Before Strategy/Engage: 25 minutes
1. The teacher should pose the question, "How are the water and rock cycles related on Earth?" Allow several students to share and discuss their answers. Through careful questioning and discussion, the teacher should lead students to the conclusion that water on Earth's surface can change the rocks on Earth's surface in several ways.
Note: The first slide of the PowerPoint will summarize the ideal answer to this question.
2. The teacher should give each student a copy of the Mechanical and Chemical Impacts of Water on Earth's Materials Jot Chart (see attachments).
3. The teacher can project the Mechanical and Chemical Impacts of Water on Earth's Materials PowerPoint and allow students to take notes on their jot chart (see attachments). If student technological devices are available, the teacher can share the presentation with students via Google Classroom, Edmodo, etc. to allow students to view the presentation on their device and take notes individually or with partners.
4. As students view the PowerPoint presentation, they will take notes on their jot chart, which will include the cause, effect, and a sketch of each type of impact. The teacher should explain to students that these notes will be used during the geologic field study.
Example Entry for Erosion:
-Cause: Running water (such as from a stream or river)
-Effect: Wearing away of rock and breaking it into smaller pieces, abrasion can also occur.
-Sketch: Students could sketch a stream flowing over a rock stream bed. Students can color their sketch if materials are available.
During Strategy/Explore & Explain: 25 minutes
1. The teacher should give each student a copy of the Geologic Field Study Sheet (see attachments). It would be helpful for the students to have a clipboard for this portion of the lesson. If clipboards aren't available, the students can use a book, binder, or folder to support their paper while completing the geologic field study.
2. The teacher will lead students outside and allow them to travel around the school grounds to discover the mechanical and chemical impacts of water on the Earth's materials. As students participate in the field study, they should take notes on the Geologic Field Study Sheet (see attachments). This handout will require students to find at least ten examples of mechanical and chemical impacts detailed in the jot chart. Each example will include a description of the geologic event the student witnessed, the location where the student found this geologic event, the type of impact (mechanical or chemical), and the specific type of impact (erosion, oxidation, etc.). It may be helpful to the students to bring their notes created in the before strategy to the geologic field study activity.
Description: We saw a rock that looked like it had rust on it.
Location: We found this rock on the PE field.
Type of Impact: Chemical
Specific Impact: Oxidation
Note: The teacher should ensure that students are safe during the outdoor portion of this lesson. Depending on the students' experience and abilities, the teacher may allow students to travel freely, to travel within a particular confined space (as directed by the teacher), or travel as a class through a particular path around the school's grounds. The students may work individually, in partners, or in small groups (3-4 students) for this portion of the lesson.
After Strategy-Explain & Elaborate-50 minutes
1. The teacher should give each student a copy of the Data Interpretation and Analysis Sheet (see attachments). This handout will require students to create a bar and a circle graph to represent the data gathered during the field study. Each graph will depict the number of mechanical and chemical impacts each student found, as well as the specific type of impact (erosion, oxidation, etc.). After creating the graphical representations of the data, students will analyze the interactions between the hydrologic and rock cycles by answering three questions.
Note: The Data Interpretation and Analysis Sheet requires students to infer why they may have found more mechanical or chemical impacts of water during the geologic field study. These findings will be related to the location's climate: warmer, wetter climates produce more chemical impacts, while colder, drier climates produce more mechanical impacts.