WorksheetsForming Elements Heavier Than Iron
Total questions: 2
Worksheet time: 10mins
1-9.
Answer the questions below after watching the video
Why have people historically valued gold so highly?
Because it is a good conductor of electricity.
Because it is easy to find.
Because it is incredibly rare.
Because it is very useful in daily life.
What is the primary use of most of the gold extracted throughout human history?
Electronics
Industrial applications
Currency
Jewelry
Which of the following elements is not mentioned as being valuable?
Gold
Silver
Platinum
Iron
Why are heavy elements scarce in the universe?
They are only created under rare conditions.
They are destroyed by stars.
They are used up quickly.
They are not formed naturally.
How often do the conditions to create heavy elements exist in a galaxy of 100 billion stars?
Less than a minute in every century
Once every decade
Once every millennium
Once every year
What is the minimum mass a star must have to create large amounts of heavy elements?
Five times the mass of our sun
Nine times the mass of our sun
Fifteen times the mass of our sun
Twenty times the mass of our sun
What happens to the core of a star in its final stages?
It falls in on itself with enormous speed.
It cools down slowly.
It becomes a black hole.
It expands rapidly.
What temperature is generated when the blast wave collides with the outer layers of a star?
100 billion degrees
100 million degrees
10 million degrees
1 billion degrees
What is the name of the most powerful explosion in the universe?
Supernova
Meganova
Hypernova
Nova
Select the correct order of the life stages of a high mass star.
protostar, main sequence, supergiant, neutron star OR black hole
neutron star, main sequence, red giant
protostar, main sequence, red giant, white dwarf
white dwarf, black dwarf, red giant, main sequence
