Given a scientific passage and an answer, generate a question for the given answer.
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Question: Passage: Mixtures have different properties depending on the size of their particles. Three types of mixtures based on particle size are solutions, suspensions, and colloids, all of which are described in Table below . You can watch videos about the three types of mixtures at these URLs:. Answer: solutions, suspensions, colloids

Answer: What are the three types of mixtures?

Question: Passage: When electrons are removed from an atom, that process requires energy to pull the electron away from the nucleus. Addition of an electron releases energy from the process. Answer: energy

Answer: What is required when electrons are removed from an atom, and released from the process when an electron is added?

Question: Passage: Halide minerals are salts. They form when salt water evaporates. This mineral class includes more than just table salt. Halide minerals may contain the elements fluorine, chlorine, bromine, or iodine. Some halide minerals combine with metal elements. Common table salt is a halide mineral that contains the elements chlorine and sodium. Fluorite is a type of halide that contains fluorine and calcium. Fluorite can be found in many colors. If you shine an ultraviolet light on fluorite, it will glow!. Answer: halide

Answer:
What type of minerals form when salt water evaporates?