questions
questions
questions
questions
questions
100
What is the SI unit for mass of a substance?
Kilogram
100
What are boiling and freezing points examples of?
physical properties
100
What is the relationship between the volume and the oreessure of a gas?
They are both inversely proportional and Boyles Law`
100
~What change of state is exothermic?
Freezing
100
Which state is present at 30 degrees celcius?
The liquid state.
200
What needs to happen to speed up or slow down the particles?
to be sped up they need to be heated to get more energy to be slowed down they need to be cooled to lose energy
200
What is a Physical Change?
Affecs 1 or more physical properties of a substance
200
Why do liquids flow?
the particles move fast enough to over come the attraction between them, they slide
200
During what cahnge do atoms or molecules become more ordered?
condensation
200
What cant volume of a liquid be measure in?
Grams
300
Name 6 signsof a chemical change.
~gas is produced ~Solid is formed ~Substance dissapears ~Temperature change ~odor change ~Permanent color change
300
What is Charles Law?
~ fixed amount of gas ~constant pressure ~they change in the same direction
300
What is Boyles Law?
~fixed amount of gas ~constant temperature ~they are inversely related
300
what are the 5 physical properties in matter
thermal conductivity ductility mallebility solubility density
300
What are the boiling and melting points?
Boiling is 80 degrees celcius and Melting is 20 degrees celcius
400
Name 4 examples of chemical changes.
~freeze water and turn it into ice ~Icecream melts ~patio cracks ~sanding wood
400
What is a chemical change?
When 1 or more substances change into new substances that have new and different properties.
400
how do you know if an object will float in the water based on its density
if it has a low density
400
What do Charles and Boyles Laws explain?
Gas Behavior Laws
400
How do you measure an irregular solid?
Your measure the amout of water displaced and that is equal to the volume of the object.
500
What are the chemical properties?
Reactivity and flammability
500
Where is the densest layer in a graduated cylinder
What is the bottom
500
What is the difference between mass and weight?
Mass is the amount of matter in an object and weight is the amount of gravitationsal force exerted on the object
500
how do you calculate density
Density equals mass over volume
500
How do atoms and molecules interact?
They are in motion and bump into eachother
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