Learn the Difference Between Chemical and Physical Changes!
In this informative video, we demonstrate and explain the key differences between chemical and physical changes through exciting experiments like mixing, burning, and blowing up test materials. Perfect for students, teachers, and science enthusiasts, this video makes complex concepts easy to understand with practical demonstrations.
What you'll learn:
How to identify chemical changes
How to recognize physical changes
Real-life examples of both types of changes
Safety tips for experimenting with chemicals and reactions
Join us to explore the fascinating world of science and enhance your understanding of chemical and physical transformations! Don't forget to like, share, and follow for more educational videos.
#ChemicalChanges #PhysicalChanges #ScienceExperiments #EducationalVideo
In this informative video, we demonstrate and explain the key differences between chemical and physical changes through exciting experiments like mixing, burning, and blowing up test materials. Perfect for students, teachers, and science enthusiasts, this video makes complex concepts easy to understand with practical demonstrations.
What you'll learn:
How to identify chemical changes
How to recognize physical changes
Real-life examples of both types of changes
Safety tips for experimenting with chemicals and reactions
Join us to explore the fascinating world of science and enhance your understanding of chemical and physical transformations! Don't forget to like, share, and follow for more educational videos.
#ChemicalChanges #PhysicalChanges #ScienceExperiments #EducationalVideo
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LearningTranscript
00:00Come on, soap!
00:01Can't you come out any faster?
00:03We got a dish deadline.
00:04Hey, Izzy, what's going on?
00:06Me and Bert tried to experiment.
00:08It was a total bust.
00:09Well, don't blame me.
00:10It's not my fault.
00:12I mean, literally, it busted everywhere.
00:13And now I've got to clean up Dr. Jeff's equipment
00:15before he finds out.
00:17How are you going to do that?
00:18I mean, look at all this stuff.
00:20I added hydrogen peroxide with dish soap in this container.
00:23So I'm hoping that by the time I add this catalyst,
00:26it'll cause a reaction, and soap bubbles will go everywhere,
00:29and I can just clean it up at once.
00:31OK.
00:32Well, here goes nothing.
00:45Well, I think that quantifies as tons of bubbles.
00:50Look at this mess.
00:51Hey, Dr. Jeff, I can explain.
00:53We were just-
00:53This is fantastic.
00:56It is?
00:56By combining two substances, you created a reaction,
01:00and that's exactly the lesson I wanted to cover today.
01:03I knew that.
01:03That's why I did it.
01:04Awesome.
01:05I'm Dr. Jeff Vineker, and today we'll explore the science
01:08behind chemical versus physical changes.
01:11But you still got to clean all this up.
01:13Aw, man.
01:15We'll discover the differences between chemical and physical changes
01:18by mixing, burning, and blowing up our test materials.
01:22We'll show that both chemical and physical changes are all around us.
01:27Welcome to Labra-Kazam, where we make science make sense.
01:31So, what do you guys think?
01:32Was Izzy's experiment an example of a chemical change or a physical change?
01:36What exactly is the difference?
01:38Good question, Zoe.
01:39In a chemical change, we form an entirely new substance.
01:42In a physical change, we don't.
01:44So, when we mix things together and a new substance is formed,
01:47it's called a chemical reaction.
01:49Let's break it down.
01:57This is a banana.
01:5812 years of college, ladies and gentlemen.
02:01If I chop this banana into little tiny pieces like this,
02:06is it still a banana?
02:07Did we make a new chemical?
02:08No, that's still a banana.
02:10Which makes it a physical change.
02:12Right.
02:13But what if we turn the banana into a shake?
02:15Next, let's add those berries.
02:19And now, the secret ingredient.
02:25Hot dog.
02:27Well, it is a source of protein.
02:29Go ahead.
02:31So, is this a new substance?
02:38No.
02:39All the ingredients are just mixed together.
02:41So, it's a physical change.
02:42That's right.
02:43Now, it's snack time.
02:46It's all yours, Zoe.
02:49Hey, it's chilly, but it's pretty good.
02:59Physical changes often happen when matter changes states.
03:03This solid spoon is made of a metal called gallium.
03:06Zoe, why don't you take the spoon and stir it into the very hot water?
03:10When you put the spoon into the hot water, it causes it to melt.
03:24Right?
03:25But the shiny liquid at the bottom is still the same metal, so it's not a new substance.
03:31And it's a physical change.
03:32Correct.
03:33It also makes a really good prank.
03:36So, those were physical changes.
03:50A chemical change is different.
03:52It forms entirely new substances.
03:54Hey Bert, do you have those chocolate candies?
03:56Those were for an experiment.
03:58I thought they were for dessert.
04:01Okay.
04:02How about that salt water taffy?
04:03Those were for an experiment, too?
04:04Is there any candy you didn't eat?
04:06Yes, this gummy candy got stuck to my arm.
04:29This gummy candy is made of sugar.
04:32see what happens when we toss it into this tube of oxidizer. That's a chemical
04:36that provides a lot of oxygen to help things burn. Don't try this at home!
04:43Here we go!
05:02Now that's a chemical reaction! The gummy candy burned up, forming entirely new chemicals,
05:08like this carbon. Gummy candy?
05:11Oh, no thanks. I'm actually pretty full from that hot dog shake.
05:15Yes, please!
05:17Now it's time to put our new knowledge of chemical versus physical changes to the test.
05:22This first one is a classic, but with a twist.
05:25Twist! Get it!
05:33No!
05:34Anyway, we're going to need a drinking glass. Zoe, could you get one please?
05:38No problem.
05:39For this science trick, you're going to need a bottle of soda, mentos, fishing line, and scissors.
05:46First, you're going to poke a hole in the center of the mentos and tie fishing line around it.
05:50Open up the bottle and lower it in, but don't drop it in.
05:54Now just put on the cap to hide the mentos.
05:57And lastly, cut the evidence. Presto!
06:00Oh my gosh, I can't wait to see the look on her face!
06:03Don't try us at home, or near any electronics.
06:06Here you go.
06:07Thanks, Zoe. Could you pour a glass of soda, please?
06:11That's it?
06:13Really, Doc? Your experiments are starting to get a little bit...
06:19This is everything I dreamed of!
06:25Don't worry, Zoe. You're not the only one that fell for it.
06:28Jeffery! I said no more science pranks of this house!
06:43So, was the foaming effect caused by a chemical change or a physical change?
06:49Well, when you add the candy to the soda, it created a gas, so I say chemical change.
06:54I think the gas is already trapped inside the soda, so when it's released, it's not a new substance.
06:59I say physical change.
07:00Let's take a closer look.
07:02I'm going to take a balloon and put the candy inside like this.
07:06Then, I will put the balloon on top and allow the two to mix.
07:17If the gas we're collecting now is also carbon dioxide, then we did not make a new substance.
07:25I'll release this gas into this container.
07:31Hey, Izzy! Please light these candles for us.
07:38Carbon dioxide gas is heavier than air.
07:41So, if you were to pour it onto lit candles, it would displace the air and the candles would have no oxygen.
07:47So, they would go out.
07:48So, Zoe, why don't you take this pitcher of gas and carefully pour it here on top of the candles.
07:54I never knew you could pour gas. You can't even see!
08:00Whoa! So, that means it really was carbon dioxide.
08:11Labrakazam!
08:13Combining soda and the candy released carbon dioxide gas, but the gas was already in the soda.
08:20That means it's not a new substance. It's a physical change.
08:24Don't try this at home!
08:27Let's try another one. This time, we're going to use this yellow liquid and this zinc metal.
08:34I'm simply going to take some of the metal and pour it inside.
08:40What do you think is happening?
08:42Well, this must be a chemical reaction because there wasn't any gas. There's a lot now.
08:47But maybe the liquid's just boiling, which will make it a physical change.
08:51Both good theories. Let's try it out with a flame test.
08:55For that, you will need a flame.
08:59If this gas is carbon dioxide, it will extinguish this flame.
09:02If it is hydrogen, it'll make a little pop because it's flammable.
09:06And if it's oxygen, this flame will burn brighter.
09:10Let's try it out. I'm going to collect some of the gas like this.
09:13And once it's full, I'll bring it close to the flame.
09:20It's hydrogen.
09:25Hydrogen. A flammable gas less dense than air, often identified by the characteristic pop when it is burned in a flame test.
09:32So we made a new substance. This is a chemical reaction.
09:37Labrakazam. This is a more exciting way to verify this, but we're going to need a lot more gas.
09:43Back to the safety zone.
09:45Don't try this at home.
09:48I'm going to create soap bubbles of hydrogen gas using the hydrogen gas in this balloon and soapy water.
09:55Don't try this at home. Here we go.
09:59Izzy, I know you love bubbles, so hold up that tray and I'm going to put a lot of bubbles in it.
10:08You got it.
10:11There.
10:12All right, Zoe, you're going to light it on fire.
10:15Three, two, one.
10:21Labrakazam!
10:22That was awesome!
10:24Can I be an excuse to go to the restroom, please?
10:26Our test confirms it's hydrogen.
10:28Chemical and physical changes happen to us and around us every day.
10:33To check out some more examples, let's cut to some real world science.
10:43Here I'm whipping up egg whites to make frosting.
10:45Since I'm just mixing them with air, it's a physical change.
10:50When making toast, intense heat causes the bread to burn, which means chemical change.
10:55Hot chemical change.
10:56When you turn on a light bulb, the filament glows because it gets very hot.
11:07But no new substance is being formed.
11:09Physical change.
11:10Physical change.
11:11Ah!
11:12Ah!
11:13Ah!
11:14Spoiled milk!
11:15The sugars in milk called lactose are converted into lactic acid by microbes, making it sour and barfy.
11:32Chemical change.
11:33Now let's check in with Zoe with some do-it-yourself.
11:35This expired in 2012?
11:36What?
11:37Today I'm going to show you how to create a secret message using a chemical change.
11:39You will need q-tips, baking soda, a cup of water, a measuring spoon, a regular piece of paper, and blackberries.
11:49Start by mixing two spoonfuls of baking soda into one cup of water.
11:54Give that a nice stir for about 15 seconds.
11:55It's okay if all the baking soda doesn't dissolve.
11:56Next, take your q-tip and dip it into the liquid.
11:57Dab it off on the side of the liquid.
11:58You will need q-tips, baking soda, a cup of water, a measuring spoon, a regular piece of
12:01paper, and blackberries.
12:02Start by mixing two spoonfuls of baking soda into one cup of water.
12:07Give that a nice stir for about 15 seconds.
12:12It's okay if all the baking soda doesn't dissolve.
12:17Next, take your q-tip and dip it into the liquid.
12:22Dab it off on the side of the glass and write a simple message in the middle of the paper.
12:30Then let it dry for about 10 minutes.
12:33It looks like there's nothing there, but when the water evaporated, it left streaks of baking soda crystals on the paper.
12:39The baking soda crystals are white, just like the paper, so you can't see it.
12:43To reveal the secret message, we'll use a chemical reaction.
12:46That's where the blackberries come in.
12:48Carefully rub the berry onto the paper.
12:51As the juices come out, smudge them across your entire message.
12:58Labrakazam!
12:59The secret message is revealed thanks to the chemical reaction between the purple pigment in the blackberry and the baking soda.
13:06The reaction forms a new substance that's blue.
13:09The change only happens when the two chemicals are mixed together.
13:12Do you think this would work with any other fruits?
13:14What if you replace the baking soda with something like salt or sugar?
13:17Try it yourself!
13:19Now, let's review!
13:21Today, we learned that in a chemical change, we form entirely new substances.
13:27And in a physical change, we don't form a new substance.
13:31Physical changes also occur when matter changes states between solid, liquid, and gas.
13:37Great lessons today, Dr. Jeff!
13:41You look like you could use a refreshment.
13:43Oh, thanks, guys!
13:44Nothing sounds better than a nice, hot cup of...
13:46Oh, guys!
13:49And the prankster's finally been pranked!
13:52Yeah, I deserve that.
13:53Join us next time on Labrakazam!
13:55I'm Dr. Jeff!
13:56I'm Izzy!
13:57I'm Zoe!
13:58I'm Bert!
13:59And remember...
14:00Always question, always wonder!
14:04...
14:14...
14:15...
14:16...
14:17...
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