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Substances can change state, usually when they are heated or cooled. For example, liquid water turns into steam when it is heated enough, and it turns into ice when it is cooled enough. The closeness, arrangement and motion of the particles in a substance change when it changes state.
gdnf gene
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∙ 12y agoBY adding or removing thermal energy
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What are two effects caused by chemical change?
the substance will become an entirley new substance.
Is a change that produces a new substance is a chemical change?
False. This is a chemical change. A physical change is, for example, when Ice melts into water. It is the same element but it is in a different form. A chemical change is, for example, when two hydrogen atoms and an oxygen atom come together to form a water molecule, thereby producing a new substance.
If you are trying to decide whether a chemical reaction does or does not take place when two substances are mixed what kind of evidence will you look for?
change of state change of colour fizzing/gas bubbles
Is a tree that is cut into boards at a sawmill a chemical change?
Sawing a board in half is not an example of chemical change. It is an example of a physical change. Physical changes on a substance do not change the substance. When you saw a board in half, the two halves of the boards are still boards- they're not anything else.
What are the factors that bring about physical and chemical change?
A physical change is a change of state that does not affect the properties of the substance. Example: Ice melting to water. It's still water, just in a different form. A chemical change is a change of properties in a substance, which creates* a new substance. This happens when two substances combine. Example: Lighting a peice of paper on fire. When this happens, the fire and the paper put together creates ash. *Note: You can not create or destroy mass, only change it. Example: If the paper weighed 1 g before it's burning, it will weigh the same after.
What are two physical properties that can vary even when the substance with these properties dose not change?
The density and state of matter (solid, liquid, or gas) of a substance can change with changes in external conditions even in the absence of any change in the substance itself.
Is it true melting is considered an sublimation change because energy is gained by substance as it changes stae?
Melting is a phase change in which a substance changes from the solid state to the liquid state. Sublimation is a phase change in which a solid moves directly into the gas phase. Both melting and sublimation are two types of physical change.
What are two ways that a substance can be described?
mixture or a compound
What are two effects caused by a chemical change?
Two effects that are caused by a chemical change are changes from one substance into another. Another effect that can be caused by a chemical change is a change in the temperature of the surrounding system and substance, or a change in color of the substance.
What two ways does the suns position in the sky change?
what two ways does the suns position change in the sky
Why did The two party largely offered a choice between?
The two party system offer a choice between Change and Established Ways
What are two effects caused by chemical change?
the substance will become an entirley new substance.
What two determine the state of a substance?
Temperature and pressure
What are two physical properties that can that can vary when the substance with these physical properties that dose not change?
Temperature and amount of the substance do not change chemical properties.
What are two physical properties that can vary even when the substance with these properties does not change?
i think Buoyancy and Density are two physical properties that can vary even when the substance with these properties doesn't change.
What are two of the ways that the velocity of a car can change?
Change in direction change in speed
What are two ways in which the physical state of matter can be changed?
Two ways in which physical state of matter can be changed:- changing the temperature- changing the pressure
