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How does air temperature change with atmospheric composition?
The composition of air depends upon altitude.
What process caused the atmosphere's composition to change so much?
Burning fossil fuel releases carbon dioxide, a greenhouse gas which is building up in the atmosphere.
What process causes the mineral composition of the rock to change?
The process is called metamorphism, the alteration of chemical composition or structure due to heat and/or pressure.
Is loss of atmospheric ozone a chemical change?
Yes, the loss of atmospheric ozone is considered a chemical change. It involves the breakdown of ozone (O₃) molecules into oxygen (O₂) due to reactions with pollutants like chlorofluorocarbons (CFCs). This transformation alters the chemical composition of the atmosphere, impacting its ability to absorb harmful ultraviolet radiation. Thus, the process fundamentally changes the substances involved, characteristic of a chemical change.
Is a change of shape caused by folding or cutting a physical or chemical change?
A change of shape caused by folding is a physical change because the substance retains its chemical composition. Cutting, on the other hand, is also a physical change as it does not alter the chemical composition of the material.
A physical change is best defined as?
a process that does not change the chemical composition of a substance. A change in a substance with no new substances being formed
Why is a tornado a physical change?
A tornado moves air and objects from one place to another and can tear apart buildings and trees. However, in all of this the chemical composition of everything hit by the tornado remains the same. Therefore all changes in this case are physical.
Is a erosion caused by wind a chemical change?
No, erosion caused by wind is a physical change, not a chemical change. The wind is simply moving particles of rock or soil from one place to another without altering their chemical composition.
What is an example of a physical change tarnishing rusting burning or melting?
Melting is an example of a physical change because it does not change the chemical composition of the substance undergoing the change. Tarnishing, rusting, and burning are examples of chemical change because they are caused by chemical reactions, which change the chemical composition of the substances undergoing the change.
Is seeds to pumpkin physical or chemical change?
This process involve chemical reactions but also physical changes.
What is the composition of the materials during physical change?
During a physical change, the composition of the materials remains the same. The change only affects the physical properties of the substance, such as its shape, size, or state of matter, without altering its chemical composition. This means that no new substances are formed during a physical change.
Why is germination of a seed is a chemical change?
The chemical composition is changed during this process.
