7-1-6 District Test Review

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7-1-6 District Test Review
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What is the First step in primary succession?
_______________
lichens form
lichens on wood
lichens on rock
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• 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
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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
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• Draw a diagram of the plant undergoing
  photosynthesis

Carbon Dioxide
oxygen
water
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• 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.
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• 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
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• 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
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• 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
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• 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
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• 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
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• 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
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Complete the chart using the frogs microhabitat
Biotic Factors
Abiotic Factors
frog plants
sand, rocks water, sunlight air
List factors that are essential to the frogs
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
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1.
2.
3.
B
A
C

• Match each Texas biome to its correct
  illustration.
• A. West Texas Desert B. Texas prairie
• C. Gulf of Mexico
• What organisms will inhabit each ecosystem?

producers consumers decomposers
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2.
1.
Silver Maple
White Pine
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

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