Unit 4 Vocabulary

01/12/2012

 
Reviewing this vocabulary may help you for the quizzes. You may not print off this page and use it on the quiz.

Lesson 1: Physical and Chemical Properties and Changes
  1. Physical property – a property of an object that can be observed without changing the object’s chemical identity (ex: mass, volume, texture, density, etc.)
  2. Physical change – a change in an object’s physical properties that does not change the object’s chemical identity.
  3. Chemical property – a property of an object that can only be reveal by chemically changing the object; a property that describes how an object will chemically change.
  4. Chemical change – a change that affects the object’s chemical identity; also causes a change to the object’s physical properties.

Lesson 2: Weathering
  1. Weathering – the process that breaks rocks down over time.
  2. Mechanical weathering – the process that breaks down rocks through physical changes.
  3. Chemical weathering – the process that breaks down rocks through chemical changes.
  4. Frost (ice) wedging – a type of mechanical weathering that breaks rocks apart when water freezes and expands in the openings of a rock.
  5. Salt crystal growth – a type of mechanical weathering that breaks rocks apart when salt crystallizes in the openings of a rock.
  6. Pressure release (unloading) – a type of mechanical weathering that breaks rocks apart when pressure is removed from a rock and the rock expands in that direction.
  7. Abrasion – a type of mechanical weathering that breaks rocks apart through friction.
  8. Biological activity – a type of mechanical weathering that breaks apart rocks through organisms causing physical changes.
  9. Dissolving – a type of chemical weathering in which an acid (usually carbonic) changes the chemical composition of the rock.
  10. Rusting – a type of chemical weathering in which water and oxygen cause changes to certain chemicals found in a rock producing iron oxide (rust)

Lesson 3: Rock Cycle
Vocabulary for this lesson will be posted when we study the rock cycle.
 


Comments


Comments are closed.