Hr diagram worksheet pdf 2025

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The document is a worksheet focused on the Hertzsprung-Russell (HR) diagram, which illustrates the relationship between the surface temperature and luminosity of stars. It includes questions related to factors affecting star color and luminosity, surface temperatures of various stars, and classifications of different types of stars based on their characteristics.

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What are the 4 main categories on the H-R diagram?

By far the most prominent feature is the main sequence (grey), which runs from the upper left (hot, luminous stars) to the bottom right (cool, faint stars) of the diagram. The giant branch and supergiant stars lie above the main sequence, and white dwarfs are found below it.

What are the quadrants of the HR diagram?

The H-R diagram can also be roughly divided into quadrants. The top-left quadrant stars are hot and bright, whereas the top-right quadrant is cold and bright. The lower-left quadrant is small and hot, and the lower-right quadrant is larger and dimmer.

What is the main sequence H-R diagram?

The HertzsprungRussell diagram, or HR diagram, is a plot of stellar luminosity against surface temperature. Most stars lie on the main sequence, which extends diagonally across the HR diagram from high temperature and high luminosity to low temperature and low luminosity.

What are the four main groups on the HR diagram?

Main sequence stars, giants and supergiants, and white dwarfs all occupy specific branches on the diagram. These objects have an absolute magnitude and temperature that does not vary enough to change their spectral class.

How to create an H-R diagram?

A Simple H-R Diagram. Once you know the luminosity and temperature (or color) of a star, you can plot the star as a point on the H-R diagram. Plot the luminosity on the y-axis with brighter stars going toward the top.

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What four characteristics are given on the HR diagram?

The H-R diagram classifies stars based on luminosity, temperature, color, and spectral type. These properties help astronomers understand the characteristics and lifecycle of stars. The diagram is essential for studying stellar evolution over time.

Where do 90% of all stars fall on the H-R diagram?

Ninety percent of all stars on such a diagram fall along a narrow band called the main sequence. A minority of stars are found in the upper right; they are both cool (and hence red) and bright, and must be giants. Some stars fall in the lower left of the diagram; they are both hot and dim, and must be white dwarfs.

What does the HR diagram classify?

The HertzsprungRussell diagram (abbreviated as HR diagram, HR diagram or HRD) is a scatter plot of stars showing the relationship between the stars absolute magnitudes or luminosities and their stellar classifications or effective temperatures.

Hr diagram worksheet pdf 2025

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