Kate gathered three boxes of the same size made of different materials glass clear plastic and aluminum painted black. she placed them on a window still in the sun for an hour and then measure the warmth of the air in each box. in this experiment the types of boxes materials are a(n)
a- independent variable
b- dependent variable
c- constant
d-control

Aflashlight battery is an example of a) potential energy b) kinetic energy c) thermal energy d) solar energy

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.

In the presence of oxygen, glycolysis is followed a. the krebs cycle b. lactic acid fermentation c. alcoholic fermentation d. photosynthesis