picture it as an explosion into pre-existing space.

Challenge 2 marks

5. Correct statement 5. Explain what the cosmic microwave background actually is and why it counts as evidence for the Big Bang.

Challenge 2 marks

Show What You Know

1. A gold ring contains atoms that are older than the Sun. In three or four sentences, trace the full journey of those gold atoms, from the Big Bang, through generations of stars, to the ring, naming the process that formed the gold itself.

Challenge 3 marks

Wrap Up

Of all the evidence for the Big Bang, which do you find most convincing, and why?

HSCScience · Year 10 Science · Unit 2 · Lesson 22 · Challenge Worksheet