The last Halley’s Comet visible on Earth appeared in 1986. When will it next appear?
Source 3 shows which two planets have over 50 moons
What variation gave some African elephant an advantage as the climate turned drier and hotter?
bigger ears to flap
What can scientists learn from the teeth of Paleomastodons and elephants today?
the size of the animal
what type of food they ate or eat
how well they took care of their teeth
how they care for their babies
A guitar string returns back to its original position when it is plucked. This type of pattern of returning movement is called
simple harmonic motion
normal return force