Answer the following question given this paragraph: rest after sticking together, conserving momentum. But the internal kinetic energy is zero after the collision. A collision in which the objects stick together is sometimes called a perfectly inelastic collision because it reduces internal kinetic energy more than does any other type of inelastic collision. In fact, such a collision reduces internal kinetic energy to the minimum it can have while still conserving momentum. Perfectly Inelastic Collision A collision in which the objects stick together is sometimes called "perfectly inelastic. Q: A perfectly inelastic collision reduces internal kinetic energy to the minimum it can have while still conserving what? Choices: - heat - energy - elements - momentum A:
momentum
Answer the following question given this paragraph: Hydrozoa includes nearly 3,500 species, most of which are marine. Most species in this class have both polyp and medusa forms in their life cycle. Many hydrozoans form colonies composed of branches of specialized polyps that share a gastrovascular cavity. Colonies may also be free-floating and contain both medusa and polyp individuals in the colony, as in the Portuguese Man O'War (Physalia) or By-the-Wind Sailor (Velella). Other species are solitary polyps or solitary medusae. The characteristic shared by all of these species is that their gonads are derived from epidermal tissue, whereas in all other cnidarians, they are derived from gastrodermal tissue (Figure 15.14ab). "The Hydrozoa Directory," Peter Schuchert, Museum Geneve, last updated November 2012, http://www. ville-ge. ch/mhng/hydrozoa/hydrozoadirectory. Q: Most hydrozoa have both polyp and what forms in their life cycle? Choices: - hydra - globular - polypoid - medusa A:
medusa
Q: Answer the following question given this paragraph: DNA consists of two long chains of nucleotides. Nitrogen bases on the two chains form hydrogen bonds with each other. Adenine always bonds with thymine, and guanine always bonds with cytosine. These bonds hold the two chains together and give DNA is characteristic double helix, or spiral, shape. You can see the shape of the DNA molecule in Figure below . Sugars and phosphate groups form the "backbone" of each chain of DNA. The bonded bases are called base pairs. RNA, in contrast to DNA, consists of just one chain of nucleotides. Determining the structure of DNA was a big scientific breakthrough. You can read the interesting story of its discovery at the URL below. Q: Dna consists of how many long chains of nucleotides? Choices: - three - zero - one - two A:
A: two
Question: Answer the following question given this paragraph: Scientists think of nature as a single system controlled by natural laws. Scientists strive to increase their understanding of the natural world by discovering natural laws. Laws of nature are expressed as scientific laws. A scientific law is a statement that describes what always happens under certain conditions in nature. Q: A statement that describes what always happens under certain conditions in nature is also known as what? Choices: - theory - hypothesis - scientific motion - scientific law A:
Answer: scientific law
*Question*
Answer the following question given this paragraph: Male reproductive structures include the penis, testes, and epididymis. Q: What is the third male reprodutive structure after the penis and testes? Choices: - clitoris - scrotum - anus - epididymis A:
**Answer**
epididymis
(Q).
Answer the following question given this paragraph: Q: Fossil evidence indicates that the ancestors of humans originated on which continent? Choices: - north america - australia - south america - africa A:
(A).
africa