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Puberty.
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∙ 13y ago
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What is the differences of a chemical change and a physical change?
Chemical changes occur when the elements, their valences, and their amounts change. 4H + O2 => 2H2O is a chemical change because the valences change from unfilled to shared. Physical changes occur when the material phase changes. In fact, in 4H + O2 => 2H2O we also have a physical change...from gas to liquid water (in most cases). NOTE: That there was a chemical change here is incidental, the phase change is the physical change.
What is the most common way for out gassing to occur?
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Are all physical changes accompanied by a chemical change?
A physical change is a change in chemical composition. A physical change is a change where chemical composition is not altered. Not all chemical changes are accompanied by a physical change, but some are. The same is true for the reverse.
What is the physical and chemical change that occurs when a birthday candle is lit on a cake?
There are multiple physical changes and chemical changes that occur when a candle burns. One physical change is that the candle melts back into liquid wax. One chemical change is flame burning on the wick.
If a substance changes color what has most likely happened chemical or physical change?
Very probable a chemical change; but also physical changes can be the cause.
Why are most physical changes reversable?
Most physical changes are reversible because the changes only occur in in the appearance. =)
Which occurs more often on earth physical changes or chemical changes?
what involves both chemical and physical change on earths surface
Are all physical changes reversible with examples?
Not all physical changes are reversible because most times when such changes occur parts of the substance is lost to the environment.
Where on earth would most physical from temperature changes be most common?
Physical weathering from temperature changes is most common on the shorelines, because waves are able to take down rocks that have been weathers. They would be least noticeable inland, in desert areas with little forestation.
When do most weather changes occur?
There is not a specific time when weather changes occur except for the changing of the seasons.
Where do the most common earthquacks occur?
where do most earthquackes occur
When does most changes in weather occur?
Troposphere
Are all physical changes accompanied by chemical changes?
Not all chemical changes are accompanied by a visible physical change. Most chemical changes however will be accompanied by a physical change.
What is the differences of a chemical change and a physical change?
Chemical changes occur when the elements, their valences, and their amounts change. 4H + O2 => 2H2O is a chemical change because the valences change from unfilled to shared. Physical changes occur when the material phase changes. In fact, in 4H + O2 => 2H2O we also have a physical change...from gas to liquid water (in most cases). NOTE: That there was a chemical change here is incidental, the phase change is the physical change.
What are some of the non physical changes which occur during adolescence?
There are many non-physical changes that occur during adolescence, most notably the large increase in the number of conections between neurons in the brain. this is what causes the sporadic behaviour in adolescents, and helps the brain and personality to develop by 'trimming' the unnecessary synapses. The flood of hormones (testosterone and oestrogen in men and women respectively) that causes the physical changes also cause a development in the sexuality of the adolescent (it makes the horny).
What season do tornadoes occur?
Tornadoes can occur in any season but are most common in the spring.
What is the effect of physical changes?
Physical changes do not change the properties of the substance. You can get back the original state of the substance in most cases by reversing the physical process.
