Fission, fusion and how radiation is used
Grade 10 Science Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
A neutron strikes uranium with mass number 235. It splits into barium with mass number 141, krypton with mass number 92, and some neutrons. How many neutrons, Ari?
A neutron strikes uranium with mass number 235. It splits into xenon with mass number 140, strontium with mass number 94, and some neutrons. How many neutrons, Bo?
A neutron strikes uranium with mass number 235. It splits into barium with mass number 144, krypton with mass number 89, and some neutrons. How many neutrons, Esme?
Read this first
Nuclear notation: a splitting and a joining (OpenStax §21.4)
process equation where it happens fission (splitting) uranium-235 + neutron → barium-141 + krypton-92 + 3 neutrons nuclear power plants fusion (joining) 4 hydrogen-1 → helium-4 + 2 positrons the Sun's core Using the card, which process powers the Sun, Kira?
- Burning coal
- Fission
- Fusion
Using the card, what does the Sun's fusion make from hydrogen, Luz?
- Helium
- Carbon dioxide
- Uranium
What do nuclear power plants use to make heat, Milo?
- Fission of uranium-235
- Fusion of hydrogen into helium
- Burning of coal
What is carbon-14 used for, Pia?
- Making electricity in power plants
- Dating once-living things
- Lighting the Sun
In a nuclear power plant, what does the heat from fission do, Ren?
- Turns into uranium again
- Boils water into steam for turbines
- Lights the bulbs in our homes directly
What controls the rate of fission in a reactor, Tala?
- Adding more coal to it
- Fans that blow on the core
- Control rods that absorb neutrons
Why does fission keep going as a chain reaction, Zee?
- Each fission releases neutrons
- Uranium pulls in heat from the steam
- Steam splits the nuclei