The outer layer of the Earth is called the

lithosphere or crust?

If an object emits or reflects light

When sweat evaporates from your skin the temp of your skin decreases this is because

A change in color during a reaction is often a sign that a chemical change has occurred.

A bumblebee buzzes past you at 3 m/s. The frequency of the hum made by its wings is 152 Hz. Assume the speed of sound to be 342 m/s. What is the observed frequency of the hum as the bumblebee approaches you?

Which of the following materials is likely to be the best conductor? iron sulfur carbon tin

What are the starting materials for nuclear fission

Why is it possible to throw a 0.145 kg baseball much further than a 7 kg bowling ball?

What is the name of the force that opposes or slows down the motion of objects

If you jump into the air, are your legs pushing you away from the earth or pushing the earth away from you?

All of the following would be useful in trying to obtain procedural information to replicate an experiment previously published except for a lab journal used in the original experiment. a published scientific journal. a dictionary.