Which of these describes an exothermic reaction? energy is released by the reaction energy is created in the reaction energy is absorbed by the reaction no energy is transferred by the reaction

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?