4.3.6 Recognize and describe that rock is composed of different combinations of minerals.

4.3.7 Explain that smaller rocks come from the breakage and weathering of bedrock and larger

rocks and that soil is made partly from weathered rock, partly from plant remains, and also contains

many living organisms.

Container of Soil and Rocks with a tight fitting lid

Printed SlidesPaperPencilColored PencilsMagnifying GlassPaper plateWater

A rock is made up of 2 or more minerals. A mineral is in a rock, but a rock can not be a mineral.

Soil is made up of many things as well. You will find minerals, rocks, living organisms, and dead or decaying organisms.

Use the definitions on the next slide , your science text book, and the internet to help you identify the contents of your sample.

• Igneous: A tough, frozen melt with little texture or layering; mostly black, white and/or gray minerals; may look like lava

• Sedimentary: Hardened sediment with layers (strata) of sandy or clayey stone; mostly brown to gray; may have fossils and water or wind marks

• Metamorphic: Tough rock with layers of light and dark minerals, often curved; various colors; often glittery from mica

• Use the magnifying glass to examine your sample. You may spread out a portion of your sample on the paper plate to help you get a better look.

Sketch and label your observationsWhat can you find in your soil sample? Are there any organisms in your soil sample? Can you find small bits of rock? Record what you find on your own paper.

Sketch your rocks and specify which one of the three types you believe each one to be.

Describe the properties of the rock that lead you to that conclusion

• Replace all of your sample in the container. • Add the whole bottle of water to the sample. Don’t

Shake.• Close tightly and observe what happens. Describe

below.Does it look different at the bottom? Is anything floating?

• You may now shake up your sample. Be carful not to drop your sample. Now re-examine the sample and note what has changed.

1) How many different rocks did you identify?a) 2b) 5c) 3d) 4

List them here: ____________________________________

True or False: Rocks are made of several different minerals.