Dirt and Plants

Unit Review Sheet

Facts and Definitions

Lesson 1: Soil

• Soil is made up of sand, silt, gravel, clay, and organic matter (rotting things that were once living, i.e., dead leaves and twigs).
• The layers of soil include humus, topsoil, subsoil, and parent material.

Lesson 2: Plants

• A flowering plant has flowers, and a nonflowering plant has no flowers.
• A woody plant survives from one year to the next and has a stem that contains wood.
• An herbaceous plant has leaves and stems that die at the end of the growing season.

Lesson 3: Seeds

• The parts of a seed are the seed coat, stored food, and the embryo.
• Germination is the process through which a seed grows into a plant.
• The male part of a plant is the stamen, and the female part is the pistil.

Lesson 4: Photosynthesis

• Photosynthesis is the process by which a plant makes its own food.

Lesson 5: Trees

• Evergreen trees do not change colors in the fall and winter.
• Deciduous trees are trees that lose all their leaves for part of the year.

Lesson 6: Compost and Decomposers

• Decomposition is the process by which dead plants and animals are broken down into simpler substances.
• Decomposers are the living things that break down dead plants and animals in the soil.

Lesson 7: Plants, Animals, and People

• A variety of products in our home come from plants.

Final Project: A New Species of Plant

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