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science semester one
science semester one test
| Question | Answer |
|---|---|
| what is the job of an engeneer? | to imagine a design, write it down on a blue print, build it test it then find the problems then improve it |
| what is the idea of a black box? | its something scientest use to describe something that cant be physically examined. |
| what was the idea of the humdingger? | was to create another black box or to guess what was inside. |
| heat is the flow of energy from warmer matter to cooler matter | true |
| thermal energy is the total energyof the particlesthat make up any matter | true |
| what is the difference between heat and tempatrue. | heat is the the moving particles in an objct tempatuer just mausures the heat in an object |
| tempature is a measurment of the avarage motion of the particles in a substance or object | true |
| expand is to take up more space ; to get larger | true |
| contract to take up less space; to get smaller | true |
| conduction is the flow of heat from one object to anotherby direct contact between the objects. | true |
| conducter is a substance through which energy travels. | true |
| insulator is a substance that slows down the transfer of heat. | true |
| convection is the flow of energy that occurs when warm liquid or gas moves from one place to another. | true |
| radiation is the transfer of energy from one place to another without the use of matter. | true |
| what is a model? | a model is a reprentation of something sometimes on a smaller scale |
| what is the difference between a physical and conceptual model? | a physical model is something like a model car in 3-D a conceptual model is like a blue print in 2-D. |
| if three people are collarating, what are they doing? | working together. |
| if the group that was collaborating had a problem and they came to a consensus, what did they do | they agreed. |
| what is a circut? | a circuit is a closed path that electrons can travel through. |
| what happens when you flip a switch? | it opens a circuit so electrons cant pass through. |
| What is an axle? | a shaft on whitch a wheel rotates. |
| true or false, a bearing is another word for a tire | false, a bearing is a surface that another surface rets on. |
| define a hub. | the hole or shaft through whitch an axle passes. |
| true or false, a tire is a hat. | false, a tire is a wheel that rolls. |
| what is friction? | friction is the force that slows down an object on contact. |
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