Which statement about moons is true?

a: the moon is earth's only natural satellite.

b: the moon produces its own light.

c: all other planets have just one moon.

d: the moon is larger than earth.

Which describes an image that can be produced by a concave lens? the image is real and smaller than the object. the image is virtual and larger than the object. the image is virtual and smaller than the object. the image is real and larger than the object.

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults

James joule carefully measured the difference in temperature of the water at the top and bottom of a waterfall. why did he expect a difference