| A | B |
|---|
| During which phase change does the arrangement of water molecules become more orderly | freezing |
| The phase change in which substance changes from a liquid to a gas is | vaporization |
| The phase change in which a substance changes from a solid to a liquid is | melting |
| The phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first is | sublimation |
| The phase change in which a substance changes from a gas directly to a solid to be is | deposition |
| Which of the following phase changes is an endothermic change | vaporization |
| Which of the following phase changes is an exothermic change | melting |
| What is the second step in the scientific method | make the observation |
| What is the third step in the scientific method | forming a hypothesis |
| 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 |
| If the volume of the cylinder is reduced from 8.20 l to 4.0 l the pressure of the gas in the cylinder will change from 70 kilopascals to | 35 kilopascals |
| What type of change occurs when water changes from solid to a liquid | a phase change a physical change and irreversible change both A and the |
| The phase change that is the reverse of condensation is | sublimation |
| The law that states that the volume of all a gas is a direct proportion to its temperature in kelvins is | Charles law |
| In the phase change that is the reverse of condensation is | sublimation |
| During a phase change the temperature of a substance | increases or decreases |
| The phase change that is the reverse of sublimation is | condensation |
| The definition of the gas is | no definite shape or definite volume |
| 99% of all matter that can be observed in the universe exists as | plasmas |
| Matter that has a definite volume but no definite shape is | liquid |
| If you move a substance from one container to another and its volume changes the substance is A | gas |
| A system of knowledge and methods used to find that knowledge | science |
| A branch of natural science | physical science |
| example of earth science overlap life science | earth science involving studying a living organism |
| Building blocks of all matter | atoms |
| Name one of the main ideas of physical science | the universe is very old and very large |
| In which step of the scientific method is information obtained through the senses | making a observations |
| What happens when the data in an investigation does not support the original hypothesis | the hypothesis is revised |
| What is a statement that summarizes a pattern found in nature | a scientific theory |
| What is the main statement about scientific theories | scientific theories become scientific laws |
| Why are scientific models important | they help visualize things that are very complex very large or very small |
| What is the most important safety rule | always follow your teacher is instructions |
| On the Celsius scale at what temperature does water boil | 100 |
| Approximately how many kelvins are equal to 60°Celsius | 333 |
| What type of graph shows how a part of something relates to the whole | circle graph |
| What is the relationship in which the ratio of the manipulated variable and the responding variable is constant | direct proportion |
| How do scientists communicate the results of investigations | by peer review |
| Named three examples of peer review | by publishing articles in scientific journals by giving talks at scientific conferences by exchanging e-mails |
| A process in which scientists examine other scientists work | peer review |
| If the relationship between the manipulated variable and responding variable is a direct proportion what will the relationship look like | a straight line |
| A substance that is made up only one kind of atom of | elements |
| What is the symbol for aluminum | Al |
| What is the symbol for gold | au |
| If a material contains three elements joined in a fixed proportion | compound |
| Why is the water considered a compound | it always has two hydrogen atoms for each oxygen atom in an cannot be broken down into a simpler substances |
| What is a characteristic of a mixture | has varying properties also has fixed composition |
| A mixture that appears to contain only one substance | homogeneous mixture |
| A mixture can be classified as a solution suspension or colloid based on | size of its largest particles |
| If a product says to shake well before serving the product is most likely a | suspension |
| Is glass malleable | No |
| is pottery malleable | No |
| Is Gold malleable | Yes |
| Which material has the highest viscosity corn syrup or orange juice | corn syrup |
| A substance has a melting point of 0° C and a boiling point of 100° C the substance that is | water |
| If material that is malleable and conducts electricity is most likely | a metal |
| What physical properties of nylon and leather make them good materials to use for shoelaces | durability and flexibility |
| Which of the following materials is useful for making molds because it has a low melting point | wood and metal plate or wax |
| Filtration can be used to separate mixtures based on | their particles size |
| What method can be used to separate parts of a liquid mixture when the entire mixture can flow through the filter | distillation |
| Which of the following does not change during a physical change | shape temperature volume composition |
| Which of the following is a physical change? | Sawing a piece of wood in half burning a piece of wood rust forming on an iron fence a copper roof changing color from red to green |
| Flammability is a materials ability to burn in the presence of | oxygen |
| A substance has a high reactivity when | easily combines chemically with other substances |
| What are the three clues that a chemical change has occurred | changing color production of a gas formation of a precipitate |
| During which of the following chemical changes does a precipitate form | vinegar is added to baking powder a lemon juice is added to milkd lemon juice is added to water a banana ripens |
| Which of the following is a chemical change | ice melting ice being carved water boiling water breaking down into hydrogen and oxygen |
| Vinegar and baking soda are mixed a gas forms that is a clue that what kind of change has taken place | chemical change |
