Men on board a ship put on protective goggles to watch an hydrogen bomb test; a huge mushroom cloud forms.

The video describes a massive explosion that vaporizes an island, creating a giant fireball and a mushroom cloud filled with radioactive dust. This cloud rises 25 miles into the sky. Another bomb test results in radioactive fallout affecting Japan.

What is the extent of the fireball created by the nuclear explosion?

• Four miles

• Three miles

• Two miles

• One mile

What happens to the island as a result of the nuclear explosion?

• It is flooded

• It is split in half

• It is vaporized

• It is covered in ash

How high does the mushroom cloud rise into the sky?

• 25 miles

• 20 miles

• 30 miles

• 15 miles

What fills the mushroom cloud after the explosion?

• Water vapor

• Radioactive dust

• Smoke

• Ash

Which country was affected by the radioactive fallout from another bomb test?

• China

• South Korea

• Japan

• Philippines