Properties and Changes! Flashcards
Physical Property (two ways) and another word for property! What does it lead to?
A CHARACTERISTIC of a substance that you can observe/ measure that won’t change the identity of the substance. Or.. are measurable characteristics of something observable, without changing the composition or identity of the object or substance that will lead to a physical change.
Examples of physical property starters and a few examples:
Melting point, boiling point, (all phase change points), mass, volume, length, density, texture, breakable, bendable, flexible, magnetism/attraction, stretching, elastic, viscosity.
- Separating the OREO mixture by licking out the icing in the middle. (You are using physical properties by shape, size, color).
- When iron and sand combine they are not separated by size, but by the physical property of attraction to magnets.
Chemical Property
A characteristic/ ability of a substance that will result in a change in identity and will lead to a chemical change. (One to another)
Examples of chemical properties:
Flammability, oxidation, reactive, acidity, corrosion, combustibility, explosive, toxicity.
Properties and Changes are to science as_____ is to English.
Properties: Adjectives- describing words. Change: action words- verbs.
What is another word for change?
From/ To!
Physical Changes are a change in…
Shape, size, or form/SOM. (CHANGE IN APPEARANCE)
An example of physical changes being reversed?
Liquid water to ice and back to liquid water. (ONLY SOMETIMES)
Physical Change
Still the same material, but in a different shape, size, or form. Involve energy changes, but the kind of substance- the identity of element and compounds do not change.
Physical Change examples of starters:
Ex, breaking/broken, chewing, cracking. cutting, crinkling, chopping, blending, mixing, tearing, crushing, dissolving (depends), painting, sawing, sharpening, sewing together, phase changes, and bending.
Another name for chemical change?
REACTION.
Chemical Changes are a change in..
Identity- one substance to another and molecular changes.
Chemical changes are…
Irreversible
The atoms in chemical changes..
Separate and new substances are created.
During a chemical changes, are atoms lost or gained?
During a chemical change atoms are not lost of gained when changing from one substance to another even if it is a new size of shape. (The law of conservation of mass).
Example of the law of conservation of mass and explain.
Ex, a burning log turning into ashes. (The Mass was not lost in the chemical change even if the pile of ashes is smaller because you have to take into consideration that if you collected all the oxygen in the air that was combined with the log during the burning and all the smoke and gas that escaped from the burning log it would be equal.)
Chemical Change example starters:
Ex, cooking, baking, BBQing, molding, fizzing, odor (some), bubbles, sizzling, exploding, rusting, grilling, combining, toasting, burning, sugar caramelizing, digesting, producing, turning black.
Examples of color for physical change and chemical change.
Physical- nails and food dye. Chemical- hair and mold.
Example of physical and chemical changes.
Ex, shredding paper, chopping logs, salt water, breaking your collarbone, heating iron (change in appearance- color), and food being broken down by your teeth.
Why do all physical and chemical changes in matter include a change in energy?
For physical changes: matter can change state when it loses or gains thermal energy. For chemical changes, they are ALWAYS transfering to a new substance!
Distillation and explain.
Is a process for separating substances in a mixture by evaporating a liquid and re-condensing its vapor. Using an apparatus. (Physical means) Vapor of the liquid with the boiling point forms first.
What is the evidence that a physical change has taken place?
It is still the same substance, has the same identity, and is the same material but in a different shape, size, or form/SOM.
Identity
What you are made up of.
What causes energy changes?
Adding or removing heat. (Increasing or Decreasing)
