Doud
Question 3
1 pts
Which of the following is NOT a physical property commonly used by scientist to
classify stars?
O Apparent brightness
Temperature
Absolute brightness
O State of matter

State of matter

Explanation:

State of matter is not a physical property used by scientists to classify stars because all stars are made up of gases.

The gases can become furnished with excessive heat and they become ionized to plasma state of matter. All stars are gas giants and with some plasma.

The temperature of a star is a good diagonistic tool. Hot stars are blue .The apparent brightness of a star is the rate at which the energy radiated from the star reaches an observer. Absolute brightness is the true brightness of a star.

The correct answer is: state of matter.

Explanation:

When classifying stars, scientists use different criteria,  as, for example: color, temperature, size, composition, and brightness. On the other hand, state of matter is not a physical property which is taken into account by scientist to classify stars, as it is not one of the star's characteristics.

The Letter "R"

Explanation:

"R" is in the middle of March and April but it can't be seen in either of the months.