Air pressure is less at higher elevations.  If Mona is climbing up a mountain and she reaches a high elevation, what will happen to the air pressure increase or decrease?
decrease

Better farming techniques and machines increased the food supply and the distribution of food.  As farming techniques are discovered, there are more or less people that starve and go hungry?
less

The glaciers on Earth are getting smaller and smaller as Earths temperature rises.  Eric noticed a glacier outside his boat shrinking over time. The Earth's temperature is likely decreasing or increasing?
increasing

Compared with a less powerful device, a more powerful device can either do more work in the same time or do the same work in less time.  When you use a 1 horsepower drill instead of a 2 horsepower drill it is more powerful or less powerful?
less powerful