Help me please easy 7th grade science?

1. The imaginary line drawn from the north geographic pole to the south geographic pole is called Earth's _____. (1 point) * rotation * hemisphere * equator * axis 2. _____ causes Earth to have day and night. (1 point) * Revolution * Gravity * Rotation * Equinox 3. The longest day of the year in the northern hemisphere is the _____. (1 point) * summer solstice * spring equinox * winter solstice * fall equinox