Maximum Score:  9 Points

Question 1- pH data table.

3 points total

Point Criteria:

• Students receive points for the number of recorded pH's within the acceptable range of answers given in the data table.

  - Allow 3 points for 3 - 5 correct data entries

  - Allow 2 points for 2 correct data entries

  - Allow 1 point for 1 correct data entries

Question 2. Most and least acidic solutions	2 points total
Point Criteria:

• Allow 1 point for identifying the most acidic solution as sample A

  - Accept any student's response correctly based on his/her data.

• Allow 1 point for identifying the least acidic solution as sample C

  - Accept any student's response correctly based on his/her data.

Question 3. Sample most affected by acid rain and explanation	2 points total
Point Criteria:

• Allow 1 point for identifying sample A as the most affected

  - Accept any student's response correctly based on his/her data

• Allow 1 point for stating that the pH of A dropped or became more acidic than the others.

Question 4. Order organisms will die	2 points total
Point Criteria:

• Correct order is minnow, snail, salamander, bass, and perch

  - Allow partial credit (1 point) for 1 misplaced organism

  - Allow no credit for more than 1 misplaced organism

Student ID _______________________________	Acid Precipitation - Scoring Form
Male or Female (circle one)

Circle the student's score for each question. Add the points for each question and write the total score at the bottom of the scoring form.

	Total Score _______________________________
	Total possible score - 12 points