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Digested food , soured milk, Statue of Liberty , and cake mix batter
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What should not be used to indicate a chemical reaction?
Change of shape can not be used to indicate a chemical reaction has happened. Examples of evidence of a chemical reaction are changes in odor or color.
What good changes have happened to Philippine environment because of chemical changes?
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What can indicate physical or chemical changes depending on the cause of the change?
People can
What shows changes that take place during a chemical reaction?
Evidence of a chemical reaction includes color change, formation of precipitate, evolution of gas, and changes in temperature. These changes can indicate that new substances are being formed through the rearrangement of atoms.
What are the changes that may accompany a chemical changes?
- a change in color -a change in odour -bubbling -a change of state (eg. solid to liquid, gas to liquid, etc.) either one or a combination of these things can indicate a chemical change.
Does gas always indicate a chemical change?
No, the presence of gas does not always indicate a chemical change. Gas can form due to physical processes such as evaporation or changes in temperature, without any chemical reactions taking place.
How does a Cardboard Thermometer work?
A cardboard thermometer works by using a temperature-sensitive chemical that changes color in response to temperature changes. The chemical is typically housed in a sealed glass tube and as the temperature changes, the chemical expands or contracts, causing the color to indicate the temperature. The cardboard backing provides structure and stability to the thermometer.
What change in a physical property of matter can indicate?
A change in a physical property of matter can indicate a physical change, such as a change in state (solid to liquid), color, shape, or texture. These changes do not alter the chemical composition of the substance.
What is chemical indicator dye?
Chemical indicator dye is a substance that changes color in the presence of a specific chemical or changes in pH. It is commonly used in laboratories to visually indicate the presence or absence of certain substances in a solution.
What are four things that indicate that a chemical change may have taken place?
Change in color: If the substance changes color during a reaction, it may indicate a chemical change. Formation of gas: Production of gas bubbles, fizzing, or bubbling is a sign of a chemical change. Temperature change: Significant heat or cooling effects can indicate a chemical reaction is occurring. Formation of a precipitate: When a solid substance forms in a solution, it suggests a chemical change has taken place.
What can indicate a physical or chemical change?
Physical changes can be indicated by changes in appearance, texture, size, or state of matter without altering the chemical composition. Chemical changes, on the other hand, can be indicated by the formation of new substances, changes in color, temperature, odor, or the production of gas.
Why do you need indicators of chemical change?
Indicators of chemical change are needed to detect when a chemical reaction has occurred. They can provide visual cues, such as color changes or gas production, that indicate a chemical transformation has taken place. These indicators help scientists and chemists monitor and understand the progress of reactions.
