7-1-6 District Test Review

What is the First step in primary succession? _______________ lichens form lichens on wood lichens on rock

organic matter is being broken down Describe what is happening in this compost pile. _______________________________________ What is actually breaking down the material in the compost pile? ______________________ organic matter is being broken down micro-organisms

snake predator / mouse prey Bush  Mouse  Snake Using the food chain- Name a predator/ prey relationship ______________________________________ If the Mouse population increases, what will happen to the snake?____________________ If the snakes increased, what would happen to the mouse? ____________________________ snake eats the mouse snake predator / mouse prey increase decrease

Carbon Dioxide oxygen water Draw a diagram of the plant undergoing photosynthesis: Carbon Dioxide oxygen water

micro-organisms and decomposer break down the dead matter What do the arrows in the food web represent?______________________ Describes what is happening during decomposition and decay. What is involved in this process? ______________________________________________________________ flow of energy micro-organisms and decomposer break down the dead matter into new nutrient rich soil.

provides energy for photosynthesis What is the equation to the left describing? _____________________________ What uses this process? ______________________________________ Where does the radiant energy come from? ____________________________ Why is the radiant energy important? __________________________________ photosynthesis plants / producers sun / light energy provides energy for photosynthesis

chemical compounds that What is an organic compound? _______________________ What element must be present in order to be organic? ____ What is the connection between organic compounds and decomposers? ____________________________ Use the key to the left to draw an organic compound. Include at least 3 elements: chemical compounds that contain 1 or more carbon atoms sodium carbon hydrogen carbon carbon is one of the factors needed for decomposition oxygen 12 hydrogen 6 carbon 6 oxygen

predator / prey as prey increase predator increases increase What type of relationship exists between the rabbit and the fox? How can you tell? What happens to the rabbit population as the fox population decreases? predator / prey as prey increase predator increases increase

Draw a line and label each part of the model with the correct term. Population Organism Ecosystem Community Biosphere Which term includes that largest number of organisms? ____________ The Smallest? ___________________ biosphere organism

grass hawk sun producers primary consumer secondary consumer What organisms contain the most energy? _____ The least?________ Where do the producers receive energy from? ________ Which organisms provide energy for the primary consumers? ______________ for the secondary consumers? ________________ for the tertiary consumers? ________________ grass hawk sun producers primary consumer secondary consumer

mice, opossum, grasshopper, quail, bacteria What role do the bacteria play in the food web?____________________________________ Mice receive energy from _____________ Grasshoppers receive energy from ___________ Quail provide energy for the ____________ Grass provides energy for the _______________ How would the grasshoppers be affected if the opossum population increased? ____________________________________________________________ How would the mice be affected if the weasel population decreased? ____________________________________________________________ What organism has the biggest impact on all of the other organisms? ___________________ decomposers grass grass weasels / bacteria mice, opossum, grasshopper, quail, bacteria decrease increase producer / grass

frog's prey would increase Complete the chart using the frog’s microhabitat: Biotic Factors: Abiotic Factors: frog plants sand, rocks water, sunlight air List factors that are essential to the frog’s habitat: Predict what would happen if grasses were removed from this habitat: ____________________________________________________ What would happen if the grasses increased? food, shelter, water no shelter for frog no food for frog's prey frog's prey would increase

1. B 2. 3. A C producers consumers decomposers Match each Texas biome to it’s correct illustration. A. West Texas Desert B. Texas prairie C. Gulf of Mexico What organisms will inhabit each ecosystem? producers consumers decomposers

2. 1. Silver White Maple Pine 1a Leaves are needlelike go to 2 Use the dichotomous key to identify leaves 1 and 2 1a Leaves are needlelike go to 2 1b Leaves have flat blades go to 4 2a Needles attached singly go to 3 2b Needles attached in bunches White Pine 3a Needles on two sides of the stem Balsam Fir 3b Needles on all sides of the stem Red Spruce 4a Leaves are compound go to 5 4b Leaves are simple Silver Maple 5a 5-7 leaflets White Ash 5b 9 leaflets on each section Coffee Tree

producer= grass, acorn, duckweed Primary Consumer= grasshopper, rabbit duck Secondary Consumer= ducks, wolves Decomposers= bacteria