Earth Space Science flashcard

Front

What do astronomers learn from spectral lines?

Back

Astronomers learn information about the composition, temperature, density, and motion of stars.

Tags

NGSS.HS-ESS1-2

Front

What is Wein's Law used for?

Back

Wein's Law is used to determine the temperature of a blackbody based on the wavelength at which it emits its maximum radiation.

Front

What is the formula for Wein's Law?

Back

λmax = (3 x 10^6) / T, where λmax is the wavelength in nanometers and T is the temperature in Kelvin.

Tags

NGSS.HS-PS4-1

Front

What is absolute zero?

Back

Absolute zero is the theoretical temperature at which all atomic motion stops, defined as 0 degrees Kelvin.

Front

How is the chemical element name of an atom determined?

Back

The chemical element name is determined by the number of protons in the nucleus of the atom.

Front

What is the significance of protons in an atom?

Back

Protons determine the atomic number and thus the identity of the element.

Front

What happens to atomic motion at absolute zero?

Back

At absolute zero, all atomic motion theoretically stops.

Front

What is the relationship between temperature and wavelength in Wein's Law?

Back

As temperature increases, the wavelength of maximum emission decreases.

Front

What is a blackbody in the context of astronomy?

Back

A blackbody is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence.

Front

What is the Kelvin scale?

Back

The Kelvin scale is an absolute temperature scale used in science, where 0 K is absolute zero.