Kw-logo-smaller

Science Project: How to Make Homemade Ice Cream

Jan 16, 2014

As warmer spring comes rolling in you might be thinking more and more about cooler sweets to eat, namely ice cream. Or maybe you think about ice cream all the time, no matter what the temperature. Regardless, ice cream is definitely one of the most delicious treats you can have, but did you know you don’t only have to buy it at the store? You can make it yourself!

Ice Cream is also a wonderful demonstration of what salt can do to ice. This is when we get science-y.  Hope you’re prepared!

Water has three states: solid, liquid and gas. Water changes into its solid state when it reaches 0 degrees Celsius (32 degrees Fahrenheit), but if there is Sodium Chloride (NaCl) present, otherwise known as salt, then that temperature drops. That’s because salt lowers water’s freezing point. Have you ever noticed how when the sidewalk is icy they put salt on it to melt the ice and make it safer for walking? That’s the same principle. The salt they put on the sidewalk mixes with the ice and because it's freezing point is lower than the temperature of the unsalted ice, the sidewalk melts.

When you're making ice cream the lower temperature of the ice and salt mixture, which surrounds the cream and sugar mixture, is cold enough to change the state of the cream from a liquid to a solid, hence the name ice cream! So let's get started!

Materials

  • 1/2 cup milk
  • 1/2 cup whipping cream  or heavy cream
  • 1/4 cup white sugar
  • 1/4 teaspoon vanilla extract
  • 1/2 to 3/4 cup sodium chloride (NaCl) aka table salt or rock salt
  • 2 cups ice
  • 1-quart Ziploc bag
  • 1-gallon Ziploc bag
  • Thermometer
  • Measuring cups and spoons
  • Bowls, cups, spoons or cones to serve your ice cream treat

Procedure

  1. Add 1/4 cup sugar, 1/2 cup milk, 1/2 cup cream, and 1/4 teaspoon vanilla to the quart Ziploc bag. Zip that bag up so nothing leaks!
  2. Put the 2 cups of ice into the gallon Ziploc bag.
  3. Use the thermometer to measure the temperature of the ice in the gallon Ziploc bag. Make sure to record this number so you can record
  4. Add 1/2 to 3/4 cup salt (sodium chloride) to the gallon Ziploc bag of ice.
  5. Place the sealed quart bag inside the gallon bag of ice and salt. Seal the gallon bag securely.
  6. Rock the gallon bag from side to side. Hold it at the seal so that the cold ice doesn’t freeze your hands instead of your ice cream. You can also use gloves or a cloth to protect your hands, just remember it will be colder than 0 degrees Celsius!
  7. Continue to rock the bag for 10-15 minutes or until the contents of the quart bag have solidified, or until you can’t wait for ice cream anymore.
  8. Open the gallon bag and use the thermometer to measure and record the temperature of the ice and salt mixture. Notice how much colder it is than the ice on its own.
  9. In bowls or cones serve and most importantly enjoy your homemade ice cream!

Toppings

There’s always the possibility to add all different types of toppings: chocolate sauce, sprinkles, caramel, strawberries, chocolate chips! Feel free to add these ingredients to the quart bag before you mix everything, but know that your mixture will turn to ice cream much faster if you hold these special treats and add them as toppings.

Ice Cream Maker

This is a very easy way to make some delicious ice cream! If you are interested in making your own homemade ice cream all the time you may want to look into an ice cream maker. It still uses the ice and salt mixture to freeze the cream it just provides an easier and higher volume way to make ice cream at home.

Have Your Say!

What’s your favorite ice cream flavor? Share it with us in our comments section below.

Related Articles:

 

99 Comments

latest videos

F1154466813265

Where Was Ice Cream Invented?

  • United States.
  • France.
  • China.
  • Iceland.

related stories

Micro_rock-candy-micro
Did you know crystals aren't just for decoration? If you need some science fair project inspirati...
We all scream for ice cream! Who doesn’t love this yummy, creamy, cool and delicious summer treat...
Have a ball making tasty homemade ice cream in 20 minutes with the Play and Freeze Ice ...
Healthy eating is important, but it's not always easy to know which foods to eat and which foods ...

Random in the forums

-Gwen9--
-Gwen9-- posted in General:
-Karpov-, Boysrock50:You two are right! You should post helpful tips to help get over depression.
reply about 1 hour
-Gwen9--
-Gwen9-- posted in Say Anything:
White
reply about 1 hour
-Gwen9--
-Gwen9-- posted in Say Anything:
HennesseY (its a car)
reply about 1 hour
Paw-
Paw- posted in Say Anything:
DemolisH
reply about 2 hours
urifour11
(So i just started this story today and i spent a good amount of time on it. Here it is and it's long. It's bad too. Forgive me.)             I am a woman. Some call me a little girl. But I am 15 years of age. I have survived my whole life down in the tank with no family other than the other woman that accompanies me. I don’t know where they are. I only know that my mother is dead. That she killed herself. Because she couldn’t stand the tank, a place with rust growing on the steel metal walls, a place where the only comfort you get is in #### #### on the cold metal floor. A place where my mother had died, a place I call home. It’s where all the woman of the United States lives now. The president declared a new law that woman where of no use except for reproduction, just when I was a baby.         They usually killed the child if it was a girl. But a few are chosen to live in the tank for the circumstances needed. My mother said she would never love another man other than my father. The day they killed him right in front of her was the day she joined him in heaven. I don’t know where my brothers are, probably living the luxury of being a man. Which is very unfair but, I hope their okay. Now my family is Shira and Gretna. Shira is my age and she is practically my sister. Gretna is the oldest woman in the tank and everybody respects her. Some call her big mama. She sure was big but, I prefer to call her Gretna. She was beautiful though. He dark skin made her eyes look dazzling. I’m pretty sure before all her hair got cut of it was long and curly. Everyone’s hair was cut off in the tank. Mine was at its fullest peek. My bangs grew in and it flowed down from their into a short v at my neck. Was it a Pixie cut they used to call it? Everyone’s hair got shaved every four years. Shiras hair grew fast and it stopped at her chin in a short line. It was a pale blond, almost white.          Every morning I wake up I start to hum a melody. My mother had sung a song to me at night. Now I sing it in the morning. Everyone else joins in to after the first verse Hear the birds crow, feel the sun rays, watch the trees grow, sing on rainy days. Then soon as I walk out of my cell everyone starts humming and some sing alone with me. It’s a ritual for my mother. When I first started singing it everyone was afraid they would get whipped or beaten. But the guards didn’t seem to mind. In fact, I’m willing to bet they enjoy it. The second verse is even prettier See the blue skies, feel the breeze, watch the leaves fly, sing the melody. I always sing it to myself at night, alone. It makes feel better like I might, just might, go above ground and see the world. Look at the stars, and close your eyes, imagine you will go far, and sing good night. That was the end of the song and by the time it ends everybody is eating.        They barley give us enough food. It’s a pain to see the parents giving up their food to the children. Sometimes I give food from mine to the small children and the elderly. Today it was just beans and bread. I gave my bread to Gretna, she looked like she needed it. “Honey, you really didn’t have to. I should be giving you my food.” I shook my head upset by the idea of that. “Gretna, honestly you need it. If you passed away I don’t know what I would do. Nobody would know what to do.” Her face softened and that sweet smile of hers formed onto her face. “Mira, I’m an old woman. I can’t do anything really. I’m useless. What do you need me for?” Just as I was about to answer a plate plopped down next to me. Shira sat down a frown plastered on her face. “That’s what all the men are saying is. Their opinion is bias, wrong, despicable, stupid, and irrational, so therefore saying. We defiantly need you big mama.” Gretna grinned and said “You girls are too sweet to me.”       After breakfast we all move towards the work area. We all just clean dishes, wash clothes, mop floors. Men thought this is what woman should do. It completely broke my heart. There were smart intelligent woman here. All of them had a good heart. Not one complaint. I’m not saying all men are bad. There are defiantly good ones. But it’s just the council. I don’t know why they think that this is okay. All of this is not okay. Nothing is. My job is mainly clean dishes. Sometimes I help Allie and Wanda with their washing. They aren’t strong enough to carry their load. The guards don’t mind. After the huge switch, the new guards are much nicer. It’s been more peaceful. As I finish washing my last dish I scan the room looking at all the others. It’s weird when I spot a guard staring at me. He looked away quickly and I frowned. I walked over to Shira and whispered in her ear “Creepy guard was staring at me. Can you come with me to get more dishes?” Shira knew that this was important. I saw it in her eyes. Before the switch of guards some had taken advantage of the woman here. Hearing about it made me terrified for the weaker ones, also for me. Shira put her mop in a corner and we started making our way toward the eating area. The walls where dark brown and covered in dust. There where railings along the walk way so we wouldn’t fall.            The work room was high above the eating area and a thin staircase descended down. The eating area was right in the middle. All the cell’s squared around it and it kept going like that upward. Me and Shira went toward the dirty dish table and picked up a few. “Thank you.” I said to her. The load looked heavy. She gave me a smile. As I turned around the guard staring at me earlier was right there. My eyes went wide and I stared back. Shira saw and she stared at the guard eye’s narrowed. He looked young, maybe 18. His hair was a light brown color and he had a strong build. He had a scar across his cheek and you could see his mussels poking out of his uniform.  He could defiantly hurt me. “Please. Don’t come any closer.” I said still staring. “I won’t.” his voice was low and clear. He could be as loud as he wanted and you could still hear him through the whole tank. “What do you want…sir” Shira said. It seemed like it was a pain for her to add in sir. It was for me too. “Please, call me Austin. I…I just wanted to check on you girls.” He looked at me and his stare softened “Your name is Mira, right?” I blinked a bit shocked. The guards never took any time to remember our name. They mostly called us you or Tyrant. I gulped down my nerves and said “Yes.” Clearly. Austin looked close to tears and asked “And your mother?”          I froze. “She’s dead.” I said as quick as I could. I was surprised that barely escaped my mouth. His face dropped and a frown replaced his smile. “Mira. I’m….I’m sorry to hear that.” I narrowed my eyes confused. “It’s alright. Why are you asking me these questions?” He paused. He blinked, then finally said “Just curious.”  I  looked over at Shira and she was just as curious as I was. “We should go.” Shira said and I nodded. I gave Austin a small smile as we walked past him and he smiled back. Once we were up the stairs and out of eye shot Shira stared at me. “Do you know who he is?” I gave a simple shake of the head. Shira looked ahead her eyes narrowed. “We should ask big mama.” I smiled and said “Yes. Good idea.” I looked at Shira and saw the sly smile on her face. “Although, He was cute.” I laughed at her and said “You think every guard here is cute.” Shira smiled too and said “Is that a bad thing? Being surround by tons of handsome young men? I mean at our age we could devour them up.” I almost smacked her on the arm, but I realized I had a big thing of dishes in my arms. Once we arrived at the work area I put my dishes at my sink and rushes up to Gretna. Shira followed knowing what I was thinking. “Gretna.” I said. She turned from her laundry mode and looked at us. “Where have you been? Now you got twice the work held out for ya!”         I wrinkled my nose knowing she was right and said “Fine. I’ll tell you about it in the showers.” Gretna raised an eyebrow and said “I hope I don’t see a dead body with the way you two look.” Shira laughed and I joined in.                                                                   *****         “So, he just asked you a bunch of questions?” Gretna said with a towel around her. Me and Shira just finished and we were in the clothes that were just washed from work hour. Shira nodded vigorously. “It was weird.” “He asked about my mom too.” I piped in. Gretna cocked her head back staring at us. “He seemed sad when I told him she was dead.” I said adding on. “Ignore it.” Gretna said quickly. I looked at her like she had two heads “Why?” Shira looked confused as well. This was not Gretna. “Nothing comes good with guards asking questions. Now go, let me shower in peace.” I looked at her hurt. Why wouldn’t she help me on this one? Why was she so dismissive? I heaved in a breath and left. The hot air was getting sticky on my clothes. I was not going to ignore it. I wanted to know, I needed to know.       I peeked outside looking for Austin. I couldn’t see his brown hair anywhere. So I walked out and rounded the corner. I heard a voice that was surely his, loud and deep. “Jason. It’s true. She’s dead.” Jason? Who’s Jason? “No. I…this is…” I'm assuming Jason was talking now. “Awful?” Austin finished. I didn’t understand. Were they talking about my mother? I was pretty sure they were. When I leaned over closer I felt a jab at my collar and I was tripped back. “What is wrong with you child! I told you to ignore it!” The two soldiers rounded the corner with their hands at their holsters. Their step was in union. They looked angry that someone was listening in on their conversation. Of course they were. Once they saw Gretna they calmed and looked at me. Austin sucked in a breath and Jason offered a hand to help me up. But so did Gretna. With how cross I was I got up on my own staring at them.            Gretna interfered and said “Sorry about that gentleman. I’ll take care of her and teach her…” She grabbed my arm and said right in my ear firm and scary “that it’s not polite to snoop.” A snap reaction made me do something I thought I would never do “Tell that to Austin.” I said my voice fowl. I expected a swat at the face or a firm yelling. But Austin replied “Sorry.” He looked at Gretna with a pleading look. All she did was shake her head. I threw my arm out of Gretna hold and gave all of them a look. I started to walk away and I saw that Jason kid was in tears.    (That's it! I'm still working on it.)
reply about 2 hours

play online games