*Question*
Q: Brass and bronze are examples of what type of mixture composed of two or more elements, at least one of which is a metal? Read this paragraph and choose the correct option from the provided answers: An alloy is a mixture composed of two or more elements, at least one of which is a metal. You are probably familiar with some alloys such as brass and bronze. Brass is an alloy of copper and zinc. Bronze is an alloy of copper and tin. Alloys are commonly used in manufactured items because the properties of these metal mixtures are often superior to a pure metal. Bronze is harder than copper and more easily cast. Brass is very malleable and its acoustic properties make it useful for musical instruments. Choices: - halloid - compound - metalloid - alloy A:
**Answer**
alloy

*Question*
Q: What term refers to larger evolutionary changes that result in new species? Read this paragraph and choose the correct option from the provided answers: Macroevolution refers to larger evolutionary changes that result in new species. Choices: - Microevolution - Potential evolution - substantial evolution - macroevolution A:
**Answer**
macroevolution

*Question*
Q: What type of simple machine is a seesaw an example of? Read this paragraph and choose the correct option from the provided answers: Choices: - power - steam - single - lever A:
**Answer**
lever

*Question*
Q: What do you call the zone in a body of water where there is too little sunlight for photosynthesis? Read this paragraph and choose the correct option from the provided answers: Neurons are usually classified based on the role they play in the body. Two main types of neurons are sensory neurons and motor neurons. Choices: - semimetal zone - Dark Zone - observable zone - aphotic zone A:
**Answer**
aphotic zone