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Measuring Matter
Chapter 2 Section 2 Physical Science
question | answer |
---|---|
What is the SI unit for mass? | the kilogram is the SI unit for mass. |
How are millimeters related to cubic centimeters? | One millimeter and one cubic centimeter are exactly the same volume. |
Why does the oil in some salad dressings rise to the top of the bottle? | The oils in salad dressings have densities lower than that of water. |
What is mass? | mass is the measure of the amount of matter in an object. |
Why is mass more useful than weight for measuring matter? | The mass of an object is constant. Its weight, however, can vary from place to place because weight is a measure of the force of gravity on the object. |
What property of matter is measured in cubic centimeters? | volume |
How are milliliters related to liters? | 1,000 milliliters equal one liter. |
A plastic box is 15.3 cm long, 9.0 cm wide, and 4.5 cm high. What is its volume? | 620 cubic centimeters |
What measurements must you make to find the density of a sample of matter? | Mass and volume |
How can you determine whether a solid substance is more dense or less dense than water? | Put the solid substance in water. If it sinks, it is more dense than water. If it floats, it is less dense than water. |
Propose a way to determine the density of air. | using a balance, measure the mass of an empty balloon. Fill the balloon with air. Measure the mass of the filled balloon. The difference in the two values is the mass of the air. Then measure the volume of the balloon using the water displacement method. |