Which is NOT an example of evidence that shows a chemical reaction occurred? change in color
change in temperature
change in shape
bubbles, fizzing

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)

You can decrease the resistance of a length of wire by

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions