How stars make the elements
Grade 9 Science Worksheet
Circle the best answer.
Origin chain card with four blank boxes. Trace an oxygen atom in a glass of water back to its origin, by Bo's reading.
- Made in a star's core, spread into space, then gathered into Earth
- Made in Earth's oceans
- Made in the Big Bang, then stored on Earth ever since it formed
- Made by splitting iron
Read this first
Where elements were mainly made (NASA)
Element Atomic number Main origin hydrogen 1 Big Bang helium 2 Big Bang carbon 6 star cores oxygen 8 star cores iron 26 massive stars and their supernovas gold 79 neutron-star collisions Platinum, like gold, is among the heaviest elements. Where did it probably form, by Jun's reading (NASA)?
- In Earth's mantle
- In the Big Bang
- In neutron-star collisions
- In the core of Sun-like stars
Fusion ladder from hydrogen to iron, with a stop sign at iron. Why can fusion in a star's core not build elements past iron, by Kira's reading (NASA)?
- Fusing iron takes in energy instead of releasing it
- Stars contain no iron
- Iron splits into gold
- Iron fusion releases so much energy that the core blows apart
Fusion ladder with a stop sign at iron and two arrows leading off it. Where, then, do most elements heavier than iron form, by Luz's reading?
- In the Big Bang
- By fusing iron in quiet cores
- In supernovas and neutron-star collisions
- In the cores of Sun-like stars as they age
Fusion ladder with the Sun's last rung blank. About which element will the Sun's core fuse up to by the end of its life, by Milo's reading (NASA)?
- Uranium, formed in the Sun's core
- Gold
- Carbon, made from helium
- Iron
Carbon (6) fuses with helium (2). Which element forms, by Pia's reading?
- Oxygen, 8
- Nitrogen, 7
- Carbon, 6
- Neon, 10
Oxygen (8) fuses with helium (2). Which element forms, by Ren's reading?
- Neon, 10
- Magnesium, 12
- Oxygen, 8
- Fluorine, 9
Drawing of two small, dense stars merging, with glowing debris. In 2017, NASA telescopes caught light from two merging neutron stars about 130 million light-years away. What did that light reveal, by Tala's reading?
- Heavy elements forged in the debris
- Elements left from the Big Bang
- Hydrogen splitting into lighter atoms
- Elements made on Earth
The oldest stars hold far less iron than the Sun. Why, by Zee's reading?
- They formed before stars had made and spread much iron
- They fused their iron away
- Iron came from the Big Bang and has been used up
- Iron forms on planets, not in stars
A supernova remnant shows oxygen, silicon and iron in its spectrum. What does this show, by Ari's reading?
- Elements made in the star are spreading into space
- These elements were made by splitting
- These elements came from Earth
- These elements are left over from the Big Bang long ago
