Which of the following statements is true? -the sun will eventually die, but it will not affect earth.
- the sun uses its own matter to create light and heat.
-the sun is a rare g2 star, which means it is extremely bright.
-the photosphere is only visible during a total solar eclipse.

If the new moon happens on january 15th, what shape will it be on february 6th?

Matter that emits no light at any wavelength is called

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.