Q: Which is the lightest of the widely used structural metals? Choices: - Metal - calcium - potassium - magnesium A:
magnesium

Q: A cartilaginous joint where the bones are joined by fibrocartilage is called a what? Choices: - vesicles - mitosis - Testes - symphysis A:
symphysis

Q: Q: Tubeworms deep in the galapagos rift get their energy from what type of bacteria? Choices: - sprillia - filamentous - asexual - chemosynthetic A:
A: chemosynthetic

Question: Q: What type of organism, including sea stars and sand dollars, is named for their spiny skin? Choices: - mollusks - diatoms - chordates - echinoderms A:
Answer: echinoderms

*Question*
Q: What is the most diverse and abundant group of organisms on earth, numbering in the millions of trillions? Choices: - viruses - pests - pathogens - bacteria A:
**Answer**
bacteria

Q: Q: What do you get by multiplying volume by the density of water? Choices: - velocity of water - temperature of water - weight of water - mass of water A:
A: mass of water