Vocab
What is the definition of balance?
Even distribution of force that involves stability
What is the definition of particles?
A tiny part of matter
What does gas particles look like?
The particles are spread apart very much so they can move around
How do you use a pan balance?
You first calibrate the pan balance. Then you put your object in. You also put in your metric weights. Then, you try and find the weights that will match up with the object that you chose. After that, you count the weights to find the weight of that object
What is the contrast between conductors and insulators for electricity? Which material is better
An insulator doesn't let electricity pass easily. A conductor can though. Conductors are usually metal. Good insulators are rubber, wood and plastic
What does mixture mean?
A substance made by combining other substances
What does matter mean?
Everything that has weight and takes up space
What does liquid particles look like?
They are not too far or not too close, the particles can move around a little
What is the difference and similarities between a digital scale and a pan balance?
The digital scale is more accurate than the pan balance. You can use both of them to measure wight. The pan balance takes up much more time than the digital scale which is more efficient
What does it mean when something is magnetic? What material are magnetic?
Something that is magnetic means that something is attracted to another object. Usually metal is attracted to other metals. Such as on refrigerators
What is weight?
What is chemical change?
A change caused by chemical reaction that will change at least one substance to another
What do solid particles look like?
They are so close together and packed so they form hard objects
When a substance changes from a state of matter to another in a closed system, do the numbers of particles change? Is the matter the same or different?
No. It doesn't change because in a closed system, particles cannot escape. The mass will also not change because it is the same thing but it is just a different state of matter.
What is the difference between chemical change and physical change?
Chemical change means that it has a chemical reaction and at least one new substance is made. But, the physical change, changes the look but stays the same substance
What is physical change?
What is element?
More than one hundred substances that cannot be broken down into smaller substances
What shapes do they take up of?
Gas: Takes up the space of it's container.
Liquid: It takes up the shape of it's container.
Solid: Solid's take up the shape/space of it's defined space.
What are the four properties of light?
Opaque: Light cannot go through
Reflect: Light bounces off of an object
Translucent: Some light can go through an object
Transparent: Light can clearly go through an object
What are the differences between reversible and irreversible?
A material that usually does not easily transmit energy.
What is the meaning of conductor?
A material that can transmit a form of energy easily
What are examples of gases, liquids and solids?
Gases: Air, steam, some elements of the periodic table.
Liquid: Juice, milk, water, soda, matter that you can mostly drink.
Solid: Desk, anything you can touch
What is the contrast between conductors and insulators of heat? What kind of material is better?
Conductors: Lets heat pass easily
Insulator: It mostly does not let heat pass easily
Plastic is a better material because it is an insulator. It does not let heat pass easily unlike the metal cup which is a conductor that does let heat pass easily.
True or False? Liquid and gas particles are the same
False. Liquid particles are not as spread apart as gas particles but they both take the shape of its container