Read the passage. Scientists often need a catalyst to start a chemical reaction. They need to apply heat, acids, or other materials to jump-start the experiment.

Which phrase is the best definition of catalyst?

something hot
something acidic
something that triggers
something that is scientific

Which of the following equations represents the right chemical process that occurs i. photosynthesis

If one thinks illegal immigrants should become american citizens, should they become american citizens automatically or should there be a waiting period? if there should be a waiting period, explain why.

In presidential elections if no candidate receives a majority of the election votes, a. the winner is decided by the house of representative’s. b. the current president remains in office for four more years. c. the winner is decided by the senate. d. a runoff election is held in december between the two candidates who received the most votes in the general election.