Question

which of the following is exothermic?
burning wood
evaporation
melting ice
photosynthesis
question 7
which step of the water cycle is when water changes into vapor?
precipitation
evaporation
collection
condensation

Explanation:

Exothermic reactions release heat. Burning wood releases heat and light, so it is exothermic. Evaporation and melting ice are endothermic (absorb heat). Photosynthesis is an endothermic process as it requires energy from sunlight. In the water - cycle, evaporation is the step where water changes into vapor. Precipitation is water falling from clouds, collection is water gathering in bodies, and condensation is water vapor changing to liquid.

Answer:

Question 1: burning wood
Question 2: evaporation