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Matter Quiz
| Question | Answer |
|---|---|
| What is the difference between physical properties and chemical properties? | Physical properties c be observed without changing pure substances into other substances. Chemical properties can be observed only by changing pure substances into other substances. |
| A metal melts at 450oC. Is this property of the metal classified as chemical or physical property. EXPLAIN your choice. | Melting point is a physical property because the metal is still the same substance, it is only changing form. |
| Helium does not react with any other substance. Is it accurate to say that helium has no chemical properties? EXPLAIN. | No. The fact that helium does not react with any other substance is a chemical property because it describes helium’s ability to change (or not to change) into different substances |
| How are elements and compounds similar? How do they differ? | Both elements and compounds are pure substances. While elements are not made of simpler substances, compounds are made up of two or more chemical elements that are chemically combined. |
| Plants make a sugar compound with the formula C6H12O6. What elements make up this compound? | C6H12O6 is made up of the elements carbon, hydrogen, and oxygen. |
| How does a heterogeneous mixture differ from a homogeneous mixture? | You can see the different parts of a heterogeneous mixture, but the substances in a homogeneous mixture are so thoroughly mixed you cannot see them. |
| Why is it correct to say that seawater is a mixture? | Seawater is a mixture made up of salt, water, and many other substances. |
| Suppose you stir a little baking soda into water until the water looks clear again. How could you prove to someone that the clear substance is a solution, not a compound? | You could put some of the liquid in an open container. When the water in the solution evaporates, solid baking soda would remain. |
| 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 place to place because weight is a measure of force of gravity on the object. |
| What property of matter is measured in cubic centimeters? | Volume |
| How are milliliters related to liters? | 1000 mL = 1 L |
| A plastic box is 15.3 cm long, 9.0 cm wide, and 4.5 cm high. What is the volume? Don’t forget your units! No naked numbers! | 620 cm cubed |
| What measurements must you make to find the density of a sample of matter? | mass and volume |
| How can you determine whether a solid object 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 you could find out how dense the air in the classroom is. Remember what you need to know to calculate density and then make a plan. | Using a balance, measure the mass of an empty balloon. Fill the balloon with air.Measure the mass of the filled balloon. the difference between the two values is the mass of the air. Then measure the volume of the balloon using the water placement method |
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noahnoahnoah1324
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