Students say "Rocks Rock! With this Clever Catch. Test your students ability to recall important rock facts.This 24" inflatable ball makes learning about Rocks and their properties a bunch of fun! Play a quick game by tossing the ball back and forth between two students or a group, and wherever the students left thumb lands is the question that gets answered!! Teacher?s answers and instructions for game play are included on the enclosed answer sheet. Examples of the 96 questions:
This is a great little pocket guide to rocks and minerals. It uses color drawings to illustrate the rocks and minerals which I find is far more handy that pictures of museum quality specimens. Rocks and minerals in the field often don't know what they're supposed to look like so they are more average than those museum exhibits!
This is Estwing's newest geological tool and sure to become the standard the rock pick carried by geologist and rockhounds.
The main differences between the hammer (Big Face) and the Estwing Supreme 22oz Pointed Tip Rock Hammer is the new Big Face has, wait for it, a bigger face. Think of it like a bull dog or a pug. It's like the 22oz hammer's striking edge is "pushed in" towards the shaft. Like a mountain range created when two plates collide! Or like that day you spent hours pounding away on a chisel. The 22oz hammer's head is about 7/8'' square while the Big Face hammer's head is 1 1/8'' square, about a 1/4'' bigger on each side. Speaking of chisels, this rock hammer's head makes it much better for driving chisels.
Overall the weight of the Estwing Supreme Big Face 24 oz Pointed Tip Rock Hammer E6-24PC and the Estwing Supreme 22oz Pointed Tip Rock Hammer E3-22P are about the same. The Big Face has extra head weight which imparts a more powerful impact, but the overall weight was held the same by attaching the grip to the handle shaft in a different way. (see the images below)
Light enough to easily carry but heavy enough to crack some rock. Estwing Supreme quality in a one-piece forged pointed tip rock pick. Fully polished solid steel with the Estwing shock absorbing nylon-vinyl grip which has been tested to reduce shock by 50%.
|Head Width||7 inches|
|Overall Length||13 1/2 inches|
|Head Weight||24 ounces|
|Total Weight||2 pounds|
24 specimens, 1 1/4", including six each of the following: rock-forming minerals, igneous, sedimentary and metamorphic rocks. Also includes a study guide.
ROCK AND ROCK-FORMING MINERALS
Minerals are naturally occurring chemical compounds or elements found in the earth's crust and are the building blocks of rocks. Rocks may contain only a single mineral, but usually they contain a mixture of many minerals.1. Quartz - Silicon dioxide, or quartz, is the most common mineral in the earth's crust.
Igneous rocks were once lava or magma, that is, a molten collection of minerals. The rate at which a lava or magma cools and solidifies influences rock texture, making it either fine, medium or coarse grained.7. Pumice - A light colored volcanic rock of rhyolitic composition; the texture results from bubbles formed by escaping gasses.
Metamorphic rocks are rocks that have been changed (metamorphosed), by heat, pressure, and/or hydrothermal solutions. All three rock types can be metamorphosed.13. Mica Schist - This rock is a highly metamorphosed shale. All schists exhibit shistose structure; the generally parallel alignment of micaceous minerals.
Clastic sedimentary rocks are formed from layers of sediment (fragments of older, weathered rock) exposed to pressure. Other sedimentary rocks are of organic or chemical origin.19. Sandstone - Quartz grains cemented together by silica, calcite or other cementing minerals make up this clastic, sedimentary rock.
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