100 Points! Scientists used to believe that chemical reactions fueled the sun. Why did this lead them to believe that the sun was very young? Pls, answer in 3 sentences. I'll give brainliest.

17. a graduated standard used to evaluate student achievement is called a: a. rubric b. norm-referenced test c. criterion-referenced test d. multiple-choice question e. guessing penalty

Colton has trouble remembering information for his tests because he crams the night before. which would be the best study habit for colton to commit to? a. studying a little every day b. studying right before his tests c. studying in the evenings before bed d. studying only on saturdays

This table shows data collected by a weather station. if these trends continue, what weather can you predict for the region for the upcoming week? day 1 day 2 day 3 temperature, upper atmosphere (ºf) 45 44 43 temperature, surface (ºf) 61 59 55 air pressure (inches of mercury) 30.00 29.96 29.50 a. fair skies, warm weather b. a blizzard c. rain storms d. a few clouds, but very cold