Font size
WorksheetsUnderstanding the Composition of Stars
Total questions: 3
Worksheet time: 11mins
1-10.
Answer the questions below after watching the video
What property of chemical elements allows us to understand what the universe is made of?
Their temperature
Their density
The the unique set of colours they reflect from the stars.
Their mass
Their unique set of colours when heated.
Which element burns with a red color?
Potassium
Sodium
Strontium
Copper
What do the black lines in the sun's spectrum represent?
Emission lines
Absorption lines
Transmission lines
Reflection lines
What can we determine by looking at the black lines in the sun's light?
The constituent elements of the sun
The distance of the sun from Earth
The temperature of the sun
The age of the sun
What percentage of the sun is made up of hydrogen?
2%
28%
70%
50%
Which star has about the same heavy element abundance as our sun but less carbon and more nitrogen?
Vega
Polaris
Sirius
Proxima Centauri
Which star contains three times as much iron as the sun?
Sirius
Vega
Polaris
Proxima Centauri
Which star is rich in magnesium?
Proxima Centauri
Sirius
Vega
Polaris
What is the second brightest star in the Northern sky?
Vega
Proxima Centauri
Sirius
Polaris
How many elements are found both on Earth and across space?
100
92
70
28
What is the second most common element found in the sun?
Carbon
Oxygen
Helium
Magnesium
A cool gas of a particular element...
...absorbs the complementary colours to those emitted by a hot gas of that same element.
...absorbs all colours of light emitted by a hot gas of any element.
...absorbs only certain colours emitted by a hot gas of that same element.
...absorbs the same colours emitted by a hot gas of that same element.
