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Martin Science Final
A set of flashcards for Mrs. Martin's Class Final
| Question | Answer |
|---|---|
| What is physical science a study of? | Matter And Energy |
| What 2 things make a hypothesis valid? | Supported by evidence & testable |
| How would you design a controlled experiment to figure out if a new medicine produces side effects? | You would have to have a control group with a person that hadn't taken the medicine. |
| What are three things that scientific models are good for? | Representing ideas, Tools to conduct investigations, illustrate theories |
| What are the two groups and one vocab word that a controlled experiment includes? | control group, experimental group, variable |
| How do you find the volume of a cube? | lxwxh |
| How does density affect whether something floats or sinks? | If the density is less than one it will float. If the density is more than one it will sink. |
| When you add a rock to 70 mL of water in a graduated cylinder, the water rises to 90 mL. The mass of the rock is 20 g. What is the rock's density? | 1 g/cm cubed |
| What tool is used to find mass? | Balance |
| What do each of the metric prefixes stand for? | milli-1/1000 centi-1/100 kilo-1000 |
| What tool is used to find liquid volume? | Graduated Cylinder |
| What is the appropriate unit of measurement to find the length of a piece of corn? | mm |
| What label is most appropriate for the volume of a liquid like vinegar in a scientific experiment? | mL |
| What is a physical property? | A property that can be observed or mesured without changing the identity ofthe matter. |
| What are some examples of chemical properties? | Flammable, nonflammable, solubility, oxidation |
| When copper interacts with substances in the air to produce new substances with different properties it is an example of what? | Chemical Change |
| How many mL is in 30 cm cubed? | 30 mL (one mL for every cm cubed) |
| What is the density of a substance that has a mass of 10 g and has a volume of 80 cm cubed? | 0.125 g/cm cubed |
| What is the mass of an cube that has the dimensions 15 cm x 8 cm x 4 cm and has a density of 19.32 g/cm cubed? | 9273.6 g |
| What is a characteristic property? | a.) Helps identify a substance b.) Doesn't change if the amount of the substance changes c.) Can be physical or chemical properties |
| What would be the appropriate unit of measurement for a large solid lke a train car? | meters cubed |
| What is the definition of reative? | When two substances react together to form a new substance with new properties. |
| During physical canges matter always retains it's ________. | identity |
| When you break a piece of chalk in half, this is an example of what kind of change? | Physical |
| Dew collecting on a spider web in the early morning is an example of what? | Condensation |
| Which state of matter does not change shape in different containers? | Solid |
| What changes of state are exothermic? | Condensation, Freezing |
| What changes of state are endothermic? | Sublimation, Vaporization, Melting, Boiling, Evaporation |
| What can affect the temperature that water boils at? | Air pressure |
| What are the four states of matter? | Solids, liquids, gases, plasmas |
| If something is a solid at room temperature, its melting point is what compared to water? | Higher |
| What is frezing? | The phase change when a liuqid changes into a solid. |
| What are the terms used to describe phase changes? | Sublimation, Melting, Vaporization, Condensation, Freezing. Boiling and Evaporation are types of vaporization. |
| The amount of force exerted over a given area is called __________. | pressure |
| What is Charles Law? | For a fixed amont of gas at a constant pressure, the volume of the gas increases as the temperature increases, and the volume of the gas decreases as the temperature decreases. |
| What happens to the volume of a gas when temperature decreases? | It decreases |
| A substance that pours slowly has a high ____________. | Viscosity |
| Describe amorphous solids. | Solids composed of atoms or molecules in no particular order. |
| Friction is a fore that _________________. | Opposes motion |
| If passangers on a bus watch another bus pass them, what is their frame of reference? | The bus they are on |
| What is acceleration? | The rate at which velocity changes |
| What information do you need to calculate acceleration? | Starting velocity, ending velocity, and the time taken to make the change. |
| Two forces are acting on an object. One force has a magnitude of 10 N East. The other has a magnitude of 5 N West. What is the net force? | 5 N East |
| What is the SI unit for speed? | m/s |
| What is the label for force? | Newton |
| You are in Davenport and decide to travel to Chicago, IL. In one hour you have traveled 80 km. What is your velocity? | 80 km/hr east |
| The deck of a pool becomes very slippery to walk on when wet because of what type of friction? | Fluid Friction |
| A person is walking to the front of a train that is traveling 40 m/s. The person is walking 3 m/s. What is the resultant velocity? | 43 m/s forward |
| How do you find speed? | Distance/Time |
| What is the definition of force? | A push or a pull; all forces have size & direction |
| How can forces change motion? | They can make it go faster, slower, or make it change direction |
| Give several examples of fluids | Oil, Oxygen, Water |
| How much pressure is exerted on the floor by a 2500 N crate with an area of 2 meters squared? | 1250 Pa (force/area) |
| What did Democritus, Dalton, JJ Thomson, Rutheford, and Bohr all have in common? | They all contributed to the atomic theory. |
| What is the smallest particle into which an element can be dividede and still be the same element? | Atom |
| An element hat is a very reactive gas is likely to be a member of what family? | Halogens |
| Alkali metals are in what group on the periodic table? | 1 |
| Are Alkali metals found uncombined in nature? | No |
| What happens when alkali metals comes in contact with water? | It catches fire |
| How many atomic numbers does each element have? | 1 |
| Moseley arranged the periodic table in terms of _______________. | Atomic Number |
| What family of elements is the least reactive? | Noble Gases |
| What science term from chapter 4 best describe beef stew? | mixture |
| What are some comon examples of compounds? | Salt, water, sugar |
| What are some common examples of solutions? | salt water, koolaid, air |
| What type of substance can be separated into simpler substances ONLY by chemical means? | Compounds |
| What categry of element conducts thermal energy well and is easily shaped? | Metals |
| How are mixtures different from compounds? (Use the term characteristic properties in your answer) | When elements form compounds, their characteristic properties change. When substances form mixtures, they don't. |
| What are the three major categories of elements? | Metals, nonmetals, and metalloids |
| What is a ratio? | A relationship between two numbers |
| How does the word ratio relate to compounds? | Compounds are formed when elements join in a specific ratio |
Created by:
rinteck
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