The End

You have done it!! Congratulations! You are done with all of the assignments. (If you are not done with all of the assignments, please go back and finish them BEFORE you do this assignment.) You have nearly earned your .25 second quarter credit.


All that remains is a final course evaluation, a practice exam, and the final itself. Please complete the final course evaluation and the practice exam below. DO NOT DO THIS UNTIL YOU HAVE COMPLETED ALL OF THE PREVIOUS ASSIGNMENTS 2.1-2.13.


  1. What things (if any) did you like about the course?
  2. What things (if any) need to be changed?

Please complete the practice exam below. I will correct it and send you the results. This practice exam will be very helpful for you in taking the final.

Practice Exam

a. to find out what effect changing something will have

b. a correction for experimental errors

c. a preliminary trial of the methods

d. an opportunity for repetition of the experiment.

2. In a lake organisms die and decompose. Decomposition uses large amounts of oxygen that was dissolved in the lake’s water. The reduced level of oxygen in the lake would determine which of the following?

a. the number of trees living around the lake

b. the amount of rain water reaching the lake

c. the amount of clouds covering the lake

d. the kinds of water beetles living in the lake

In an investigation on salamander habitat sites, Juan’s hypothesis was “There will be more salamanders found under rocks than on the bottom of the pond in the water.” Juan lifted up all the rocks in a pond and found 13 salamanders. In the water, on the bottom of the pond, he found 33 salamanders.

  1. What variable was Juan testing?
a. The location salamanders prefer.

b. the relative water temperature of the pond.

c. Salamander eating preferences.

d. The relationship between light levels and rock types at the bottom of a pond.

a. The conclusion is invalid because it disagrees with the hypothesis.

b. The conclusion is invalid because salamanders prefer hiding under rocks.

c. The conclusion is valid because there were significantly more salamanders found on the pond bottom than found under rocks.

d. The conclusion is valid because amphibians prefer hidden areas.

e. The experiment is a failure because the hypothesis was wrong.

A farmer wants to know how to get more ears of corn from his land. You are going to conduct an experiment to help him. You decide to plant 10 corn seeds in 10 different pots. You fertilize 5 plants with a 100 ml of a 5% fertilizer solution once weekly and 5 plants with 100 ml of a 25% fertilizer solution once weekly.

a. How do you keep the deer from eating the corn?

b. How tall can a corn stalk grow?

c. How can you get more ears of corn?

d. How can you get more plants on his land?

a. If you water the plant more then you will get more corn.

b. If you fertilize the plant more than you will get more corn.

c. If you spread out the plants more you will get more corn.

d. If you give the plant more light you will get more corn.

a. In clouds

b. In oceans

c. In lakes

d. In wetlands

  1. Water is a bipolar molecule. What does this enable it to do?
a. it can solve any problem

b. it can dissolve many substances

c. it is found many places in the universe

d. it is part of most living things

a. temperature

b. salinity

c. dissolved oxygen content

d. molecular composition of water

a. Liquid water is more dense than ice.

b. Large pieces of ice float better than small ones.

c. Water is a polar molecule.

d. Water changes temperature when it changes from solid to liquid.

e. Ice at low latitudes is more dense than ice at higher latitudes.

a. density

b. solubility

c. color

d. surface tension

e. taste

a. It expands.

b. It contracts.

c. It becomes liquid.

d. It is no longer a polar molecule.

  1. What is upwelling?
a. when water, instead of oil, comes out of an oil well.

b. when currents bring nutrients from the ocean floor to the ocean’s surface

c. the exchange of currents at the mouth of a river.

d. currents created by undersea volcanoes

  1. What is the main cause of ocean currents?
a. tides

b. temperature differences

c. waves

d. wind

a. Expose crab eggs to saline solutions of varying temperatures and collect data on egg survival rates.

b. Expose crab eggs to salt water of varying salt levels and collect data on egg survival rates.

c. Expose fresh water trout eggs to saline of varying temperatures and collect data on egg survival rates.

d. Expose crab and fresh water trout eggs to fresh and salt water and collect data on egg survival rates.

16. Temperature changes in the surface waters of the Pacific Ocean that cause changes in weather patterns around the world are caused by a phenomenon called:

a. El Nino

b. Global warming

c. The Greenhouse Effect.

d. Ozone depletion.

17. Which of the following is the most direct effect of El Nino?

a. Increased amounts of skin cancer

b. The greenhouse effect

c. Ozone depletion

d. Changes in ocean currents

Match the following properties of water with their corresponding role in Earth’s Systems. Properties may be used more than once.

b. evaporation

d. expands when frozen

e. surface tension

f. universal solvent

g. capillary attraction

h. density

_____ 18. Aquatic plants can breathe under water because water carries dissolved carbon dioxide

_____ 19. The change of water from liquid to gas is what happens when plants lose water through their leaves

_____ 20. Water removes carbonates from rocks as it flows over and through them.

_____ 21. Water moves up small tubes.

______22 Some spiders can “walk” on the surface of water

_____ 23. Ice floats on the top of ponds.

______24. Wood floats on top of water

______25. Wax floats in water but not in alcohol.

______26. Salt dissolves in water but not it oil.

._____27. Liquid water quickly disappears from rock cavities in the Sahara desert.

______28. Water forms “piles up” when poured into a glass.

29. Where are the most nutrient-rich water that are best suited for fish to find food?

a. In deep sea trenches

b. Where the tides are at their lowest

c. In areas of upwelling

d. Where currents collide and form whirlpools

Once I have received the above information, I will correct your practice exam and will give you feedback. Then I will submit your name to the EHS proctor manager. At that point, you will be done with me. The proctor manager will contact you and will make arrangments for you to take the final. If you do not hear from the proctor manager in a timely manner, contact the EHS office. Once you are done with the final exam, the proctor manager will correct your exam and will assign your final grade.


Mrs. Hislop

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