General Science- S2 Final Exam Chapter 18: How Chemicals Mix - Differentiate between a compound and a mixture. What do we call the part of a solution that substances dissolve into? What do we call the substances that dissolve? What is a saturated solution? Define concentration. Be able to identify which solutions are more concentrated than others. What do moles measure? Is a mole a small or a large number? Chapter 23: How Cells Work - Describe: diffusion, active transport, and passive transport. Differentiate between exocytosis and endocytosis. Name and describe the 4 phases of mitosis. Describe the enzyme-substrate complex. What is the molecule of cellular energy called? What happens during photosynthesis? Chapter 26: The Evolution of Life - How long do scientists hypothesize that life on Earth has existed? How long have modern humans existed? How do adaptations help organisms survive? Describe how structure relates to thermoregulation in cold vs. hot habitats. Does natural selection act on phenotype or genotype? Define a species. Describe natural selection vs. artificial selection. What was historically significant about the discovery of the fossil “Lucy”? Chapter 30: Ecosystems and Environment - Distinguish between a population, community, and an ecosystem. Name and describe the 3 types of symbiotic relationships found in nature. What is plankton? What is nekton? Be able to give an example of each. What 4 factors affect the size of a population? Define carrying capacity. Chapter 35: Weather - What is the Gulf Stream and what does it do? Which 2 gases make up the majority of Earth’s atmosphere? What are the 6 elements that comprise weather? Name and describe the 4 classifications of clouds described in this chapter. What are seasons caused by? What is the function of the greenhouse effect? What is the Coriolis effect?