Q: Answer the following question given this paragraph: Mirrors are made from highly reflective metal that is applied to a curved or flat piece of glass. Converging mirrors can be used to focus light headlights, telescopes, satellite TV receivers, and solar cookers all rely on this principle. Like lenses, mirrors can create images. Q: What objects are made from highly reflective metal that is applied to a curved or flat piece of glass? A: | OPTIONS:
- frames
- vases
- machines
- mirrors
A: mirrors

Q: Answer the following question given this paragraph: Stereoisomers Molecules with the same connectivity but different arrangements of the atoms in space are called stereoisomers. There are two types of stereoisomers: geometric and optical. Geometric isomers differ in the relative position(s) of substituents in a rigid molecule. (For more information on stereoisomers, see Chapter 23 "The ", Section 23.4 "Coordination Compounds". ) Simple rotation about a CC bond in an alkene, for example, cannot occur because of the presence of the bond. The substituents are therefore rigidly locked into a particular spatial arrangement (part (a) in Figure 2.16 "Some Simple (a) Alkenes, (b) Alkynes, and (c) Cyclic Hydrocarbons"). Thus a carboncarbon multiple bond, or in some cases a ring, prevents one geometric isomer from being readily converted to the other. The members of an isomeric pair are identified as either cis or trans, and interconversion between the two forms requires breaking and reforming one or more bonds. Because their structural difference causes them to have different physical and chemical properties, cis and trans isomers are actually two distinct chemical compounds. Q: What is required for interconversion between the two forms of an isomeric pair? A: | OPTIONS:
- couple and reforming
- fixing and reforming
- turn and reforming
- breaking and reforming
A: breaking and reforming

Q: Answer the following question given this paragraph: Some minerals are valuable simply because they are beautiful. Jade has been used for thousands of years in China. Native Americans have been decorating items with turquoise since ancient times. Minerals like jade, turquoise, diamonds, and emeralds are gemstones. A gemstone is a material that is cut and polished to use in jewelry. Many gemstones, such as those shown in Figure below , are minerals. Q: Which mineral do native americans use to decorate items? A: | OPTIONS:
- Tanzanite
- Topaz
- Amethyst
- turquoise
A: turquoise

Q: Answer the following question given this paragraph: Total internal reflection occurs when light goes from a slow (high index of refraction) medium to a fast (low index of refraction) medium. With total internal reflection, light refracts so much it actually refracts back into the first medium. This is how fiber optic cables work: no light leaves the wire. Q: When does internal reflection occur? A: | OPTIONS:
- when light goes from a slow medium to another slow medium
- when light goes from a fast medium to a slow
- when light goes from a fast medium to another fast medium
- when light goes from a slow medium to a fast
A: when light goes from a slow medium to a fast