What are some physical changes caused by changes in temperature?

What are some chemical changes caused by changes in temperature?

Freezing a popsicle

Why some stars twinkle and why some do not?

The twinkling of the stars is caused by changes in temperature and pressure in our atmosphere. Therefore it is random, and not a meassure of the stars.

What are things that have physical changes?

Water because It is first solid its ice then when it melts it is liquid and when it is a gas its water vapor.

Is cabbage juice and vinegar a chemical or physical change?

Chemical, physical is generealy changes between the states of matter, although those are not the only physical changes

Is boiling potatoes a chemical or physical change?

Physical, because it doesn't change chemical make up it just changes the appearance and texture

How are physical and chemical changes affected by temperature?

Chemical reactions involve changing the materials that you're dealing with into new materials, and the changes that you see are the result of the appearance of the new materials. The new material might have a different phase than the starting materials. For example, if you create something new from two liquids and it happens to be a gas, then you will get gas bubbles. There will be a new material with a new phase that wasn't there before. Also, you can observe chemical reactions by seeing color changes, if the new material has a different color than the starting materials. When a chemical reaction takes place, usually the temperature will also change. It will either go up or down, sometimes imperceptibly. Those are the kinds of changes that you might see. In chemical reactions the changes that you observe are caused by the creation of or loss of different kinds of materials. Physical changes are similar in some ways because you are looking at the same kinds of things--changes in the phase, the color, the temperature. But the physical changes are changes in the condition of the material or changes caused by mixing materials together or taking them apart--just mixing or separating, not the creation of something new. For example, temperature changes are physical changes if they are caused by heating or cooling. If you add heat to something and the temperature goes up, that is a physical change. If you cool it off and the temperature goes down, that is a physical change. Phase changes are physical changes also, if they are caused by heating or cooling. If you take some water and you heat it up and it changes to gas, that is a physical change. You still have water, only now it is steam instead of liquid. Also included in physical changes are color changes that are caused simply by mixing or by diluting a material or, in some cases, even by heating. For example, if you turn on an electric range and the element gets hot, you can see a color change. That is also a physical change. Physical changes and chemical changes have much in common in that you are looking at similar kinds of results. The difference is whether the appearances or differences that you see are from a change in the condition of the material or from a change in what materials are present. That's the kind of thing you need to look for to distinguish between a chemical reaction and a physical change. It takes an inference to make that distinction. Sometimes it is very difficult to make that distinction and in some cases even chemists can get into arguments sometimes over what constitutes a physical or a chemical change. For example, when salt dissolves in water, some people say that is simply a physical change because if you evaporate away the water, you have the salt back again. Other people argue that there is a chemical change because the material present in solution has different properties than the separated pure water and pure salt. The solution will conduct electricity and the pure water and pure salt will not. So, there are cases where the distinction between physical and chemical changes gets kind of blurred. In a few weeks we will have more criteria we can use to distinguish between physical and chemical changes.

Can physical propertys be observed then reversed back?

Some physical properties can be reversed back after they have been observed, while others cannot. Properties like temperature, magnetization, and electrical conductivity can often be reversed by changing the conditions that caused them. However, certain irreversible changes may occur due to chemical reactions or physical deformations.

What are some physical changes when rusty metal is an example?

what are some physical changes when rusting metal is an example

What are some inventions that involve physical changes?

Some inventions that involve physical changes include the light bulb (converting electrical energy into light), the refrigerator (changing the temperature to preserve food), and the microwave (using electromagnetic waves to heat food).

Are all changes in a food web caused by people?

False some changes are caused by people not all

What happens to the physical properties of substances when they are at room temperature?

At room temperature, the physical properties of substances can change. For example, some substances may melt, freeze, evaporate, or condense. These changes can affect properties like color, texture, and state of matter.

How matter changes state-?

With the help of some physical and chemical processes matter changes its state. Like using heating , cooling etc we can change the state of matter,