When cooled, the molecules of the liquid in the thermometer move slower, causing them to get a little closer together. This results in movement down the thermometer.
Why does a mercury thermometer drop first?
Originally Answered: Why a column of mercury in a thermometer first descends slightly and then rises when placed in hot water? The glass of the bulb expands very slightly first thus dropping the level of the Mercury then the Mercury warms and expands.
Under what conditions is it better to use alcohol instead of mercury in a thermometer?
Alcohol thermometers are used rather than mercury thermometers in very cold regions because alcohol has a lower freezing point than mercury. Pure ethanol freezes at -115 degrees C, while mercury freezes at -38 degrees C.
How do you compare solids and liquids?
A solid has definite volume and shape, a liquid has a definite volume but no definite shape, and a gas has neither a definite volume nor shape.
What are the 5 properties of liquid?
Properties of Liquids
What is solid liquid and gas example?
Key Takeaways: Examples of Solids, Liquids, and Gases A solid has a defined shape and volume. A common example is ice. A liquid has a defined volume, but can change state. An example is liquid water.
What is it called when solid to liquid?
Melting point as a chemistry concept The solid begins to go from a solid state to a liquid state — a process called melting. The temperature at which melting occurs is the melting point (mp) of the substance. The melting point for ice is 32° Fahrenheit, or 0° Celsius.
What needs to happen before a gas can become a liquid?
When you reach your boiling point, the molecules in your system have enough energy to become a gas. When the temperature drops, energy will be transferred out of your gas atoms into the colder environment. When you reach the temperature of the condensation point, you become a liquid.
What happens when liquid turns to solid?
When a liquid turns into a solid the molecules slow down and begin to vibrate in place. To cause freezing energy must be removed. Because you are removing heat to freeze a substance it is called a exothermic change. The point at which this happens is called the freezing point.
Can something be a solid and liquid at the same time?
Scientists have discovered a new state of physical matter in which atoms can exist as both solid and liquid simultaneously. Researchers have found, however, that some elements can, when subjected to extreme conditions, take on the properties of both solid and liquid states.
What is a solid and liquid mixed together called?
When a solid dissolves the solid (solute) and the liquid (solvent) form a very close intimate mixture called a solution.
Are humans solid or liquid?
60% of an adult's body is made of water, which means that the human body would be at least 60% liquid. Another 15% of of the body is made of bone, which is mostly solid. The other 25% would be mostly made of a combination of different substances in different states of matter.
Is water the only liquid?
At room temperature (anywhere from zero degree centigrade to 100 degrees centigrade), water is found in a liquid state. Molecular water, therefore is a liquid at room temperature, a fact that is profoundly significant for all living things on this planet. Water is a Universal Solvent. Everything dissolves in water.
What liquids have no water in them?
Bromine and mercury are liquids are room temperature and, when pure, have no water in them. Pure solvents and compounds (other than water) have no water.
What liquids are not water?
Non-water based liquids like cooking oils, kerosene, mineral turpentine, paraffin oil and oil based paints are less frequently identified. Evidence suggests that students freely associate liquids with water or assume they all contain some water because they are a liquid.
Why water is really really weird?
Water molecules can float upwards, against the force of gravity. That's because they love to stick to each other. They're so good at it that they can actually pull each other up through tiny channels, such as the tiny blood vessels in your body. That's how oxygen and nutrients reach the edges of your brain.
Why is water so incredible?
In the liquid form, the hydrogen atoms of one water molecule are attracted to the oxygen atom of another molecule. Each water molecule can form up to four of these hydrogen bonds and, collectively, they give water a cohesiveness unique in liquids.
When did Oceans form on Earth?
about 3.8 billion years ago
