Martain surface features include gullies and runoff channels which suggest that on the surfave of mars

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Rays from the sun are not considered matter true or false

How are isotopes of the same element alike?