Write the scientific term:1. An interaction in which one organism kills another one for food ornutrients.(............................)2. The organism that kills and eats other animals. (............................)3. The organism that is eaten by other animals. (............................)Put (true) or (false):1. The relationship between sea snakes and great white sharks is calledpredation.( )2. The changes in population size occur when new members arrive or whenmembers leave.( )3. Too many predators in an area can increase the prey population. ( )4. Population size increases when the number of leaving members is morethan arriving members.( )Give a reason for each of the following:a) Predation is important for the population size.......................................................................................................................................................................................................................................b) The preys have different ways of adaptation.......................................................................................................................................................................................................................................

Write the scientific term: 1. A series of events in which one organism eats another and obtains energy and nutrients. (............................) 2. The main source of the energy on the Earth. (............................) 3. Network of interconnecting and overlapping food chains in an ecosystem. (............................) Choose the correct answer: 1. Grass in the food chain represents a .................. a.Consumer b. Producer c. Decomposer d. Scavenger 2. Bacteria in the food chain represent .................... a.Consumers b. Producers c. Decomposers d. Scavengers 3. If a locust in a food chain depends on the grass directly, it represents a ............... a.1st level consumer b. a & c c. Primary consumer d. Producer From the next living things try to form different food chains. (Grasshopper – snake – fox – frog – rabbit – grass)

Write the scientific term: 1. Any relationship in which two species live closely together. (............................) 2. It is a relationship in which one species benefits and the other species is neither helped nor harmed. (............................) 3. It is a relationship in which both species benefit. (............................) 4. It is a relationship that involves one organism living with, on, or inside another organism and harming it. (............................) Complete the following: 1. The organism that the parasite lives in or on is called ................... 2. During parasitism the organism that benefits is called .................. 3. There are ................... types of symbiotic relationships. 4. ..................., ......................., and ....................... are the types of symbiotic relationships. 5. Win-win relations are called .......................... Give a reason for each of the following: 1. The death of the host represents a loss for the parasite. ........................................................................................................................................ ........................................................................................................................................ 2. Commensalism is not very common in nature. ........................................................................................................................................ ........................................................................................................................................

This is a type of species relationship involving organisms that live in or on another organism and feed on it without immediately killing itSelect one:a.Mutualismb.Commensalismc.Inter Specific Competitiond.Predation

................... is a series of events in which one organism eats another and obtains energy and nutrients. Food chain Food web Energy pyramid All the previous

Write the scientific term: 1. It is a process through which living organism populations adapt and change to survive and produce more offspring. (............................) 2. The role of an organism in its habitat. (............................) 3. The struggle between organisms to survive as they use the same limited resources. (............................) Choose the correct answer: 1. Living things can adapt to their natural environment. a.True b. False 2. There are three major types of interactions. a.True b. False 3. Different kinds of adaptations are separate from each other to aid survival. a.True b. False What happens if: 1. Two species have the same kind of food. ................................................................................................................ ................................................................................................................ 2. Organisms cannot adapt successfully to changes in their environment. ................................................................................................................ ................................................................................................................