Silicon is a metalloid, an element with properties of both metals and non-metals. Silicon exists in two allotropic forms. Allotropes are forms of an element with different physical and chemical properties.One allotrope is in the form of shiny, grayish-black, needle-like crystals, or flat plates.The second allotrope has no crystal structure and usually occurs as a brown powder.ilicon exists in two allotropic forms. Allotropes are forms of an element with different physical and chemical properties. One allotrope is in the form of shiny, grayish-black, needle-like crystals, or flat plates. The second allotrope has no crystal structure and usually occurs as a brown powder.
The Summative Assessments are comprehensive end of year assessments of grade-level learning that measure progress toward college and career readiness.
Making formative use of summative assessment means using information derived from summative assessment to improve future student performance. 1  For the teacher it involves: 2  providing a range of assessment tasks and opportunities to make certain that a range of student learning styles are catered for.