Choose all the right answers.
the purpose of photosynthesis is:
to give animals energy
to change solar energy to chemical energy
to change foods to energy in plants
to make plant food from sunlight

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt