Chemical and Physical Changes



Chemical and physical changes

Say hello to Mark and Molly. Each are enjoying a glass of water. Deciding to save some for later Molly puts her glass in the refrigerator but Mark puts his in the freezer. A short time later they go to get their drinks. Molly enjoys her cold liquid water but something has happened to Marks water. His water has physically changed.

Matter can change chemically or physically. An ice cube is frozen water. A closer look into the ice will show that water is H2O or molecules made of hydrogen and oxygen atoms. When the ice cube melts the molecules stay H2O they just change from solid to liquid. Even when water evaporates the molecules might be moving a little faster but they are still water molecules.

Another example of a physical change would be bending iron metal. Iron can be made into I beams or pressed into shapes to make the body of a car. Whether the iron is in a beam or on a car it is still Fe atoms just in a different shape.

A chemical change occurs when an entire new material is created or the atoms of a substance become rearranged. Iron rusting is a chemical change because iron turns into a new material we call rust. The process of rusting can be seen in a chemical formula. Iron + water + oxygen yields iron iii oxide or rust. In this chemical equation we start with iron but end up with something new.

Another chemical change happens inside of your body when you eat sugars. Sugar enters your body as C6H12O6. Then when you breath in oxygen gas a chemical change begins. The sugar is broken down and turned into carbon dioxide and water. The sugar molecule has chemically changed.

Another chemical change happens when you drive a car. Gasoline enters your car as octane. Octane is C8H18. In you engine oxygen is introduced and the octane changes into carbon dioxide and water. This is a chemical change because the octane is no longer a molecule.

You can tell the difference between chemical and physical changes because chemical changes can’t be easily undone but lucky for mark physical changes can be undone and his glass of water has almost changed back to a liquid.

source

50 thoughts on “Chemical and Physical Changes

  1. i have noo friendns but i am friends with youtube yay i can watch stuff forever and i like one person called pikachu because i am friends with a weibo called Floyt

  2. ╭━━━━━━━━━━━━━━━━━━━━━━━━-╮
    ┃ ════════ ● ┃
    ┃ SAMSUNG ┃
    ┃ ┃
    ┃███████████████████████████████████
    ┃█ Missed call from Rhett .:| [█] 17:28 c █┃
    ┃█ ━━━━━━━━━━━━━━━━━━━━━━ █┃
    ┃█ █┃
    ┃█ █┃
    ┃█ █ ████ ██ ██ █┃
    ┃█ ██ █ ██ █ █ █ █ █┃
    ┃█ █ █ █ ██ █┃
    ┃█ █ █ ██ █ █ █ █┃

  3. ╭━━━━━━━━━━━━━━━━━━━━━━━━-╮
    ┃ ════════ ● ┃
    ┃ SAMSUNG ┃
    ┃ ┃
    ┃███████████████████████████████████
    ┃█ Missed call from Rhett .:| [█] 17:28 c █┃
    ┃█ ━━━━━━━━━━━━━━━━━━━━━━ █┃
    ┃█ █┃
    ┃█ █┃
    ┃█ █ ████ ██ ██ █┃
    ┃█ ██ █ ██ █ █ █ █ █┃
    ┃█ █ █ █ ██ █┃
    ┃█ █ █ ██ █ █ █ █┃
    ┃█ █ █ ████ ██ █┃
    ┃█ █┃
    ┃█ Sat. 02 Jan. █┃
    ┃█ ━━━━━━━━━━━━━━━━━━━━━━ █┃
    ┃█ █┃
    ┃█ 13°C █┃
    ┃█ 21°|12° █┃
    ┃█ NC | US █┃
    ┃█ Partly cloudy █┃
    ┃█ █┃
    ┃█ █┃
    ┃█ █┃
    ┃█ █┃
    ┃█ █┃
    ┃█ ╭━━╮ ╭━━╮ ╭—(1)╮ ╭━━╮ █┃
    ┃█ ┃ ┃ ┃ █ ┃ ┃ V ┃ ┃ ● ● ┃ █┃
    ┃█ ╰━━╯ ╰━━╯ ╰━━╯ ╰━━╯ █┃
    ┃█ Phone Contacts Messaging Apps █┃
    ┃█ █┃
    ┃█ ━━━━━━━━━━━━━━━━━━━━━━ █┃
    ┃█ ╭━━━━-╮ █┃
    ┃█ ╭-━-╮ ┃ ┃ <━╮ █┃
    ┃█ ┃ == ┃ ╰━━━━╯ ━╯ █┃
    ┃█ █┃
    ┃███████████████████████████████████┃
    ╰━━━━━━━━━━━━━━━━━━━━━━━━-

Leave a Reply

Your email address will not be published. Required fields are marked *

Crazy science experiment at home with water | science experiment /#shorts

#shorts crazy experiment | science experiment | experiment with water. your question ❓ .crazy science experiment with water in hindi .water science experiments at home thanks for watching video 🙏📸 🤗 please subscribe my channel 👋 From samastipur Bihar (Indian) #jitendrarana source

Read More

4 Easy Science Experiments To Do At Home||Randomized Experiments

Hello and welcome back guys in our another youtube video and in todays video i am going to show you some amazing experiments with bottle at home _______________ Materials requiered are_ Bottles Acids diluted Aluminium foil Water Match Clay Savlon Glass bottle Scissors A plate Experiments with bottle Experiments att home Soda vinegar experiments Home […]

Read More

Water Vs ENO +Biscuits || Science Experiment || #Short #Experiment #Trending #Ytshort

Water Vs ENO +Biscuits || Science Experiment || #Short #Experiment #Trending #Ytshort tags battery experiment,battery experiment motor,battery experiments at home,battery experiment mr indian hacker,battery experiment video,battery experiment with coin,battery experiment easy,battery experiment 5 minute crafts,battery experiment light,battery experiment with water,battery experiment at home,battery blabanaeneriment,samar experiment battery kaisebanaen, water experiment,water experiments at home,water experiments 5 minute […]

Read More