McGraw-Hill Grade 4 Unit C Earth & Beyond Ch. 5 Lesson 1-4
Terms
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- GRAVEL, SAND, AND CLAY CARRIED FROM GLACIERS BY MELTING WATER AND STREAMS.
- OUTWASH PLAIN
- A FOSSIL CREATED BY A PRINT OR IMPRESSION.
- IMPRINT
- A HARD LAYER OF CLAY AND MINERALS THAT LIES BENEATH TOPSOIL.
- SUBSOIL
- ROCK FORMED FROM BITS OR LAYERS OF ROCKS CEMENTED TOGETHER.
- SEDIMENTARY ROCK
- A BREAK IN EARTH'S OUTER LAYER CAUSED BY THE MOVEMENT OF ROCKS.
- FAULT
- AN ISOLATED BOULDER LEFT BEHIND BY A GLACIER.
- ERRATIC
- LEFTOVER DECOMPOSED PLANT AND ANIMAL MATTER IN THE SOIL.
- HUMUS
- "FIRE-MADE" ROCK FORMED FROM MELTED ROCK MATERIAL.
- IGNEOUS ROCK
- THE END, OR OUTER MARGIN, OF A GLACIER WHERE ROCK DEBRIS ACCUMULATES.
- TERMINUS
- THE DARK, TOP LAYER OF SOIL, RICH IN HUMUS AND MINERALS,IN WHICH MANY TINY ORGANISMS LIVE AND MOST PLANTS GROW.
- TOPSOIL
- A NATURALLY OCCURRING SUBSTANCE, NEITHER A PLANT NOR AN ANIMAL.
- MINERAL
- A FOSSIL CLEARLY SHOWING THE OUTSIDE FEATURES OF THE ORGANISM.
- MOLD
- MOVEMENT OR VIBRATION IN THE ROCKS THAT MAKE UP EARTH'S CRUST.
- EARTHQUAKE
- HARDENED TREE SAP, YELLOW TO BROWN IN COLOR, OFTEN A SOURCE OF INSECT FOSSILS.
- AMBER
- AN UNSORTED MIXTURE OF ROCK MATERIALS DEPOSITED AS A GLACIER MELTS.
- GLACIAL TILL
- A LAYER OF SOIL DIFFERING FROM THE LAYERS ABOVE AND BELOW IT.
- HORIZON
- ROCK DEBRIS CARRIED AND DEPOSITED BY A GLACIER.
- MORAINE
- THE AGE OF SOMETHING COMPARED TO THE AGE OF ANOTHER THING.
- RELATIVE AGE
- A VERTICAL SECTION OF SOIL FROM THE SURFACE DOWN TO BEDROCK.
- SOIL PROFILE
- A NEVER-ENDING PROCESS BY WHICH ROCKS ARE CHANGED FROM ONE TYPE TO ANOTHER.
- ROCK CYCLE
- ANY OF THE TINY GAPS BETWEEN SOIL PARTICLES, USUALLY FILLED WITH WATER AND AIR.
- PORE SPACE
- THE RATE AT WHICH WATER CAN PASS THROUGH A MATERIAL.
- PERMEABILITY
- A LARGE MASS OF SNOW AND ICE THAT SLOWLY MOVES DOWNWARD AND OUTWARD OVER THE LAND.
- GLACIER
- A FOSSIL FORMED OR SHAPED WITHIN A MOLD.
- CAST
- ROCK WHOSE FORM HAS BEEN CHANGED BY AND HEAT AND/OR PRESSURE.
- METAMORPHIC ROCK