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Lecture Comments (26)

0 answers

Post by Shahram Ahmadi N. Emran on June 8, 2015

don't you mean state change instead of stage change on example 4 for boiling water

0 answers

Post by Carroll Fields on April 13, 2015

If you were to leave hydrogen peroxide in a transparent bottle in the sun and it chemically changes into water , is it pure enough to drink.

0 answers

Post by Aniket D on March 30, 2014

Why is the melting and freezing point the same.

1 answer

Last reply by: Professor Ebs
Wed Jan 8, 2014 12:19 AM

Post by Olivia Lin on October 19, 2013

If iron and sulphur mix together by heating to form iron sulphide, the iron can't be attracted by magnet.

Therefore,Iron changes its properties.

If iron sulphide decomposite separate, can iron reverts its magnetism?

1 answer

Last reply by: Professor Ebs
Wed Jan 8, 2014 12:15 AM

Post by Olivia Lin on October 19, 2013

What are the differences between the homogeneous and sudstance?

For instance, the salt water consists of water and sodium chloride. But it can be a compound too if they are completely mixed together.
Is it correct?

1 answer

Last reply by: Professor Ebs
Sun May 19, 2013 3:48 PM

Post by Saakshi Dhingra on May 19, 2013

what are the 2 mixtures that look like solutions
I already know that one is a suspension, but i'm not sure what the other ones is (i think it might be a colloid)
this is a question on my final exam review.

0 answers

Post by Yisrael Harris on May 5, 2013

Hi, I have completed the Physical Science course, and I would like to say that I enjoyed it very much.

0 answers

Post by Doreen Wagner on December 13, 2012

After a balloon has been blown up and deflated, the latex becomes much more flexible. Is "becoming more flexible" a physical change?

0 answers

Post by Doreen Wagner on December 6, 2012

Why do bubbles keep coming from the bottom of a glass of soda? Is it undergoing a physical change or a chemical change?

0 answers

Post by Doreen Wagner on December 5, 2012

Is there a difference between something being malleable and flexible?

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Post by Doreen Wagner on December 4, 2012

When leaves change color is that a physical change

0 answers

Post by Doreen Wagner on December 4, 2012

Is there possibly more ways to see signs of a chemical change?

0 answers

Post by Doreen Wagner on December 2, 2012

is it possable to reverse the effects of oxidation?

1 answer

Last reply by: Professor Ebs
Wed Nov 28, 2012 1:36 PM

Post by chun yung on November 27, 2012

If u mix 2 substance each of they made out of 1 atom(not the same kind of atom) does it make it compound or mixture?

1 answer

Last reply by: Professor Ebs
Wed Nov 28, 2012 1:33 PM

Post by chun yung on November 27, 2012

Can u determind the difference of the a substance and misture by eyes?
IF u have a pure substance made out of 2 elements does that make compound or mixture?

1 answer

Last reply by: Professor Ebs
Wed Nov 28, 2012 1:31 PM

Post by Doreen Wagner on November 21, 2012

If you blew up a baloon and it deflated would that be a physical change?

1 answer

Last reply by: Professor Ebs
Fri Sep 14, 2012 12:04 PM

Post by Max Mayo on August 31, 2012

Heat and Temperature are two different things...

1 answer

Last reply by: Professor Ebs
Mon Aug 6, 2012 10:32 PM

Post by Della Stuckey on November 29, 2011

You said a increase or decrease in temperature for chemical change, but what about ice to water, that is increasing heat, but it is a physical change?

Properties of Matter

  • Matter is anything that has mass or takes up space.
  • All matter is made up of one or more elements
  • Matter that is pure and made up of a fixed composition is a pure substance.
  • A pure substance has a fixed composition, can be an element or a compound which is made up of more than one element. Compounds have different properties of elements that are bonded to form compounds
  • A mixture is made up of more than one pure substances
  • A heterogeneous mixture is where each component of the mixture is unevenly mixed and visible. If the particles settle in a liquid, the mixture is a heterogeneous suspension.
  • A homogeneous mixture is where the components of the mixture are evenly mixed and not visible. If the particles are dissolved, the mixture is a solution. If the particles are suspended, the mixture is a colloid.
  • A physical property is a characteristic that can be observed without being changed, like appearance, magnetism, and ductility.
  • A physical change is a change in a physical property where no new substance is formed.
  • A chemical property is a characteristic that indicates the ability of the substance to change into a new substance such as flammability or reactivity to light.
  • A chemical change is a change in a chemical property where a new substance is formed.

Properties of Matter

Since elements and compounds both have fixed compositions, they are classified as ______?
Substances
How would you classify a mixture in which visible particles settle?
A heterogeneous suspension.
What type of property can be observed without being changed?
A physical property
Physical properties can be based on ______ such as size, shape, and state of matter or ______ such as viscosity or ductility.
Appearance/Behavior
What type of change does not form a new substance?
A physical change
What process can you use to separate pure water from the mixture that we call coffee?
Use distillation to boil the pure water to separate it from the tiny coffee grounds in a cup of coffee.
If an object burns, has it undergone a chemical change or a physical change? Why?
A chemical change because it has changed into a different type of matter.
What type of change has occurred when you mix a solid and a liquid together and you see a flash of light and hear a popping sound?
A chemical change since both sound formation and light are signs of a chemical change.
When does a physical change occur?
A physical change occurs when a physical property changes.
What types of change(s) occur when a metal liquid is cooled and then pounded into a sheet?
Both changing from a liquid to a solid (state change) and pounding into a sheet (malleability) are physical changes.

*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.

Answer

Properties of Matter

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • Matter 0:07
    • Matter
    • Substance, Element, and Compound
    • Homogeneous and Heterogeneous Mixture
    • Suspension, Colloid, and Solution
  • Physical Properties 5:25
    • Appearance: Color, Shape, Size, Density, and State of Matter
    • Behavior: Viscosity, Magnetism, Malleability, and Ductility
  • Physical Changes 10:29
    • Physical Changes
  • Chemical Properties 14:38
    • Chemical Properties
  • Chemical Changes 16:35
    • Chemical Changes
    • Signs of Chemical Change
  • Example 1: Identify the Mixtures Listed 19:21
  • Example 2: Physical or Chemical Change? 23:38
  • Example 3: How Can You Separate a Mixture of Sand, Gravel, Iron, Filings, Salt, and Water? 25:04
  • Example 4: Physical/Chemical Property and Change 27:27