A student observes some sugar as it is heated and bums. The student concludes that a chemical reaction has occurred. Which of the following observations about the burning sugar
provides evidence of a chemical reaction?

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs

Which of the following options describes photosynthesis correctly? question 8 options: a plant uses carbon dioxide and water to make oxygen and nitrogen a plant breaks down sugar to make carbon dioxide. a plant uses sunlight, carbon dioxide, and water to make sugar and oxygen. a plant uses sunlight to break down sugars for digestion into water and oxygen.

Which promotes sustainability? o a. using more landfills o b. finding new sources of coal o c. increasing consumption o d. encouraging recycling programs