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Science Q. Review
| Question | Answer |
|---|---|
| What happens when a solid, like salt, dissolves? | the grains become smaller in size and mix evenly with the liquid |
| Examples of changes in states of matter - | ice melting, water freezing, droplets forming on a cold glass |
| Properties of a Liquid - | indefinite shape (shape can change), definite volume (CANNOT expand) |
| Properties of a Solid - | definite shape and definite volume (shape does not change, volume does not change) |
| Properties of a Gas - | Indefinite shape and indefinite volume (shape CAN change, volume CAN change - it can expand and get bigger) |
| What is a conductor? | a material that ALLOWS heat and electricity to flow through |
| What is an insulator? | a material that STOPS heat and electricity from flowing through |
| Examples of conductors - | ALL metals are conductors (steel, iron, aluminum, gold, copper and more) |
| Examples of insulators - | rubber, glass, cardboard, cloth, paper, cotton |
| Why does oil float on top of water? | because the oil has a different relative density |
| "Maintain physical properties" means - | the ingredients DO NOT change after being mixed, everything looks the same after mixing |
| "Change physical properties" means - | the ingredients CHANGE after being mixed, things do not look the same |
| What tool is used to separate a mixture with one magnetic ingredient? | a magnet |
| What tool is used to separate a mixture with ingredients that are different sizes? | sieve/strainer |
| What tool is used to separate a mixture of sand and water? | filter |
| What tool is used to separate a solution? | hot plate (evaporation) |
| What happens when water boils? | liquid water evaporates, steam rises off the pan, the amount of liquid water decreases |
| In a density tower(liquids stacked on top of each other), the top layer is - | least dense |
| In a density tower (liquids stacked on top of each other), the bottom layer is - | most dense |
| Mixtures where ingredients CHANGE physical properties | water + sugar, water + salt, chocolate powder + milk |
| Mixtures where ingredients RETAIN (keep) their properties - | sugar + sand, iron filings + sand, sand + water, oil + water |
| Insoluble means - | CANNOT dissolve in water |
| Soluble means - | WILL dissolve in water |
| Examples of Insoluble Materials | sand, iron filings, gravel, copper penny, rubber |
| Examples of Soluble Materials | salt, sugar, powdered drink mix, chocolate powder |
| Basic parts of a circuit - | wires, battery, light bulb |
| Open switch means - | light bulb will not light up |
| Closed switch means - | light bulb will light up |
| Examples of light energy - | sunlight, lamps, light bulbs, candles, fires, Christmas lights |
| Examples of electrical energy - | ANYTHING that plugs in or requires batteries |
| Examples of mechanical energy - | movement energy - running, walking, rolling, hopping, bicycle, pencil sharpener, spinning blades in a blender or fan |
| Examples of thermal energy - | heat energy - fires, candles, heater, stove |
| Examples of sound energy - | yelling, laughing, singing, bell ringing, fireworks |
Created by:
nowlinclass
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