Because we will have it on a test and we will have to know that a chemical change actually changes the substance and a physical change just changes the apperance such as size or shape.
That way you can understand certain changes of things when they happen. It is also to determine how it was changed. That is why it is important to determine if it is physical or chemical change.
A physical change is someting that happens that changes the appearance of an object, but does not change the chemical makeup. Chemical change is a change in the chmical makeup of on object. It is important to know the difference, because a chemical change sometimes changes the what the object looks like, this may lead people to believe that a physical change has happened.
so you know how it would change becasue we will probably be tested on it. it is also just good to know. also so you understand things when they happen.thats why you should know that.
Because someday a man may come up to you and put a gun to your head. Then he will say, "Tell me the difference between a physical and chemical change! Now!" Then you'll say, "A chemical change involves chemicals combining or separating to form a new product. A physical change involves a change in appearance, pretty much."
well because i mean come on there is not a day that goes by that i dont ask myself ..... was that a physical or chemical change...... haha and because he are learning about it in class and stuff like that.
because you will identify a chemical and physical will help you understand how things in life happen. When you understand this you can grasp any concept bout chemical and physical changes.
You would want to know the difference between them because a chemical change is a change of one substance into a new substance. A physical change can be any change in size, shape, or state of matter in which the identity of the substance remains the same. So you would want to know the difference because they both do different things
I don't know why we need to know it but i do kno that we will probably have it on a test and I do know that a chemical change is a change in the subsance and a physical change is a change in the appearence and size.
You need to know the difference because when the change happens you will know what it is. You should also know the difference because eventually we will be tesed on it. That's why it's important to know the diference between a chemical and physical change.
Because we will use it in science in high school and in college. We need to know the difference because you never know when you may need it. Mixing them up could be very bad.
we need to know the difference because chemical change is just the changes of a substance and a physical change is just the way it looks like or what size it is or even what shape.
a physical change changes the appearance such as size and shape. chemical change changes the substance. Its important to know the difference so we can get a better understanding on whats going on around us. also because were learning it in class. and we may need it later in life. we have to know it so when we go to high school or college we can learn harder stuff and not just keeping learning the same thing over and over.
18 comments:
Because we will have it on a test and we will have to know that a chemical change actually changes the substance and a physical change just changes the apperance such as size or shape.
That way you can understand certain changes of things when they happen. It is also to determine how it was changed. That is why it is important to determine if it is physical or chemical change.
A physical change is someting that happens that changes the appearance of an object, but does not change the chemical makeup. Chemical change is a change in the chmical makeup of on object. It is important to know the difference, because a chemical change sometimes changes the what the object looks like, this may lead people to believe that a physical change has happened.
Because if you change something physically, it is still the same thing. If you change something chemically, it may not be safe to be around anymore.
Because we have to know sometimes in everyday life and know which one is which. They can't be mixed because that owuld be super bad!
so you know how it would change becasue we will probably be tested on it. it is also just good to know. also so you understand things when they happen.thats why you should know that.
Because someday a man may come up to you and put a gun to your head. Then he will say, "Tell me the difference between a physical and chemical change! Now!" Then you'll say, "A chemical change involves chemicals combining or separating to form a new product. A physical change involves a change in appearance, pretty much."
well because i mean come on there is not a day that goes by that i dont ask myself ..... was that a physical or chemical change...... haha and because he are learning about it in class and stuff like that.
because you will identify a chemical and physical will help you understand how things in life happen. When you understand this you can grasp any concept bout chemical and physical changes.
You would want to know the difference between them because a chemical change is a change of one substance into a new substance. A physical change can be any change in size, shape, or state of matter in which the identity of the substance remains the same. So you would want to know the difference because they both do different things
I don't know why we need to know it but i do kno that we will probably have it on a test and I do know that a chemical change is a change in the subsance and a physical change is a change in the appearence and size.
Because a chemically changed substance will react differently. a physically changed one will only look different. it will react normally
You need to know the difference because when the change happens you will know what it is. You should also know the difference because eventually we will be tesed on it. That's why it's important to know the diference between a chemical and physical change.
because it mght be on a test and you might need to know it on a test.
Because we will use it in science in high school and in college. We need to know the difference because you never know when you may need it. Mixing them up could be very bad.
we need to know the difference because chemical change is just the changes of a substance and a physical change is just the way it looks like or what size it is or even what shape.
a physical change changes the appearance such as size and shape. chemical change changes the substance. Its important to know the difference so we can get a better understanding on whats going on around us. also because were learning it in class. and we may need it later in life. we have to know it so when we go to high school or college we can learn harder stuff and not just keeping learning the same thing over and over.
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