Q: Answer the following question given this paragraph: Most archaea are chemotrophs and derive their energy and nutrients from breaking down molecules in their environment. A few species of archaea are photosynthetic and capture the energy of sunlight. Unlike bacteria, which can be parasites and are known to cause a variety of diseases, there are no known archaea that act as parasites. Some archaea do live within other organisms. But these archea form mutualistic relationships with their host, where both the archaea and the host benefit. In other words, they assist the host in some way, for example by helping to digest food. Q: Are the majority of archaea chemotrophs or photosynthetic? Choices: - photosynthetics - neither - autotrophs - chemotrophs A:
A: chemotrophs

Q: Answer the following question given this paragraph: Q: Ice floats because it is less what than liquid water? Choices: - heavy - gaseous - warm - dense A:
A: dense

Q: Answer the following question given this paragraph: An element is a pure substance that cannot be broken down into different types of substances. There are almost 120 known elements ( Figure below ), each with its own personality. The chemical and physical properties of one element differ from any other. Elements are arranged according to their properties in the Periodic Table . Q: What do you call a pure substance that cannot be broken down into different types of substances? Choices: - molecule - sample - compound - element A:
A: element

Q: Answer the following question given this paragraph: Q: What are compounds formed by ionic bonds called? Choices: - nuclear compounds - layered compounds - mixed compounds - ionic compounds (salts) A:
A: ionic compounds (salts)