Which of the following is NOT an electromagnetic wave? A visible light
O
B. sound
o
C. X-ray
O
D. gamma ray

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.

Based on the number of offspring they produce at one time organisms are classified into two categories many offspring at once and a few at a time sort the carry sticks based on the category they describe