Nuclear reactions

Which reaction splits a heavier atom in two?

• Fission

• Fusion

• Radioactive decay

Which nuclear reaction doesn't require reactants?

• Fusion

• Radioactive decay

• Fission

What reaction happens in the sun?

• Fission

• Fusion

What provides roughly half of the Earth's internal heat?

• Fusion

• Fission

• Radioactive decay

What stage is our sun currently in?

• Main sequence

• Red giant

• Blue giant

What is the reaction in the sun called?

• Proton-Proton Fusion

• Proton-Electron Fusion

In a nuclear reaction the mass of the reactants is _______ than the products.

• less

• more

• the same

Why do the products weigh less than the reactants?

• Because some mass has been converted to energy.

• Because some mass is 'wasted' to the surroundings.

Does nuclear fusion occur in the Earth's core?

• Yes

• No