The earths orbit

is an ellipse
is a circle
causes day and night
goes around the moon

HEY MATE HERE YOUR ANSWER

The earth's orbit is a circle

The earth orbits is a circle

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.

On a roller coaster, the area with the highest potential energy is when it is on top of a hill/height.