ClassX Video Lessons Youtube Channel Learning Junction Melting and Boiling – Boiling Point and Melting Point – Learning Junction
Hello friends! Today, we’re going to explore the exciting world of melting and boiling. Have you ever boiled water to make pasta? When you do, you need to heat the water until bubbles rise from the bottom of the pan to the top. That’s called boiling!
Oh, and remember the ice cream I brought for you? It’s melting because it’s too warm outside. Let’s dive into what melting and boiling are all about, but first, let’s understand what solids, liquids, and gases are.
Solids: In this state, particles are packed tightly together, so they don’t move much. Think of a rock or a block of ice.
Liquids: In a liquid state, particles are more loosely packed and can flow around each other, like water or juice.
Gases: In this state, particles have lots of space between them and move around quickly, like the air we breathe.
Now, let’s learn more about melting and boiling!
Melting is when something changes from a solid to a liquid. Imagine you have a chocolate bar, and you leave it in the sun. It starts to melt! That’s because the heat makes the chocolate change from solid to liquid.
Here’s another example: when you light a candle, the heat from the flame melts the wax near the wick. Over time, the wax turns into a liquid.
When you heat a solid, it starts to melt. The temperature at which this happens is called the melting point. For example, butter melts at about 90°F, ice melts at 32°F, and dark chocolate melts at around 113°F.
Boiling is when a liquid turns into a gas, forming bubbles. When you boil water for pasta, you see bubbles rising to the surface. That’s the water turning into steam!
For example, when milk boils, bubbles form around the edges of the pot. These bubbles rise and become steam. The temperature at which this happens is called the boiling point. Water boils at 212°F, and cow’s milk boils at about 203°F.
Melting is when a solid turns into a liquid, like chocolate melting in the sun. Boiling is when a liquid turns into a gas, like water turning into steam when you make pasta.
Now you know all about melting and boiling! Keep exploring and learning more about the world around you. Bye-bye!
Ice Cube Observation: Take a few ice cubes and place them in a bowl. Watch them over time and note what happens as they melt. Discuss with a friend or family member why the ice cubes are turning into water. Can you think of other things that melt? Try to find examples around your home.
Boiling Experiment: With the help of an adult, boil some water in a pot. Watch the bubbles form and rise to the surface. What do you notice about the steam? Can you see it? Feel the steam (safely, from a distance) and describe what it feels like. Talk about why the water is turning into steam and where the steam goes.
Melting and Boiling Hunt: Go on a hunt around your house or outside to find examples of melting and boiling. Can you find something that is melting, like butter on warm toast? Or something that is boiling, like a pot of soup on the stove? Draw pictures of what you find and share them with your class or family.
**Sanitized Transcript:**
Hello friends! Today we’ll learn about melting and boiling. Are you boiling water in the pan to make pasta? You need to bring water to a rolling boil until bubbles come from the bottom of the pan to the top.
Ah, I forgot to give you the ice cream I brought for you; it’s melting because it’s exposed to a temperature above its freezing point.
Today we’ll learn about melting and boiling, but before that, let’s quickly see what solids, liquids, and gases are.
**Solids:** In this state, particles are tightly packed together, so they don’t move much.
**Liquids:** In a liquid state, the particles are more loosely packed and can flow around each other.
**Gases:** In this state, the particles have a great deal of space between them and have very high kinetic energy.
To know more about this, watch our video on the states of matter.
Now let’s learn about melting. Melting is a physical process of changing something from a solid into a liquid. For example, you have melted chocolate. Could you light the candle, please? The light and heat from a candle come from the wax burning. The heat of the flame melts the wax near the wick. Wait for a few hours, and it will melt completely.
It’s good that melted wax can be cleaned with ice cubes, as ice causes wax to harden and shrink. Look carefully; the motion of the molecules inside the ice is increasing. Ice has also melted and is now in liquid form.
When you apply heat to a solid substance, it starts to melt. For example, butter starts to melt after heating it. The temperature at which something begins to melt is known as the melting point. The melting point of butter is around 90°F, pure ice melts at 32°F, and the melting point of dark chocolate is around 113°F.
Now, let’s learn about boiling. Boiling happens when a liquid becomes a gas, forming bubbles inside the liquid. You’ve prepared yummy pasta and boiling water along with the veggies.
See, milk is boiling here now, with bubbles forming around the edges of the pot. In just a few moments, it’s time to turn off the heat as the milk is boiling. These bubbles rise to the surface and turn into steam, known as vapor. The temperature that is high enough to cause this activity is called the boiling point. The boiling point of water is 212°F, and the boiling point of cow’s milk is about 203°F.
You’re now enjoying your boiling hot coffee with melted butter sandwich.
Let’s recap: melting is the process by which a solid turns into a liquid, and boiling is the process by which a liquid turns into a vapor.
Now you know a lot about the topic! Stay tuned for more videos. Bye-bye!
