A line. You can even check a map
Answer:
Temperature is a common type of controlled variable. If a temperature is held constant during an experiment, it is controlled. Other examples of controlled variables could be an amount of light, using the same type of glassware, constant humidity, or duration of an experiment.
Explanation:
Number one: True Number 2: False because hot stars apear as blue-white and cool stars apear as red
Elements in the same group tend to have very similar properties (D). This is due to the number of valence electrons each group has.
