Which of these statements is true of both endothermic and exothermic reactions A.
They create thermal energy during the reaction.
B.
They require energy to continue.
C.
They require energy to get started.
D.
They absorb energy from the environment

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.