How do electromagnets differ from regular magnets? a. they can be turned on and off b. their polarity can be reversed c. their strength can be changed d. all of the above

What in scientific term why the salty popcorn causes this thirst

What are some natural processes that represent physical and chemical changes?

Which of the following words best matches this definition: the process in which the best adapted organisms survive and pass on their traits, while those that are not well adapted do not survive to pass on their traits. question 3 options: acquired selection natural selection artificial selection organic selection