2025 Physical Science Final Exam

What would complete the nuclear equation?

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Element Z has a half-life of 20 minutes. If you have a 200 g sample, how many grams of this sample would remain after 60 minutes?

• 200 g
• 100 g
• 50 g
• 25 g
• 0 g

Everything about radiation is bad.

• True
• False

Where would be the best place to hide to stay safe from gamma radiation?

• Under a blanket
• In a metal shed
• In the basement of a house
• In an underground bunker under concrete and lead.

Both a fusion reaction and a fission reaction

• take place at room temperature.
• use hydrogen as fuel.
• produce energy.
• cause chain reactions.

The type of radiation that can be stopped by a sheet of paper is

• gamma ray
• beta particle
• alpha particle
• all of these

The type of radiation that occurs when the protons & neutrons in a nucleus rearrange their positions and create great amounts of energy is

• Alpha particle
• Beta particle
• Gamma Ray
• Positron

All isotopes of every atom are radioactive.

• True
• False

Which of the following people was a famous scientist who helped discover radiation?

• Isaac Newton
• James Joule
• Marie Curie
• Albert Einsten

Radiation is released when the nucleus of an atom is

• too heavy
• unstable
• stable
• too light