The thermosphere is characterized by a drastic increase in temperature. What is the reason for this increase? A.
decrease in moisture
B.
absorption of ultraviolet rays from the Sun
C.
increase in air pressure
D.
entrapment of greenhouse gases

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

Drag each item into the proper state of matter category.

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.