A vertebrate is used to describe a being with a spine, like a human. This term describes a being without a spine.
Invertebrate
20
Nicotine is the addictive chemical in this plant.
Tobacco (cigarettes)
15
This word means the wearing away of land by water or wind.
Erosion
5
Waxing and Waning refer to this celestial body.
Moon
5
Enzymes in the body assist with this process.
Digestion
10
The constellation Aquila is named after this animal.
Eagle
15
Somnology is the study of this; make sure you get your 8 hours.
Sleep
10
This element's name originates from the Greek word for "yellowish green" or "greenish yellow," because of the color of the gas. It has a variety of uses, especially to disinfect water.
Chlorine
15
This element's name was possibly borrowed from the Akkadian "sarpu" or "sarapu" meaning "to refine" or "smelt." You can probably tell it has been refined if you get second place.
Silver
15
This element's name comes from the Greek word which means "hidden one." It also shares a name with the home planet of Superman.
Krypton
20
This element's name is an Anglo-Saxon translation of the Latin "plumbum" (like plumbing); it's also used to call what's inside a pencil (even though "graphite" would be more accurate)
Lead
15
This element was named after the Greek word for "the sun" or the mythological sun-god. Try not to breathe in too much from a balloon.
Helium
15
This element was named after the god of speed and messenger of the gods, as well as the planet closest to the Sun.
Mercury
15
This element's name is named for the Titans of Greek mythology
Titanium
15
This element's name comes from the Greek "neos," meaning "new"