Gr 9 NATURAL SCIENCES: CH 2.2 Thinking about chemical reactions

<p>Symbolic level</p> Signup and view all the answers

<p>Product</p> Signup and view all the answers

<p>The process of transformation of substances into other substances through the breaking and forming of bonds</p> Signup and view all the answers

<p>Submicroscopic level</p> Signup and view all the answers

<p>A molecule consisting of two hydrogen atoms and one oxygen atom</p> Signup and view all the answers

<p>A molecule consisting of two hydrogen atoms and one oxygen atom</p> Signup and view all the answers

<p>Liquid water in a beaker, which can be seen, touched, and measured</p> Signup and view all the answers

<p>A chemical formula indicating the ratio and type of atoms</p> Signup and view all the answers

<p>2H₂ + O₂ → 2H₂O</p> Signup and view all the answers

<p>Symbolic notation</p> Signup and view all the answers

<p>Steam or condensation</p> Signup and view all the answers

<p>Macroscopic observations into submicroscopic representations</p> Signup and view all the answers

<p>Submicroscopic</p> Signup and view all the answers

<p>Observing substances and their changes</p> Signup and view all the answers

<p>Is observable with the naked eye</p> Signup and view all the answers

<p>To help scientists visualize and describe the changes that occur during chemical reactions</p> Signup and view all the answers

<p>Submicroscopic</p> Signup and view all the answers

<p>The macroscopic level describes the observable changes, while the submicroscopic level explains the underlying particles and bonds</p> Signup and view all the answers

<p>It allows for a more comprehensive understanding of chemical reactions</p> Signup and view all the answers

<p>It enables scientists to communicate their findings more effectively.</p> Signup and view all the answers

<p>The reactants combine with a visible flame or explosion.</p> Signup and view all the answers

<p>The submicroscopic representation is more detailed, while the symbolic representation is more concise.</p> Signup and view all the answers

<p>A decomposition reaction.</p> Signup and view all the answers

<p>To communicate the reaction to other scientists more effectively.</p> Signup and view all the answers

<p>Two hydrogen molecules react with one oxygen molecule.</p> Signup and view all the answers

<p>It helps scientists to communicate their findings more effectively and develop a deeper understanding of the reaction.</p> Signup and view all the answers

<p>The submicroscopic representation focuses on the atoms and molecules, while the macroscopic representation focuses on the observable changes.</p> Signup and view all the answers

<p>To visualize and describe the changes that occur during chemical reactions</p> Signup and view all the answers

<p>The focus on the changes that occur during chemical reactions</p> Signup and view all the answers

<p>The use of models versus chemical symbols</p> Signup and view all the answers

<p>It is easily communicable to a broad audience</p> Signup and view all the answers

<p>To provide a comprehensive understanding of chemical reactions</p> Signup and view all the answers

<p>It provides a deeper understanding of chemical reactions</p> Signup and view all the answers

<p>It provides a concise and precise representation of chemical reactions</p> Signup and view all the answers

<p>To understand the composition and transformation of matter</p> Signup and view all the answers

<p>The macroscopic level is more concrete than the symbolic level</p> Signup and view all the answers

<p>It provides scientists with a more complete understanding of chemical reactions</p> Signup and view all the answers

<p>The submicroscopic representation involves visualizing the particles, whereas the symbolic representation uses chemical symbols and formulae</p> Signup and view all the answers

<p>To communicate the ratio and type of atoms in the reaction</p> Signup and view all the answers

<p>The number of hydrogen molecules is twice the number of oxygen molecules</p> Signup and view all the answers

<p>It provides scientists with a more comprehensive understanding of chemical reactions</p> Signup and view all the answers

<p>The macroscopic level involves observing the reaction with our senses, whereas the submicroscopic level involves visualizing the particles</p> Signup and view all the answers