*Question*
Oil is formed by layers of sediment pushing down on decomposing algae, and when the algae die they decompose. Given these facts, oil is formed when sediment layers push on what sort of algae among the following options: - coral - living - rich - healthy - dead - life - fungi - peat
**Answer**
dead

*Question*
Some parasites kill their host, but most do not, and humans are the unfortunate hosts of the deadly parasite. Given these facts, what parasites kill their human, but some do not among the following options: - friendly - deadly - animals - gentle - safe - harm them - goats - reproduce
**Answer**
deadly

*Question*
When the seasons change from the summer to the fall , the amount of daylight will decrease, and when it is summer in the Northern Hemisphere, the North Pole is tilted towards the Sun. Given these facts, how does the amount of daylight change in a location as the season there changes to fall among the following options: - uncontrolled - colors - reduce - increases - depends on the hemisphere - temperature - stays the same - decreases
**Answer**
decreases

*Question*
Producing thrust causes something to move, and airplanes create thrust using propellers, jet engines , or rockets . Given these facts, propellers are on some airplanes primarily to give among the following options: - stability - protection from bird strikes - speed - motion - engine cooling - energy - noise cancellation - power
**Answer**
motion