Problem: John likes to ride on hot air balloon. Last month he rode on a balloon with his friend Keith. First they were at the ground-level. They called it camp A. Then they rose to the height of three miles. They called it camp B. Eventually, they reached six miles above ground. They called it camp C. Would there be less or more oxygen in camp B than in camp C?

A: more

Problem: A biologist was in Australia making observations about the local species when he identified two distinct groups of butterflies. He found that one group of butterflies, group A, blended in with the dark oak trees that were common in the area. Butterflies in the other group, group B, however did not blend in as well and could easily be spotted by predators whenever they landed on the oak trees. Will the traits belonging to the group B butterflies become more common or less common over time?

A: less common

Problem: Bess and Dee were two entomologists. they were studying ants. Dee liked to learn more about leaf cutter ants, while Bess learned all she could about all other ants. Which person read more about ants which build fungal gardens?

A: Dee

Problem: David was trying to see how steam engines work. For that, he conducted two tests, test A and test B. In test A, he used low temperature. On the other hand, in test B, he used high temperature. David started thinking about how he could use the results of his tests in everyday life. Would test A see less or more forceful collisions of molecules than test B?

A:
less