Based on your Birth of Stars Khan Academy assignment answer the following questions about stars: a) A huge cloud of what gas is squeezed together by gravity to ignite by fusion to form Helium and release the energy of a star. b) Which planet in our solar system is the biggest example of a huge collection of gas that does not meet the temperature and pressure threshold to fuse and ignite into a star?

Select the best definition for wavelength. the height of an oscillating electromagnetic wave the rate at which electromagnetic waves oscillate. the distance between two crests of an electromagnetic wave. the oscillations of electric and magnetic fields select the best definition for frequency. the oscillations of electric and magnetic fields. the height of an oscillating electromagnetic wave. the distance between two crests of an electromagnetic wave. the rate at which electromagnetic waves oscillate