Vocabulary
What is matter?
Anything that takes up space.
Which material would be the best choice to heat up quickly?
A piece of wood
OR
Copper
Copper
What are the three states of matter?
Solid, liquid, and gas
This property describes whether an object is red, blue, green, yellow, purple, etc.
Color
What is used to measure weight of an object?
A scale
What does expand mean?
to get larger and spread out to fill the space.
If I want a cooking pot to heat up quickly what material would best work?
Copper has a conductivity level of 398 W/mK
OR
Bronze has a conductivity level of 75 W/mK
Note: W/mk = watts per meter-kelvin
Copper because it has the highest conductivity level
Explain solid particles:
Closely packed together
Vibrating
Definite shape
Allows the flow of heat or electricity.
Conductivity
Thermal conductivity = Heat
Electrical Conductivity = Electricity
If Miss. Mineo collected ocean water using a glass jar and left it out in the sun all day with no lid, what would happen?
The water would evaporate out and only salt would be left in the jar.
What is volume?
How much space something takes up.
What three properties can you use to classify metals?
Chemical makeup
Smell
Reflectivity
Conductivity
Magnetism
Reflectivity, conductivity, magnetism
Explain liquid particles
Close together, but not touching
Moving slowly
Takes the shape of its container
A force that pulls together or pushes apart objects made of certain metals
Magnetism
If Mrs. Aceto collected ocean water in a glass jar, put a lid on it, and let it sit in the sun all day, what would happen?
Nothing. The lid is a CLOSED SYSTEM which does NOT allow the water to evaporate. The same amount of ocean water will still be there.
What is a physical property?
A characteristic that can be observed or measured.
When you mix sugar and water it dissolves and you can no longer see the sugar in the water. Since you can't see it, is the sugar still there? Explain.
Yes the sugar is still there because sugar is soluble. Just because we cannot see it anymore does not mean it is no longer there. Matter cannot be destroyed.
Sample Explanations:
We can prove this by calculating the mass before and after. The masses will be the same before mixing and after dissolving, proving that the sugar is still there. Also, if we tasted the water it would be sweet, proving the sugar is still there.
Explain gas particles:
Spaced apart
Moving quickly and freely
No definite shape, fill the space in the container
The ability of a substance to dissolve in a liquid
Solubility
Ms. Scott said that sand was insoluble. What does it mean if something is insoluble?
It does not dissolve in a liquid. For example in class, when we mixed the sand with the water, it did NOT dissolve. You could still see it.
What is condensation?
The change from a gas to a liquid.
A student wants to design a model that shows that some particles are too small to be seen. Which of the following should they use:
Putting air in a deflated bike tire
OR
Cutting a piece of wood
Putting air in a deflated bike tire
You cannot see the air particles, but you can see the tire expand.
Cutting wood is NOT because you can see the wood, it doesn't demonstrate invisible particles.
What is the change of a liquid to a gas called?
Evaporation
The ability of a material to be hammered or bent into different shapes without breaking
Malleability
If I have an ice cube in a metal pan and it weighed 10 grams. What would the mass be if I quickly melted it over a flame, removed it once it was melted, and measure the mass immediately after?
10 grams (the same).
Explanation: just because we changed the state of matter does not mean it is any less. If we let that pan sit out for a bit or kept it over the flame, the water would eventually evaporate, making it weigh less. However, we are measuring it immediately after allowing no time for the water to evaporate.