Astronomy
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Which two energy sources can help a star maintain its internal thermal pressure? | show 🗑
|
||||
| show | they would generate so much power that they would blow themselves apart.
🗑
|
||||
| As a solar mass protostar moves on to the main sequence, | show 🗑
|
||||
| When does a star become a main-sequence star? | show 🗑
|
||||
| show | Degeneracy pressure varies with the temperature of the star.
🗑
|
||||
| show | A star that is still in the process of forming
🗑
|
||||
| show | A cold, dense gas cloud
🗑
|
||||
| show | When the rate of hydrogen fusion becomes high enough to balance the rate at which the star radiates energy into space
🗑
|
||||
| show | mass they are formed with
🗑
|
||||
| A star's luminosity is the | show 🗑
|
||||
| According to the inverse square law of light, how will the apparent brightness of an object change if its distance to us triples? | show 🗑
|
||||
| If the distance between us and a star is doubled, with everything else remaining the same, its luminosity | show 🗑
|
||||
| show | apparent brightness = luminosity 4 (distance)2
🗑
|
||||
| You measure the parallax angle for a star to be 0.1 arcseconds. The distance to this star is | show 🗑
|
||||
| show | visual binary
🗑
|
||||
| show | surface temperature on the horizontal axis and luminosity on the vertical axis
🗑
|
||||
| show | by converting hydrogen to helium.
🗑
|
||||
| show | Calculate the star's luminosity if we know its distance, or calculate its distance if we know its luminosity.
🗑
|
||||
| If Star A is closer to us than Star B, then Star A's parallax angle is ________. | show 🗑
|
||||
| Which of the following terms is given to a pair of stars that we can determine are orbiting each other only by measuring their periodic Doppler shifts? | show 🗑
|
||||
| show | More massive stars live much shorter lives than less massive stars.
🗑
|
||||
| What is the common trait of all main sequence stars? | show 🗑
|
||||
| show | The remains of a star that ran out of fuel for nuclear fusion
🗑
|
||||
| All stars are born with the same basic composition, yet stars can look quite different from one another. Which two factors primarily determine the characteristics of a star? | show 🗑
|
||||
| show | Watts per square meter
🗑
|
||||
| Star A is identical to Star B, except that Star A is twice as far from us as Star B. Therefore: | show 🗑
|
||||
| show | orbital period and average orbital distance
🗑
|
||||
| Which of the following comparisons between low-mass stars and high-mass stars is true? | show 🗑
|
||||
| Astronomers can measure a star's mass in only certain cases. Which one of the following cases might allow astronomers to measure a star's mass? | show 🗑
|
||||
| show | Watts
🗑
|
||||
| show | A low-mass star
🗑
|
||||
| No stars are expected with masses greater than 300 times our Sun because | show 🗑
|
||||
| show | It will remain a brown dwarf forever.
🗑
|
||||
| show | Every object emits thermal radiation with a spectrum that depends on its temperature.
🗑
|
||||
| show | Hotter objects emit photons with a lower average energy.
🗑
|
||||
| show | Eclipsing binary
🗑
|
||||
| What is a molecular cloud? | show 🗑
|
||||
| show | The gas between the stars
🗑
|
||||
| show | all of them
🗑
|
||||
| show | the centers of disks around protostars.
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
lizhopper2
Popular Earth Science sets