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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 substance that undergo both chemical and physical changes?
Water is a common substance that undergoes both chemical and physical changes. Physical changes can include changes in state, such as melting or freezing, while chemical changes involve the formation of new substances through a chemical reaction, such as rusting or burning.
Are all physical changes accompanied by a chemical change?
No, physical changes involve a change in appearance, texture, or state of matter without altering the chemical composition of the substance. In contrast, chemical changes result in the formation of new substances with different chemical properties.
Does matter always retain it's original state?
No, matter can undergo physical or chemical changes that alter its original state. Physical changes involve a change in state without altering the chemical composition, while chemical changes involve reactions that result in the formation of new substances with different properties.
What is the physical and chemical change that occurs when a birthday candle is lit on a cake?
When a birthday candle is lit on a cake, the physical change that occurs is the wax of the candle melting into liquid form due to the heat. The chemical change involves the burning of the wax vapor to produce carbon dioxide and water vapor, along with heat and light.
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.
Why are most physical changes reversable?
Most physical changes are reversible because they involve only changes in the physical state or appearance of a substance, rather than its chemical composition. Reversible changes usually involve processes like melting, freezing, dissolving, or changes in shape, which can be easily reversed by applying the appropriate conditions to change the substance back to its original state.
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.
Which occurs more often on earth physical changes or chemical changes?
Physical changes occur more often on Earth compared to chemical changes. Physical changes involve alterations in the state or appearance of matter without changing its chemical composition. Examples include changes in shape, size, or state of matter (solid, liquid, gas). Chemical changes involve the formation of new substances with different chemical properties.
Where do the most common earthquacks occur?
where do most earthquackes occur
When do most weather changes occur?
Weather changes can occur at any time, but they are most common during transitional seasons like spring and fall when warm and cold air masses clash. Weather changes can also happen in response to approaching weather systems such as cold fronts, warm fronts, and low-pressure systems.
What climates would physical weathering most readily occur in?
Physical weathering is most likely to occur in climates with frequent temperature changes, such as in deserts and mountainous regions. These areas experience daily temperature fluctuations that contribute to the expansion and contraction of rocks, leading to physical weathering processes like freeze-thaw cycles and exfoliation.
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 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.
