Question

poster draw a poster that illustrates how evidence of chemical reactions indicate that new substances with different properties are formed.

Explanation:

To create the poster, include images and text showing signs of chemical reactions like color - change, gas evolution, precipitate formation, and temperature change. These signs imply new substances with different properties are formed. For example, show iron rusting (color change from shiny metal to brown rust) indicating iron oxide formation. Also, include a simple chemical equation like $\text{CaCO}_3 + 2\text{HCl}
ightarrow\text{CaCl}_2+\text{H}_2\text{O}+\text{CO}_2\uparrow$ to illustrate gas evolution as evidence.

Answer:

A poster with visual examples of chemical - reaction evidence (color change, gas evolution, precipitate formation, temperature change) and simple chemical equations.