th 8 grade STAAR Voc Gr 8 Staar

th 8 grade STAAR Voc

Gr. 8 -Staar Voc List 2 • Information collected using the five senses • Any pieces of information gathered through experimentation • A possible explanation to a question • Conclusion • A statement that sums up the results of a scientific investigation • Theory • A unifying explanation for a broad range of hypotheses and observations that have been SUPPORTED by testing • Observation • Data • Hypothesis

List 3

List 4 Vocabulary • • Periodic Table – a chart that shows all the elements arranged by atomic number and by properties. • • Groups/Families – each vertical column (top to bottom) of elements on the periodic table. • • Periods – each horizontal row (from left to right) of elements on the periodic table. • • Metals – elements that are good conductors of electricity and heat. • • Non-metals – elements that are poor conductors of electricity and heat. • • Metalloids – elements that have properties of both metals and nonmetals; sometimes referred to as semiconductors • •

List 5 • chemical change a change that occurs in substances that cannot be reversed or undone, such as a piece of wood burning or iron changing to rust; a new substance is formed • chemical formula a shorthand notation that uses chemical symbols and numbers to represent a substance (example Na. Cl) • chemical reaction the process by which one or more substances change to produce one or more different substances • Coefficient –number written in front of the chemical formula and indicates the number of molecules • subscript a number written below and to the right of a chemical symbol in a formula; tells the number of atoms of that element