Fourth Grade Science: Chapter 7--The Rock Cycle
Lesson 1: What are the types of rocks?
Objectives:
- Make a model to see how sedimentary rock forms.
- Describe what minerals are.
- Identify the three types of rocks (igneous, sedimentary, and metamorphic).
Lesson 2: What Is the Rock Cycle?
Objectives:
- Model the steps in the rock cycle.
- Explain what the rock cycle is.
- Describe the processes that take place during the rock cycle.
Lesson 3: How Do Weathering and Erosion Affect Rocks?
Objectives:
- Experiment to see how rocks break down.
- Describe how weathering affects rock.
- Explain how erosion affects rock.
Lesson 4: What is Soil?
Objectives:
- Compare particle sizes in different types of soil.
- Describe what soil is.
- Explain how soil forms, and how soils differ.
Science Vocabulary
mineral: A solid substance that occurs naturally in rocks or in the ground.
rock: A solid substance made of one or more minerals.
igneous rock: A type of rock that forms from melted rock that cools and hardens.
sedimentary rock: A type of rock that forms when layers of sediment are pressed together.
metamorphic rock: A type of rock that forms when heat or pressure change an existing rock.
rock cycle: The sequence of processes that change rocks from one type to another over long periods.
weathering: The breaking down of rocks on Earth's surface into smaller pieces.
erosion: The process of moving sediment from one place to another.
humus: the remains of decayed plants or animals in the soil.
horizon: A layer in the soil.
bedrock: The solid rock that forms Earth's surface.
sand: The largest particles that make up soil.
clay: THe smallest particles that make up soil.