This is the main way that one can tell a physical change in a substance.
What is: use your 5 senses?
100
These 3 are typical examples of a chemical change.
What is rust, bubbles (reacting with Oxygen), burning?
100
The definition of soluable.
What is when one substance is dissolved in another..ex: sugar is soluable in water and sand is not?
100
This is the type of change that describes flammibility?
What is a chemical change?
200
This is what does not change in a substance during a physical change .
What is: the substance does not change its identity?
200
The reason why rusting iron is a a chemical and not a physical change.
What is the iron changes and can not be changed back, a new substance is formed?
200
This is how you find the volume of an irregular shaped solid.
hint: Think of the experiment done with the clay in class.
What is water displacement?
200
The description of energy that particles in a solid would have versus a description of energy that particles in a gas would have.
What is particles in a solid have the least energy then if a liquid were there there would be a little more energy and then finally the particles in a gas would have the most energy of ALL states of matter?
300
True / False: Mass is conserved in both physical and chemical changes.
What is True?
300
A vitamin tablet was put into water, it began to bubble and then it dissappeared, this is the type of change witnessed.
What is a chemical change?
300
These are the 2 things that are needed to find the density. Hint: think of the triangle we used to help with these problems during class review.
What is mass / volume?
300
This is the description of why we did the glow stick lab.
What is explaining the Law of Conservation of Mass?
400
These are 4 examples of physical properties.
What is density, shape, color, mass? (also could have: melting point, solubility)
400
These are the 4 states of matter.
What is solid, liquid, gas and plasma?
400
This is the standard form of the number: 6.8 x 10^6.
What is 6800000?
400
This state of matter has a definate shape and volume and......the second state of matter has a definate volume but no definate shape.
What is a solid, what is a liquid?
400
Explain the Law of Conservation of Energy.
What is mass can not be created or destroyed, total mass before and after a reaction is the same?
500
These are 3 examples of physical changes.
What is melting, evaporating, and solidifying (water turning to ice)?
500
This is the standard number for 8.45 x 10^-5.
What is .0000845?
500
This is the way that you would put 7,860,000,000Km into scientific notation.
What is 7.8 x 10^9 Km?
500
This is the density of a substance with 50g mass and a volume of 100mL.
What is .5 g/mL?
500
This is the volume of a substance with a mass of 75g and a density of 5g/mL.