DCP Review
1. Find a picture of an animal with an adaptation and explain how the adaptation is going to help that organism survive in it's environment.
<------ This bear's thick fur helps him survive the harsh weather. 2. List 2 ways humans have caused changes in populations of organisms. Pollution & Killing animals 3. How have humans negatively affected various populations? Humans have cut down trees and that effects the homes and shelter for some populations 4. What would happen to other organisms in a marine food web if human impact negatively affected one type of organism? Then the other organisms that feed off of them would lower and the organism the feed off of would over populate 5. How has over harvesting or over fishing negatively affected the aquatic ecosystem? changed the food change and population of other species 6. What is bacteria's role in the ecosystem? How do they obtain nutrients? Both land and water they help circle nutrients around 7. Describe a producer/consumer relationship in the food web below. Zooplankton and Salmon 8. Find a picture of a parasite/host relationship and explain which organism is the parasite and which one is the host. <--------- Turtle is host 9. Describe a predator/prey relationship in the food web below. Wild cat and lion 10. How many atoms are present in the molecule below? 24 atoms 11. How do you know by looking at a bohr model which elements are in the same group? by looking at the amount of outer electrons 12. What information is given when we have the chemical formula for a substance? expressing about proprtions with chemical element symbols 13. Describe evidence of a chemical reaction. Change of odor. Change of color (for example, silver to reddish-brown when iron rusts). Change in temperature or energy, such as the production (exothermic) or loss (endothermic) of heat. 14. Does the equation below follow the Law of Conservation of Mass? no, it's not because it's not balanced 15. How to valence electrons tell us how reactive an element is? based on the number of valence electrons, more VA= more Reactive 16. Describe examples of chemical and physical changes in the digestive system. Chemical: enzymes break down large food molecules by the process of hydrolysis Physical: solid liquid mush |