Properties and Changes!

Question 1

Physical Property (two ways) and another word for property! What does it lead to?

Answer 1

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.

Question 2

Examples of physical property starters and a few examples:

Answer 2

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.

Question 3

Chemical Property

Answer 3

A characteristic/ ability of a substance that will result in a change in identity and will lead to a chemical change. (One to another)

Question 4

Examples of chemical properties:

Answer 4

Flammability, oxidation, reactive, acidity, corrosion, combustibility, explosive, toxicity.

Question 5

Properties and Changes are to science as_____ is to English.

Answer 5

Properties: Adjectives- describing words. Change: action words- verbs.

Question 6

What is another word for change?

Answer 6

From/ To!

Question 7

Physical Changes are a change in…

Answer 7

Shape, size, or form/SOM. (CHANGE IN APPEARANCE)

Question 8

An example of physical changes being reversed?

Answer 8

Liquid water to ice and back to liquid water. (ONLY SOMETIMES)

Question 9

Physical Change

Answer 9

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.

Question 10

Physical Change examples of starters:

Answer 10

Ex, breaking/broken, chewing, cracking. cutting, crinkling, chopping, blending, mixing, tearing, crushing, dissolving (depends), painting, sawing, sharpening, sewing together, phase changes, and bending.

Question 11

Another name for chemical change?

Answer 11

REACTION.

Question 12

Chemical Changes are a change in..

Answer 12

Identity- one substance to another and molecular changes.

Question 13

Chemical changes are…

Answer 13

Irreversible

Question 14

The atoms in chemical changes..

Answer 14

Separate and new substances are created.

Question 15

During a chemical changes, are atoms lost or gained?

Answer 15

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).

Question 16

Example of the law of conservation of mass and explain.

Answer 16

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.)

Question 17

Chemical Change example starters:

Answer 17

Ex, cooking, baking, BBQing, molding, fizzing, odor (some), bubbles, sizzling, exploding, rusting, grilling, combining, toasting, burning, sugar caramelizing, digesting, producing, turning black.

Question 18

Examples of color for physical change and chemical change.

Answer 18

Physical- nails and food dye. Chemical- hair and mold.

Question 19

Example of physical and chemical changes.

Answer 19

Ex, shredding paper, chopping logs, salt water, breaking your collarbone, heating iron (change in appearance- color), and food being broken down by your teeth.

Question 20

Why do all physical and chemical changes in matter include a change in energy?

Answer 20

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!

Question 21

Distillation and explain.

Answer 21

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.

Question 22

What is the evidence that a physical change has taken place?

Answer 22

It is still the same substance, has the same identity, and is the same material but in a different shape, size, or form/SOM.

Question 23

Identity

Answer 23

What you are made up of.

Question 24

What causes energy changes?

Answer 24

Adding or removing heat. (Increasing or Decreasing)

Question 25

Can most objects melt?

Answer 25

Yes, most objects can melt.

Question 26

What is chemical about iron and what is physical?

Answer 26

Iron turning into rust is chemical, but heating iron and it turning red is a physical change. (APPEARANCE)

Question 27

What are other ways to separate mixtures?

Answer 27

Separating funnel, sifting, chromatography, and water filters.

Question 28

Why do some medicines have darker colored bottles? Ex.

Answer 28

They have darker colored bottles because some medicines can react with light. Color- property. Ex, Hydrogen Peroxide, a compound.

Question 29

What are some indicators that a chemical change has taken place?

Answer 29

Burning (odor), formation of bubbles, sizzling, cooling, production of sound and heat.

Question 30

What is the main indicator that a chemical change has taken place?

Answer 30

A new substance is formed!

Question 31

Oxidation and Examples

Answer 31

Reacts with oxygen. Ex, molding, rotting, rusting, etc.

Question 32

Two examples of chemical changes?

Answer 32

Tanning is chemical change either from the sun or a tanning bed and the statue of liberty rusting!

Question 33

Why is dissolving a physical change?

Answer 33

Due to Distillation

Question 34

Examples of chemical changes:

Answer 34

Ex, for chemical; Fireworks, iron turning into rust- Oxidation, rotten eggs, baking brownies, anti-acid= fizzing, food being broken down by enzymes in your stomach, and when hydrogen peroxide is poured on skin, it breaks down into water and oxygen gas, burning logs.

Question 35

Is weathering a chemical or physical change? Explain.

Answer 35

Weathering is a physical change for the reason that rocks break, and water freezes and expands, and streams cut through softer rocks, forming canyons, that can smooth and sculpt harder rock. The stream carries its particles down the stream until desposited. (THE PARTICLES ARE STILL UNCHANGED)

For chemical: Acidic- like sour candy! Oxidation- change in limestone. Reacts and turns into a new substance.

Question 36

Practice the chart!

Answer 36

;)