Learning about rocks

In this lesson, students will be engaged in hands-on experiences while they explore rocks.

A lesson plan for grade 1 Mathematics and Science

By Debbie Hansman

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Related topics

• Learn more about geology and science.

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Learning outcomes

During the unit, students will:

• classify rocks
• learn about the properties of rocks
• become “geologists”
• learn what happens when rocks bump into each other

Teacher planning

Time required for lesson

5 days

Materials/resources

• rocks
• homemade Play Dough
• beads, glitter, rock fragments, buttons, etc.
• chocolate chip cookies
• toothpicks
• paper clips
• play-money pennies
• grid paper
• scale
• ruler
• penny
• nail
• vinegar with pipette
• container with water
• numbered rocks
• empty school milk carton
• seven sugar cubes
• three pieces black construction paper
• transparency of cookie mining spreadsheet and Rock Cycle
• The Magic School Bus Inside The Earth, by Joanna Cole
• Be A Geologist Activity sheet

Technology resources

• computer
• overhead projector

Pre-activities

• Instruct students to bring in ten rocks of various sizes.
• Invite students to recall their experiences with rocks.
• Rock Cycle.
• Explain the classification system of rocks (sedimentary, igneous, metamorphic).
• Share The Magic School Bus Inside The Earth, by Joanna Cole.

Activities

• Rock classification. Provide a variety of rocks for groups of students to sort in various ways (size, color, kinds, etc.) Groups will graph and discuss results. As an extension, students can choose a rock and do a Circle Thinking Map to describe it.
• Make a rock. Students make a model of a sedimentary rock using homemade playdough, beads, glitter, rock fragments, buttons, etc. They will roll their playdough into the collected items to make their own rock. As an extension, have students name their rock (Meganite) and make a Bubble Thinking Map to describe it.
• Cookie Mining activity (reclamation). This activity introduces the students to mining and the importance of taking care of the land as it’s mined. This can be done as a whole group activity, using a transparency of the activity sheets. Follow instructions and rules on attached activity sheet and spreadsheet.
• Be A Geologist. Students become geologists and measure, weigh, and test a rock of their choice using the instructions on the activity sheet.
• Bumping Rocks. Students learn how rocks change and become round. Place one sugar cube on one sheet of black construction paper. Place the remaining six sugar cubes in the empty milk carton. Pretend the cubes are rocks. Close the milk carton and shake it twenty-five times. Empty the carton onto another sheet of black construction paper. Place it next to the whole sugar cube for students to observe and write about it in their science journals. Return four of the sugar cubes back in the carton and shake fifty times. Empty carton onto the remaining sheet of black construction paper. Discuss observations and instruct students to write about what happened in their science journals.

Assessment

• Check for understanding and participation in student bservations and discussions.
• As each step of Cookie Mining Spreadsheet is completed, circulate around the room to check the students’ sheets for accuracy.
• Completed Be A Geologist activity. Before starting the lessonvgather, clean, and number rocks. Make an answer key to use as you check the students’ work. For example:
  1. white with gray streaks, 2 inches long, 2 lbs.
• Science journal entries.

Supplemental information

For more information about thinking maps, see Thinking Maps: Tools for Learning by David Hyerle, Ed D. Innovative Learning Group, 1995.

Background information

Rocks cover the entire surface of the earth, even below bodies of water. This is called the earth’s crust. Some areas of the crust are covered by dirt or soil, which consists of crushed rock.

There are three types of rock: igneous, sedimentary, and metamorphic.

• Igneous: Melted rock called magma is under tremendous pressure and sometimes rises through cracks in the crust. When it solidifies, it is called igneous rock. Magma may cool underground or break through, creating volcanoes that pour lava (magma) above ground. Cooled magma is igneous rock.
• Sedimentary: Sedimentary rocks consist of rocks that once were igneous, metamorphic, sedimentary, or organic material. These materials are deposited in layers by wind, water, or ice. As the layers build up, the pressure packs it together and squeezes out most of the water and forms solid rock layers. Sediments may consist of rock fragments ranging in various sizes, from boulders to grains of sand and silt. These rocks may also be deposits of minerals in the form of crystals or organic sediments (shells, skeletons, and plants). Fossils are found in sedimentary rocks.
• Metamorphic: Metamorphic rock is igneous, sedimentary, or metamorphic rock, which is subjected to tremendous pressure and heat by movement of the earth’s crust or contact with magma. The original rock changes in appearance and often in mineral composition. For example, granite (an igneous rock) becomes gneiss and calcite in limestone (a sedimentary rock) changes to marble.

Comments

These activities will take several days to complete. The students’ work samples can be saved and displayed during a Science Fair night at school.