Q: What important and unusual physical property (for birds) do ostriches and penguins share? Choices: - waterproofness - webbed feet - bonelessness - flightlessness A:
flightlessness

Q: What is a large space that helps the organism digest & move nutrients around the cnidarian body? Choices: - thorax - abdominal wall - vacuole - gastrovascular cavity A:
gastrovascular cavity

Q: Q: What is the force that causes objects to fall down to the ground? Choices: - velocity - pull - motion - gravity A:
A: gravity

Question: Q: What is an interesting example of a molecule with two central atoms, which are both c atoms? Choices: - chloride - water - sulfur - acetylene A:
Answer: acetylene

*Question*
Q: What forms when a glacier scrapes a large hole in the ground? Choices: - frozen lake - drift lake - melting lake - glacial lake A:
**Answer**
glacial lake

(Question)
Q: What kind of bonding between alcohol molecules means that more energy is required to convert the liquid to vapor, and boiling points are therefore high? Choices: - weaker carbon bonding - stronger mineral bonding - stronger diffusion bonding - stronger hydrogen bonding A:
(Answer)
stronger hydrogen bonding