Ice
in sentence
1200 examples of Ice in a sentence
It's composed entirely of
ice
crystals cascading from the upper reaches of the troposphere, and as these
ice
crystals fall, they pass through different layers with different winds and they speed up and slow down, giving the cloud these brush-stroked appearances, these brush-stroke forms known as fall streaks.
This is when a layer is made up of very, very cold water droplets, and in one region they start to freeze, and this freezing sets off a chain reaction which spreads outwards with the
ice
crystals cascading and falling down below, giving the appearance of jellyfish tendrils down below.
A colleague of mine was recording in the American Midwest around this pond that had been formed maybe 16,000 years ago at the end of the last
ice
age.
Our first study planted a false memory that you got sick as a child eating certain foods: hard-boiled eggs, dill pickles, strawberry
ice
cream.
It was something very similar to the phase transition that occurs when water turns into
ice
below zero degrees.
But we're already starting to get video and photos back from all over the world, including this shot from under the
ice
in Antarctica.
But the caves I want to share with you today are made completely of ice, specifically glacier
ice
that's formed in the side of the tallest mountain in the state of Oregon, called Mount Hood.
Well, those of you who have ever seen or touched snow, you know that it's really light, because it's just a bunch of tiny
ice
crystals clumped together, and it's mostly air.
Well, on a mountain like Hood, where it snows over 20 feet a year, it crushes the air out of it and gradually forms it into hard blue
ice.
Now each year, more and more
ice
stacks up on top of it, and eventually it gets so heavy that it starts to slide down the mountain under its own weight, forming a slow-moving river of
ice.
When
ice
packed like that starts to move, we call it a glacier, and we give it a name.
Now each year, as new snow lands on the glacier, it melts in the summer sun, and it forms little rivers of water on the flow along the ice, and they start to melt and bore their way down through the glacier, forming big networks of caves, sometimes going all the way down to the underlying bedrock.
Warm water from the top of the
ice
is boring its way down, and warm air from below the mountain actually rises up, gets into the cave, and melts the ceilings back taller and taller.
But the weirdest thing about glacier caves is that the entire cave is moving, because it's formed inside a block of
ice
the size of a small city that's slowly sliding down the mountain.
So in July of that year, we went out on the glacier, and we found a big crack in the
ice.
We had to build snow and
ice
anchors so that we could tie off ropes and rappel down into the hole.
At the end of this hole, we found a huge tunnel going right up the mountain underneath thousands of tons of glacier
ice.
The inside of it was coated with ice, so we had to wear big spikes on our feet called crampons so we could walk around without slipping.
The
ice
in the ceiling was glowing blue anad green because the sunlight from far above was shining through the
ice
and lighting it all up.
So besides really cool ice, what else is inside these caves?
There's weird bacteria living in the water that actually eat and digest rocks to make their own food to live under this
ice.
In fact, this past summer, scientists collected samples of water and
ice
specifically to see if things called extremophiles, tiny lifeforms that are evolved to live in completely hostile conditions, might be living under the ice, kind of like what they hope to find on the polar icecaps of Mars someday.
Another really cool things is that, as seeds and birds land on the surface of the glacier and die, they get buried in the snow and gradually become part of the glacier, sinking deeper and deeper into the
ice.
As these caves form and melt their way up into the ice, they make these artifacts rain down from the ceiling and fall onto the cave floor, where we end up finding them.
It's been frozen in the
ice
for over 100 years, and it's just now starting to sprout.
This duck died on the surface of the glacier long, long ago, and its feathers have finally made it down through over 100 feet of
ice
before falling inside the cave.
And a small indulgence, like eating one scoop of
ice
cream, is more likely to lead to a food binge in controlled eaters.
Here's some data from actually just 10 days ago, which shows this year's minimum of the Arctic Sea ice, and it's the lowest by far.
And the rate at which the Arctic Sea
ice
is going away is a lot quicker than models.
I spent time skiing across the sea
ice
for weeks at a time in the high Arctic.
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