Which of these layers is the Earth's outermost layer? A. the crust
B. the mantle
C. the inner core
D. the outer core

Which of these is least likely to be an adaption? a. a mouse digs a hole to hide from predators. b. a snake bites its prey to deliver it deadly venom. c.a jackrabbit has large ears that it release body heat. d.a parrot learns to say its owner's name.

Is water wet? and is fire on fire?

The standard deviation of a population is 3.2.what is the margin of error? enter your answer in the box.