Read the excerpt from "The Storyteller."
The smaller girl created a diversion by beginning to recite "On the Road to Mandalay." She only knew the first line, but she put her limited knowledge to the fullest possible use. She repeated the line over and over again in a dreamy but resolute and very audible voice; it seemed to the bachelor as though some one had had a bet with her that she could not repeat the line aloud two thousand times without stopping. Whoever it was who had made the wager was likely to lose his bet.
"Come over here and listen to a story," said the aunt, when the bachelor had looked twice at her and once at the communication cord.
The children moved listlessly towards the aunt's end of the carriage. Evidently her reputation as a storyteller did not rank high in their estimation.
In a low, confidential voice, interrupted at frequent intervals by loud, petulant questionings from her listeners, she began an unenterprising and deplorably uninteresting story about a little girl who was good, and made friends with every one on account of her goodness, and was finally saved from a mad bull by a number of rescuers who admired her moral character.
Which instances of situational irony occur in the passage? Select two options.
SCIENCE — Physical Science
Have You Ever Wondered...
- Why does ice float in water?
- At what temperature does water reach its maximum density?
- Are liquids or solids typically denser?
Today’s Wonder of the Day was inspired by Tianna.
Tianna Wonders, “why do icecubes float in water?” Thanks for WONDERing with us, Tianna! When you've been playing outside all afternoon, there's nothing better than
relaxing at the kitchen table with a tall glass of ice
water. There's something satisfying about the
clink of the ice cubes as they hit the bottom of the glass. As you pour water over them, they
hiss and crackle a bit as they slowly
float to the top of the glass. Have you ever thought about what a curious
concoction ice water is? It's
literally solid water floating in liquid water. How cool is that? (Pun totally intended.) But why does the ice float in water? Scientists will tell you it has to do with
density, which is a measure of mass per
unit of volume.
Ice floats because it is less dense than the water. Something denser than water, like a rock, will sink to the bottom. To be able to float, an object must displace fluid with a weight equal to its own weight. The
fact that ice floats in water is a bit strange, because most substances are denser when they're solids. Water, however, reaches its
maximum density at 40º F (4.4º C). As water cools and freezes, it becomes less dense due to
the unique nature of hydrogen bonds.
Each molecule of water consists of one oxygen atom strongly bonded to two hydrogen atoms with covalent bonds. This fact is reflected in the chemical formula for water: H2O.
Water molecules tend to be attracted to each other by weaker hydrogen bonds. These form between the positively-charged hydrogen atoms and negatively-charged oxygen atoms in nearby water molecules.
As water temperature decreases, the weaker hydrogen bonds begin to hold the negatively-charged oxygen atoms apart, forming a rigid crystal honeycomb structure we call ice. The water molecules in ice take up about 9% more space than liquid water, which means ice is about 9% less dense than water.
If you have a gallon of ice and a gallon of water, the gallon of ice will weigh less than the gallon of water. When you put the ice into the water, the denser water pushes the ice to the top where it will float.
This unique property of water is especially beneficial for fish that live in bodies of water that freeze in the winter. Because ice floats, bodies of water freeze from top to bottom. This allows fish to survive deep underwater even when the surface freezes!
Wonder What's Next?
We believe you’ll think tomorrow’s Wonder of the Day is out of this world!
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