Table of Contents
- 1 Why do ponds freeze from top to bottom instead of bottom up?
- 2 Why do lakes freeze from the top what is the warmest possible temperature at the bottom of a frozen lake?
- 3 Do natural springs freeze?
- 4 Why does ice freeze upwards?
- 5 Why does bottom of lake not freeze?
- 6 Why are mountains not hot?
- 7 At what temperature will flowing water freeze?
- 8 What is the difference between a seep and a spring?
- 9 Why does freezing start from the top and not the bottom?
- 10 Why don’t lakes freeze from the bottom up?
- 11 What is it called when the ground freezes 2 years in a row?
The reason water freezes from the top down is because, unlike almost everything else, water gets less dense when it freezes. When most things freeze they get more dense, the molecules are able to pack more closely together because they start to move more slowly as they cool, making them more dense. Water is different.
Remember, water is most dense at 4 degrees Celsius. It becomes less dense above and below this temperature. If water were most dense as a solid, lakes would freeze from the bottom up, eventually freezing solid. In that case, little or nothing would survive in the lake.
Why are mountaintops cold?
As air rises, the pressure decreases. It is this lower pressure at higher altitudes that causes the temperature to be colder on top of a mountain than at sea level.
Do natural springs freeze?
Actually, the spring itself probably won’t ever ice up on you — it’s bringing up moving, underground water. It’s those pipes that’ll freeze. So bury all your waterlines good and deep, below your area’s frost line.
Why does ice freeze upwards?
Water expands when it freezes. As freezing continues, the expanding ice under the surface forces the remaining water up through the hole and it freezes around the edge forming a hollow spike. Eventually, the whole thing freezes and the spike is left.
Why doesn’t water at the bottom of the ocean freeze?
Originally Answered: why doesn’t the water at the bottom of the ocean freeze? Frozen water is less dense than liquid water. As soon as a portion of sea water froze, it would rise to the surface. The bottom could never freeze unless the whole ocean froze over.
The bottom of a lake do not freeze in severe winter. The reason is that ice is a poor conductor of heat hence once the surface is frozen no further heat is liberated or absorbed by water beneath ice. Therefore water below ice never freezes.
Why are mountains not hot?
It has more to do with air pressure. This hot air can indeed rise. But as it does, the atmospheric pressure decreases, the air expands, and it cools. So, even though they’re closer to the sun, thin air in the mountains keeps them colder than the thicker air in the lowlands surrounding them.
Why is colder the higher you go?
As you go to higher altitudes, there are less air molecules pushing down on you (lower pressure). When the pressure of a gas decreases, the temperature also decreases (the reverse is also true – when the gas pressure increases, the temperature increases). Therefore, the air temperature is lower at higher altitudes.
At what temperature will flowing water freeze?
For flowing water to freeze, the surrounding air has to be colder than 32°F, because the flowing water mixes with itself. So, the colder water on the surface mixes with the warmer water from the bottom, and the average temperature is somewhere between the two.
What is the difference between a seep and a spring?
There is little difference between a seep and a spring. Generally, if the rate of flow is rapid and continuous, it is called a spring. If the flow is slow and intermittent, it is called it a seep.
Why do icicles grow upwards?
An ice spike is an ice formation, often in the shape of an inverted icicle, that projects upwards from the surface of a body of frozen water. Ice spikes created by natural processes on the surface of small bodies of frozen water have been reported for many decades, although their occurrence is quite rare.
So while at the same temperature the freezing starts from top,the lower layers are “heated” from the layers are above,and can’t reach the temperature of freezing until the upper layer is freezed and his temperature has begun to drop below the 0°C. Because it has less density then liquid water at 0 degree and empty spaces are created.
If water were most dense as a solid, lakes would freeze from the bottom up, eventually freezing solid. In that case, little or nothing would survive in the lake. Most lakes and ponds don’t completely freeze because the ice (and eventually snow) on the surface acts to insulate the water below.
What happens when the ground freezes?
When ground is frozen solid, the water between the rocks, soil, and pebbles, and even inside the rocks, has frozen and becomes pore ice. So officially, the ground freezes when the water in the ground becomes ice. Frost Depth (or the frost line) is the deepest point to which ground water will freeze.
What is it called when the ground freezes 2 years in a row?
If the ground remains frozen for at least 2 years in a row it is called permafrost. What causes ground frost? When ground is frozen solid, the water between the rocks, soil, and pebbles, and even inside the rocks, has frozen and becomes pore ice.