Solutions for Chapter 7.3: Determination of Pi Terms

An instrument used to determine wind speed.

A hard, metamorphic form of coal that burns clean and hot.

A compositional group of igneous rocks indicating that the rock contains substantial dark silicate minerals and calciumrich plagioclase feldspar.

An imaginary hollow sphere upon which the ancients believed the stars were hung and carried around Earth.

A chemical bond produced by the sharing of electrons.

The distance from the lens to the point where it focuses parallel rays of light.

The resistance a mineral offers to scratching.

The nuclear reaction in which hydrogen nuclei are fused into helium nuclei.

A mass of glacial ice covering a high upland or plateau and spreading out radially.

A subatomic particle found in the nucleus of an atom. The neutron is electrically neutral and has a mass approximately that of a proton.

Stars rich in atoms heavier than helium. Nearly always relatively young stars found in the disk of the galaxy.

A chain of thermonuclear reactions by which nuclei of hydrogen are built up into nuclei of helium.

Drops of water that fall from clouds that have a diameter of at least 0.5 millimeter (0.02 inch).

Any one of numerous minerals that have the oxygen and silicon tetrahedron as their basic structure.

A flattened, rotating galaxy with pinwheel-like arms of interstellar material and young stars winding out from its nucleus.

One of three basic cloud forms; also, the name given one of the flow clouds. They are sheets or layers that cover much or all of the sky

The conversion of a solid directly to a gas without passing through the liquid state.

The fine sediment carried within the body of flowing water.

Radiation with a wavelength from 0.4 to 0.7 micrometer.

The solstice that occurs on December 21–22 in the Northern Hemisphere and on June 21–22 in the Southern Hemisphere.