Fact 1: The vanes rotating in an electric fan causes air to move. Fact 2: An electric fan makes 180 revolutions per minute. Given the two facts above, answer the question "What with the vanes rotating causes air here to move?" with the following options: - It reaches the dew point - heat to cooler objects - whale movement - it flows to a lower level - Earth's axis of rotation is tilted - vanes on submarins - Martian winds rotating. - 180 revolutions per minute.
180 revolutions per minute.

Fact 1: Using a gasoline engine requires burning gasoline. Fact 2: Oil and gasoline are fossil fuels. Given the two facts above, answer the question "Fossil fuels are burned in many what?" with the following options: - roads - Fuel cells - solids - fossilized animals - power - engines - energy - Electrical
engines

Q: Fact 1: Scraping oneself on a contaminated object may cause infection. Fact 2: An infection is an invasion of the body by bacteria. Given the two facts above, answer the question "Scraping oneself on an object that is what, may cause an invasion of the body by bacteria?" with the following options: - unknown - safe - threatened - harmful substances - Pollution - foreign - barrel-shaped - contaminated
A: contaminated

Question: Fact 1: Evolution occurs by a process called natural selection. Fact 2: Birth and death are natural processes. Given the two facts above, answer the question "What occurs through birth and death?" with the following options: - sleep - illness - anemia - tearing - Leptospirosis - nature - starvation - evolution
Answer: evolution

*Question*
Fact 1: Disease has a negative impact on an organism. Fact 2: Because it is a disease, it can be treated. Given the two facts above, answer the question "Negative impacts on organisms can be what?" with the following options: - Pollution - miscounted - dangerous - saved for later - treated - influenza - A virus - frozen
**Answer**
treated

*Question*
Fact 1: Population density is the average number of individuals per unit of area or volume. Fact 2: Density is the population divided by the area. Given the two facts above, answer the question "What is the average number of individuals per unit of area or volume?" with the following options: - population divided by class - population divided by area - solid, liquid, gas - biological diversity - competing for resources - population divided by income - population divided by wealth - Something that makes plants green
**Answer**
population divided by area