Here are 5 Cool Facts About Ice Cream (students will learn in the informational text):
1. Long before modern refrigeration and freezers, around 200 BC, the
Chinese enjoyed a frozen mixture of milk and rice sweetened with syrup. It was
made frozen by pouring snow mixed with an ancient salt over the ingredients.
Roman Emperors have been known to have snow retrieved from mountaintops in order
to create the finest chilled delicacies. The Ancient Greeks, around the year
400 AD, ate snow mixed with honey and fruit in Athens.
2. Scientifically, ice cream is a complex substance that you
would never find in nature. In order
to create a smooth, creamy concoction and then freeze it in place, you must use
a special technique. You must whip together and freeze the ingredients all at
the same time in order to create and suspend the most
important ingredient – air bubbles! Under normal
circumstances, if you simply mixed the ingredients in ice cream together, they
would quickly separate apart. The fat globules from the milk would rather stick
together than be spread out among ice crystals, air bubbles, sweeteners, and
flavorings. To truly make it an emulsion, a mixture
of liquids in which one liquid is scattered throughout the other but is not
dissolved, you can whip up the ingredients to really spread them out.
3. In addition
to being an emulsion, ice cream is also considered a foam. A foam is a light
mass of fine bubbles formed in liquid. When the ingredients in ice cream are
whipped together, air bubbles get beaten into the mixture. Often in an ice
cream maker, a blade will continuously move throughout the mixture to aerate
it, or move air through it. Air makes up between a third and a half of the
total volume of ice cream!
4. One key to freezing
this foamy emulsion – whether in an ice cream maker or in a plastic baggie – is
to freeze it quickly so that the liquid ingredients turn into ice crystals and
“trap” all the other ingredients and air bubbles in place. While the
ingredients are being whipped together, the liquids will only turn into ice
crystals if they are cooled with something that is even colder than ice. That
is why rock salt is added to the ice that surrounds the barrel in ice cream
machines or in the baggie of ice you can use to make ice cream yourself at
home.
5. Adding salt to ice artificially lowers the freezing point of water. This
is called freezing-point depression. The discovery of this principle was a real
game-changer in the history of ice cream making. Before this, people had to
make do with mixing ingredients with snow and ice to make a chilled delicacy.
But once people discovered how to lower the freezing point of liquids (by
adding rock salt to ice), they could not only chill their mixture – they could
freeze it. And that is how we got ice cream!
In addition to summarizing central ideas, writing to explain the scientific procedure of how ice cream is made, writing a narrative about an ice cream incident, learning scientific vocabulary, citing evidence, getting the recipe for homemade ice cream in a baggie, and even doing a fun Mad Lib activity about ice cream, students fill out this graphic organizer in the lesson:
And, check out this COOL and FREE logic puzzle! It takes about 15 minutes of critical thinking, so it would be a good bellringer or free-time activity in any subject. For grades 4-9 more or less.
Want more engaging nonfiction reading for your students? Want to have them practice ALL 10 Reading Informational Text Skills? Students keep reporting how much they LOVE the high-interest passages. Teachers keep reporting how much time and hassle they are saving by not having to search for articles for every standards for hours. TRY BOTH VOLUMES TODAY:
I MADE THIS COOL TEXT & TASKS FREE FOR THE SUMMER!!! SO GRAB YOURS TODAY!
In my FUN-YET-EDUCATIONAL reading informational text and tasks lesson that gets students to meet several standards for Reading in Science & Technical Subjects plus Writing, while also having fun learning all about the science behind ice cream (and the procedure for making their own ice cream), they learn all this and more!
You might also like these FREE items in the series:
In my FUN-YET-EDUCATIONAL reading informational text and tasks lesson that gets students to meet several standards for Reading in Science & Technical Subjects plus Writing, while also having fun learning all about the science behind ice cream (and the procedure for making their own ice cream), they learn all this and more!
You might also like these FREE items in the series:
In addition to summarizing central ideas, writing to explain the scientific procedure of how ice cream is made, writing a narrative about an ice cream incident, learning scientific vocabulary, citing evidence, getting the recipe for homemade ice cream in a baggie, and even doing a fun Mad Lib activity about ice cream, students fill out this graphic organizer in the lesson:
And, check out this COOL and FREE logic puzzle! It takes about 15 minutes of critical thinking, so it would be a good bellringer or free-time activity in any subject. For grades 4-9 more or less.
Want more engaging nonfiction reading for your students? Want to have them practice ALL 10 Reading Informational Text Skills? Students keep reporting how much they LOVE the high-interest passages. Teachers keep reporting how much time and hassle they are saving by not having to search for articles for every standards for hours. TRY BOTH VOLUMES TODAY:
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