One example could be the addition of oxygen to Earth's atmosphere over eons by algae removing the dependence of sunlight as an energy source for animal life.
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Physical changes include changes in state, size, shape, or appearance without altering the substance's chemical composition. Chemical changes involve formation of new substances with different chemical properties. Both types of changes can be used in industry for manufacturing products, such as refining metals through chemical reactions or changing the state of a substance to make it easier to transport.
A chemical change is when substances become new substances that cant go back to its physical properties (the ability to participate in chemical reactions). Chemical changes usually absorb or let off heat. Often, a second chemical change is needed to reverse an initial chemical change. A chemical change is when substances become new substances that have different chemical properties (the ability to participate in chemical reactions). Chemical changes usually absorb or let off heat. Often, a second chemical change is needed to reverse an initial chemical change.
Chemical. Four good indicators of a chemical change are: # Change in Color # Change in Temperature # Creation of a gas # Creation of a precipitate These don't always indicate a chemical change, but are good guidelines if you are unsure.
Drying of leaves is a physical change because neither it changes its composition nor does it have any different properties from the original one.
Physical changes can include changes in size, shape, or state, while chemical changes involve the formation of new substances. Good effects of physical changes can include creating new materials like paper from wood pulp, while good effects of chemical changes include producing new medicines through chemical reactions. Both types of changes can be used to create new products and materials for various applications.
BAD EFFECTS:Acid RainBurning of Wood
Chemical changes can have negative effects on the environment by generating toxic substances, polluting water sources, and contributing to air pollution. This can harm ecosystems, wildlife, and human health, leading to long-term environmental degradation and health issues.
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Vegetation creates oxygen.
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A chemical change. Color change is a good indicator of a chemical change.
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it is good for you to now the information to every words
less pollution by cars buses plains ship