1. 7-1-6 District Test Review

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

3. 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

4. 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

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

6. 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.

7. 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

8. 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

9. 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

10. 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

11. 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

12. 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

13. 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

14. 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

15. 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

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