Given the fact that:  A stronger acid produces a greater concentration of ions than a weaker acid.  Answer the question:   Milo is measuring acidity levels in his drink fridge. If his sprite is less acidic then his coke, which item has the greater concentration of ions coke or sprite?
coke

Given the fact that:  By using multiple stages, empty fuel containers could drop away. This reduced the mass of the rocket so that it could fly higher.  Answer the question:   What happens when you lighten a rocket goes higher or falls down?
goes higher

Given the fact that:  Plug-in hybrids run for a longer time on electricity and so are less polluting than regular hybrids.  Answer the question:   Kevin has a hybrid car and Steve has a large truck. Which car likely pollutes less hybrid or truck?
hybrid