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Phy Sci Midterm SFHS
Richerson's Physical Science Midterm
| Question | Answer |
|---|---|
| The phase change in which a substance changes from a liquid to a gas is _____ | vaporization |
| What is the result of a force distributed over an area? | pressure |
| The phase change that is the reverse of condensation is ______ | vaporization |
| What subatomic particle has a negative charge? | electron |
| What is another name for a saturated hydrocarbon? | alkane |
| On the Celsius scale, at what temperature does water boil? | 100 degrees |
| The region in which an electron is most likely to be found is called an ____ | orbital |
| A material that is malleable and conducts electricity is most likely a _____ | metal |
| What is an example of a substance that has the highest viscosity? | corn syryp |
| A mixture that appears to contain only ONE substance is a _______ | homogenous mixture |
| The temperature and volume in a closed container of gas remain constant. If the number of particles of gas is increased, the gas pressure will ________ | increase |
| The maximum amount of a solute that will dissolve in a certain amount of solvent at a given temperature is that solute's ______ | solubility |
| The law that states that the volume of a gas is directly proportional to its temperature in kelvins if the pressure and the number of particles is constant is ______ | Charles Law |
| A gas has __________________________________________ | no definite shape or definite volume |
| What method can be used to separate parts of a liquid mixture when the entire mixture can pass through a filter? | distillation |
| At room temperature, none of the metals are __________ | gases |
| What is NOT a property of an acid? | feels slippery |
| Which of the following clocks offers the most precision? | a clock with a hand to measure hour, a hand to measure the minutes, and a hand to measure the seconds |
| You are about to open a container of soy milk but notice that there are instructions to "shake well before serving." The soy milk is most likely a _____ | suspension |
| A substance that has high reactivity ____________ | easily combines chemically with other substances |
| Which element is found in most of the compounds in your body except for water? | carbon |
| Which of the following is pure substance? | compounds |
| If you move a substance from one container to another and its volume changes, the substance is a _____ | gas |
| The type of graph used to show how a part of something relates to the whole is which of the following? | circle graph |
| The phase change in which a substance changes from a gas directly to a solid is ____ | deposition |
| A mixture can be classified as a solution, suspension, or colloid based on the ________________ | size of its particles |
| What is an example of a chemical change? | water breaking down into hydrogen and oxygen |
| What is useful for making molds because it has a low melting point? | wax |
| In Bohr's model of the atom, _______ move in fixed orbits around the nucleus | electrons |
| Why are scientific models important? | they help visualize things that are very complex, very large, or very small |
| A base is defined as a compound that produces _________ | hydroxide ions in solution |
| As you move from left to right across a row, the number of valence electrons _________ | increases |
| Ninety-nine percent of all the matter that can be observed in the universe exists as _______ | plasmas |
| How do scientists who speak different languages make their data understandable to one another? | they all use SI |
| Neutrons and ___ have almost the same mass. | protons |
| What is an example of a physical change? | sawing a piece of wood in half |
| During which of the following chemical does a precipitate form? | lemon juice is added to milk |
| What is a statement about subatomic particles is true? | an electron has far less mass than either a proton or neutron |
| A compound that has a pH of 6 in a solution, where very little of it has ionized. The compound is a __________ ________ | weak acid |
| What is a true statement about scientific theories? | scientific theories are never proven |
| Protons and ___ are found in the nucleus of an atom. | neutrons |
| What type of nuclear decay releases energy but not a particle? | gamma decay |
| The combustion of fossil fuels causes the acidity of rain to increase because ___________________________ | sulfur dioxide and nitrogen oxides dissolve in water forming sulfuric and nitric acids |
| What is a characteristic of a mixture? | has varying properties |
| The phase change in which a substance changes from a solid to liquid is _____ | melting |
| What is the process in which an unstable atomic nucleus emits charged particles or energy or both? | radioactivity |
| Group 7A of the periodic table contains the ________________ | most reactive nonmetals |
| One way to determine the degree of saturation of a solid-liquid solution is to drop a crystal of the solute into the solution. if the crystal sits at the bottom of the container, the solution is ____ | saturated |
| What is unique for any given element? | the number of protons |
| What is a characteristic of a mixture? | has varying properties |
| A substance has a melting point of 0 C and a boiling point of 100 C. The substance is most likely ________ | water |
| A solution that contains more solute than it would normally hold at that temperature is said to be _______ | supersaturated |
| To find the number of neutrons in an atom, you would subtract ____________ | atomic number from mass number |
| An acid can be defined as ______ | proton donor |
| Boyle's law states that the volume of a gas is inversely proportional to its pressure if the _________ | temperature and number of particles are costant |
| What is peer review? | a process in which scientists examine other scientist's work |
| The tendency of an element to react is closely related to ________ | the number of valence electrons in atoms of the element |
| Forces of attraction limit the motion of particles most in a _______ | solid |
| A girl tasted several foods. What is an example of a food that is NOT acidic to her? | celery |
| materials can be classified as solids, liquids, or gases based on whether their ___________ and ________ are definite or variable. | shapes and volumes |
| In order for a solution to form what must happen? | one substance must dissolve in another |
| Filtration can be used to separate mixtures based on _____ | the size of their particles |
| What happens when the data in an investigation do not support the original hypothesis? | the hypothesis is revised |
| Moving from left to right across a row of the periodic table, which of the following values increases by exactly one from element to element? | atomic number |
| What is the symbol for gold? | Au |
| In an atomic model that includes a nucleus, positive charge is ______ | concentrated in the center of an atom |
| Matter that has a definite volume but no definite shape is a ____ | liquid |
| Which of the following is unique for any given element? | The number of protons |
| The monomers from which proteins are made are _____ | amino acids |
| Which is a statement explaining why inhaling carbon monoxide is dangerous? | carbon monoxide keeps hemoglobin in the blood from carrying oxygen to cells |
| The phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first is ______ | sublimation |
| What is something that is malleable? | gold |
| During the formation of a solution, energy is ____________ | either released or absorbed |
| The number of protons in one atom of an element is that element's ______ | atomic number |
| What is the system of knowledge and the methods used to find that knowledge? | science |
| List 3 elements that contains only metals. | tin, copper, cesium |
| A substance that is made up of only one kind of atom is an _________ | element |
Created by:
dcrovato
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