Conservation of Matter
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5th Grade Science › Conservation of Matter
Which of these terms is a measurement of how much matter is in an object?
Mass
Size
Volume
Weight
Explanation
Mass is the measurement of how much matter is in an object. The Law of Conservation of Matter says that matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear; it merely changes from one form to another. This means that the mass does not change. If I find the mass of a whole cookie and then break it up and put all of the pieces back on the scale, the mass will be the same because the matter has been conserved.
Which of these terms is a measurement of how much matter is in an object?
Mass
Size
Volume
Weight
Explanation
Mass is the measurement of how much matter is in an object. The Law of Conservation of Matter says that matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear; it merely changes from one form to another. This means that the mass does not change. If I find the mass of a whole cookie and then break it up and put all of the pieces back on the scale, the mass will be the same because the matter has been conserved.
A scientist adds a few teaspoons of sugar to a cup of warm water and begins to stir. Eventually the sugar dissolves into the water. Which of the following graphs best represents the amount of matter in the sugar before and after the scientist began stirring?
Explanation
The Law of Conservation of Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another.
A scientist adds a few teaspoons of sugar to a cup of warm water and begins to stir. Eventually the sugar dissolves into the water. Which of the following graphs best represents the amount of matter in the sugar before and after the scientist began stirring?
Explanation
The Law of Conservation of Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another.
Will the mass change when reactants combine to form products in a chemical reaction? Why?
Yes; A new substance is bring formed, so the mass will increase.
There is no way to know what will happen to the mass of the substances without exact data.
No; The combined mass of the newly formed and existing substances will stay the same.
Explanation
The total mass should be the same as the sum of the individual masses recorded before the contents were combined, and the reaction took place. The reactants have been transformed into a new substance, but that all the individual atoms making up the reactants are still present in the products. That’s why the mass stays the same. The Law of Conservation of Matter says that matter remains the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear; it merely changes from one form to another.
Will the mass change when reactants combine to form products in a chemical reaction? Why?
Yes; A new substance is bring formed, so the mass will increase.
There is no way to know what will happen to the mass of the substances without exact data.
No; The combined mass of the newly formed and existing substances will stay the same.
Explanation
The total mass should be the same as the sum of the individual masses recorded before the contents were combined, and the reaction took place. The reactants have been transformed into a new substance, but that all the individual atoms making up the reactants are still present in the products. That’s why the mass stays the same. The Law of Conservation of Matter says that matter remains the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear; it merely changes from one form to another.
Lamonte is doing a science experiment. They have a jar full of 10 grams of sugar. They add 5 grams of a mystery chemical. When the two are mixed, they create a new solid and no gases. The container is very hot. How many grams of the new substance should be in the jar at the end of the experiment?
15
10
5
12
Explanation
The answer is 15 grams because 10+5 = 15 and the amount of grams should stay the same since matter is conserved.
The Law of Conservation of Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another.
Lamonte is doing a science experiment. They have a jar full of 10 grams of sugar. They add 5 grams of a mystery chemical. When the two are mixed, they create a new solid and no gases. The container is very hot. How many grams of the new substance should be in the jar at the end of the experiment?
15
10
5
12
Explanation
The answer is 15 grams because 10+5 = 15 and the amount of grams should stay the same since matter is conserved.
The Law of Conservation of Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another.
In which of these situations does the some of the matter disappear, instead of changing forms?
water boils away
a large log burns away to a small amount of ash
sugar disappears when mixed with water
all of these
none of these
Explanation
The Law of Conservation of Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another.
In which of these situations does the some of the matter disappear, instead of changing forms?
water boils away
a large log burns away to a small amount of ash
sugar disappears when mixed with water
all of these
none of these
Explanation
The Law of Conservation of Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another.