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Tag Archives: Chemical

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Metals: Chemical & Physical properties

ScienceBy William Anderson (Schoolworkhelper Editorial Team)April 9, 2016Leave a comment

Physical properties 1) Physical state – Metals are solids at room temperature e.g. sodium, aluminum ,potassium, magnesium. There are exception to this. Mercury and gallium are metals but they are in liquid state at room temperature. 2) Luster – Metals have a shining surface called luster when freshly prepared. They have a quality of reflecting…

Nickel and Copper: Chemical & Physical Properties

ScienceBy William Anderson (Schoolworkhelper Editorial Team)May 18, 20121 Comment

Copper is derived from the Latin word cuprum, which means “from the island of Cyprus”.  Copper has been put to use for at least 11,000 years according to archaeologists. Ancient people found copper in “nuggets and masses on the surface of the Earth, adjacent to streams, in the walls of canyons” (Lugaski, 1997, n.p.).  Throughout…

Weathering & Soils

ScienceBy William Anderson (Schoolworkhelper Editorial Team)January 29, 20111 Comment

After rocks are formed, they are weathered when exposed at the surface; this prepares material for transport by erosional processes in the rock cycle two main types of weathering include mechanical (disintegration) and chemical (decomposition) that act together and enhance the effectiveness of each other Mechanical: reduction of rocks to smaller pieces, includes: Frost wedging…

Models of Matter: Particle Model

ScienceBy William Anderson (Schoolworkhelper Editorial Team)August 18, 2010Leave a comment

Up to now, we’ve been looking at how matter reacts and changes on a large scale.  Now, we’re going to examine why matter changes.  To do this, we need to break matter down into its smallest units to understand how it works. THE PARTICLE MODEL All matter can be broken down into smaller pieces until…

The Digestive System: Function and Structure

ScienceBy William Anderson (Schoolworkhelper Editorial Team)July 1, 20102 Comments

Function of the Digestive System: To change foods you eat into chemical forms your body can use and eliminate anything that can not be used by your body. Food is typically in a form that is completely unsuitable for use by body cells. Food becomes useful only after it has been converted into smaller, simpler…

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