*Question*
Q: The burning of what type of fuels is a major source of sulfur oxides and nitrogen oxides? Read this paragraph and choose the correct option from the provided answers: Choices: - biofuels - renewable - synthetic - fossil A:
**Answer**
fossil

*Question*
Q: What do you call the patterns and groups of stars in the sky that ancient people observed and made stories about? Read this paragraph and choose the correct option from the provided answers: The stars that make up a constellation appear close to each other from Earth. In reality, they may be very distant from one another. Constellations were important to people, like the Ancient Greeks. People who spent a lot of time outdoors at night, like shepherds, named the constellations. They told stories about them. Pictured below is one of the most easily recognized constellations ( Figure below ). The ancient Greeks thought this group of stars looked like a hunter. They named it Orion, after a great hunter in Greek mythology. Choices: - planets - meteors - asteroid fields - constellations A:
**Answer**
constellations

*Question*
Q: What is the primary gas produced from burning of wood? Read this paragraph and choose the correct option from the provided answers: When wood burns, it changes to ashes, carbon dioxide, water vapor, and other gases. You can see ashes in the wood fire pictured here. The gases are invisible. Choices: - liquid dioxide - Hydrogen Dioxide - toxic dioxide - carbon dioxide A:
**Answer**
carbon dioxide

*Question*
Q: Chordates are defined by a set of four characteristics that are shared by these animals at some point during their? Read this paragraph and choose the correct option from the provided answers: Chordates are defined by a set of four characteristics that are shared by these animals at some point during their development. In some chordates, all four traits are present in the adult animal and serve important functions. However, in many chordates, including humans, some traits are present only during the embryonic stage. After that, these traits may disappear. Choices: - death - response - birth - development A:
**Answer**
development