1 / 8

Understanding the Physical and Chemical Properties of Trees

This lesson explores the physical and chemical properties of trees, emphasizing observable characteristics and chemical changes. Students will learn that physical properties include size, shape, and density, while chemical properties encompass photosynthesis, flammability, and decay. The concepts of physical and chemical changes are made clear through examples like oxidation and corrosion. Additional discussions will cover signs of chemical changes, including color changes, gas production, and energy shifts. Engage with worksheets that reinforce these important scientific principles.

alair
Télécharger la présentation

Understanding the Physical and Chemical Properties of Trees

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Thursday 2-21-13 • WU • List 3 physical properties of a tree. • List 2 chemical properties of a tree. • Go over Force & Motion CBA • Physical/Chemical properties & changes • Worksheet

  2. Physical Properties of a tree • Solid, hard, with rings indicating age • Density is less than water (floats) • Brown trunk, green leaves, opaque • Size & shape • Nonconductor, nonmetal • Not malleable or ductile

  3. Chemical Properties of a tree • Ability to: • Photosynthesis • Flammable • Rot, Decay • Grow

  4. Physical Properties • Quality that can be observed or measured without changing chemical composition • Color, odor, taste, texture, state • melting point, boiling point, solubility, conductivity, density, malleability, ductility,magnetism

  5. Chemical Properties • Ability of a substance to react & form a new substance. • Oxidation – “react with oxygen” • Flammability • Corrosion –breakdown of a metal • Rusting – occurs on iron • Tarnish – dark spots on silver colored metals • Decay / rotting / fermentation / growth • Photosynthesis/Respiration

  6. Photosynthesis • Carbon Dioxide + Water  Glucose + Oxygen • CO2 + H2O C6H12O6 + O2 Respiration • Glucose + Oxygen  Carbon Dioxide + Water C6H12O6 + O2  CO2 + H2O

  7. Signs of a chemical change 1. Color change due to reaction 2. Production of gas • Bubbles, smoke, change in odor 3. Change in energy due to reaction • Gets warm or cold • Emits sound • Emits light 4. Loss of identity • New & different physical & chemical properties form

  8. Physical Changes • Keeps same chemical composition • Mixing or dissolving (Changing shape or size) • Solution – one substance dissolved in another • Alloy = 2 metals that were mixed when in liquid state, then allowed to harden • Brass, Bronze, Steel • Phase changes • Melting, freezing, evaporating, condensing, sublimating

More Related