Homework tonight:
Copy vocab into your science notebooks:

Vocabulary: write words in notes section, words + definitions in vocab section

•      Clay - microscopic particles of rock found in soil.

•      Decomposing - breaking down.   Compare the word: Composition

•      Evidence - Information from direct observation or reliable sources that can be used to support ideas or decision-making.

•      Nutrients - basic chemicals from organic matter that plants use to feed & grow Ex: N, P, K.

•      Observation – information gained using the 5 senses, or instruments to enhance them.  Ex: microscope, stethoscope.

•      Opinion - A personal belief, not necessarily supported by facts.

•      Organic matter (a/k/a “humus”) - decomposing plants, animals, fungi, bacteria. Matter is organic if it is, or was once, alive.

•      Particles - small pieces of matter. Ex: Broken particles of rock found in soil include sand, silt and clay.

•      Rock - Naturally-formed solids made up of 1 or more minerals. Ex: granite, sandstone, basalt.

•      Sand - largest particles of rock in soil other than pebbles. Grains are .05 to 2 mm in diameter.

•      Silt - particles of rock smaller than sand found in soil.

•      Weathering - how natural forces wear down rocks over time. Ex: break down from wind, water, or falls; freezing - warming cycles, & chemicals like acid.