What are the common uses for different handshapes in American Sign Language (ASL) and what do they classify?

Here are the answers to the quiz on Introductory Sign Language:

1. The "ILY hand" is most commonly used for objects that are in air, such as airplanes.
2. The "flat hand" is commonly used to classify animals with long ears.
3. The "AND hand" can be used to represent objects that come in groups.
4. The "clawed hand" is used to describe flat surfaces or objects with right angles.
5. The "bent hand" is used to describe flat surfaces, weather patterns, traffic, and curves.
6. The "open hand" can be used to classify objects that have a flat surface.
7. The curved hand