What can cause long-term environmental changes by blowing dust and gases into the sky ?

Using complete sentences, explain how to predict the products and balance the reaction between sulfuric acid and potassium hydroxide.

Evaluate this exponential expression,8. (2 + 3)2 – 42

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.