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Hydrophilic molecules exhibit attraction to water as well as ions and polar molecules 3.
Hydrophobic molecules exhibit no attraction to water do not dissolve C. Water has a high specific heat c. It takes more energy to heat water than most substances 2. Heat of vaporization is the amount of heat required to vaporize a substance b. Most liquids become more dense when they are solid 2.
A unique property of ice is that it is less dense than liquid water E. Basic solutions contain more hydroxide ions OH than hydrogen ions H 4. Water has a pH of 7 equal amounts of H and OH 5. Introduction This activity is a basic introduction to the concept of chemical bonding.
This is a short, in-class exercise that can follow an introductory discussion of atomic structure and bonding. Students will take the number of their birth month as their atomic number. Given this information, they will be able to determine the configuration of electrons. They will then be able to determine how this atom will interact with other atoms, if at all. Students will form groups with other students to form ions or molecules and will present their bond formation to the class.
Chapter Concepts Addressed 1. Students learn about atomic structure and electron configurations 2. Students apply their knowledge of electron configuration to atomic bonding 3. Students interact with classmates to form ionic or covalent bonds Materials Needed No specific materials are needed. D evolve in response to the environment.
B Sweating is important for eliminating impurities from the body. C Sweating is the only way the body eliminates excess water. D Sweating is an important mechanism for maintaining the correct body temperature.
B evolution. C mutation.
D responsiveness. E DNA. This is an 43 example of a living thing A reproducing. B evolving. C responding to stimuli. D maintaining precise internal conditions. This is an example of how living things A detect and respond to stimuli. B reproduce. C maintain precise internal conditions. D acquire nutrients. E grow. B being composed of prokaryotic cells.
C the potential to grow and reproduce.
D ingestion of organic matter to acquire nutrients. B Food provides at least half of the water required by heterotrophs. C Food is an alternative source of energy for heterotrophs when sunlight is unavailable.
D Heterotrophs cannot photosynthesize without the chemicals provided by food. B their ability to move. C how they obtain energy. D how they reproduce. Choose the item in column 2 that best matches each item in column 1.
For the following question s , choose the characteristic of a living organism that best corresponds to each statement. Selections may be used once, more than once, or not at all. B Response to stimuli 49 A puppy is born weighing 5 pounds 49 and eventually becomes a pound golden retriever.
B Evolution 52 A bacterium divides into two bacteria 52 that are identical to, but smaller than, C Response to stimuli the original bacterium. Only those giraffes with longer necks survived by eating the leaves high up on the trees, and they were able to reproduce and pass those long-neck genes on to the next generation. B molecules only. C atoms only. D atoms and molecules. E organs only. B is considerably larger. C possesses membrane-bound organelles. D lacks DNA.
E is structurally more complex. B All members of Bacteria are single-celled and all members of Eukarya are multicellular.
C All members of Bacteria are prokaryotic cells and all members of Eukarya are eukaryotic cells. D All members of Bacteria acquire nutrients via ingestion and all members of Eukarya acquire nutrients by photosynthesis. B member of the Kingdom Plantae.
C eukaryotic cell. D prokaryotic cell. Write 'T' if the statement is true and 'F' if the statement is false. Write the word or phrase that best completes each statement or answers the question. Design a simple experiment based on this observation, and include a hypothesis statement and your actual experimental design for the study.
A young scientist brings you a sample from a previously unexplored site. She asks you to look at the sample and determine whether it indeed contains microscopic, living organisms. As you begin your investigations, you must first decide what characteristics distinguish life from nonlife. How would you differentiate a living organism from nonliving matter including viruses and prions? B prokaryotes. C fungi. D animals. E protists. The damage was being caused by an unknown microorganism that could not be cultured in the lab.
Doctors observed that antibiotics, which kill only prokaryotes, were ineffective. They suspected that the microbe was a fungus, so they tried the drug Amphotericin, which targets the ergosterols in fungal cells. Because animal cells contain cholesterols, not ergosterols, they are unaffected by the drug. Shortly after receiving Amphotericin, the patient improved, her infection ceased, and she was released from the hospital.
In this scenario, what was the hypothesis? A A microbe that has cholesterol is causing the infection. B Antibiotics will not kill the microbe because it is a fungal species.
C The infection will spread rapidly. D If the infection is caused by an animal, then Amphotericin will cure the patient. E Why didn't the antibiotics kill the microbe that caused the infection? Embedded several inches within the rocky structure, a microscopic cluster of dormant, spore-like structures is found. The scientists culture some of this material in a standard microbiological nutrient broth, and they are surprised to find many single-celled "organisms" moving around, growing, and reproducing in the broth.
The "organisms" behave the same in both daylight and dark conditions, do not require oxygen, and thrive under a wide range of temperatures and pH levels.
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Examples come from a range of hydrologic, atmospheric, and geophysical problems. The emphasis is on simple examples and calculations that add to understanding. The book provides a sense for the meaning of mathematical expressions, a physical feel for their relations to processes, and confidence in working with mathematical solutions.
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