this states that matter or mass is never created or destroyed only changed
100
Which two subatomic particles have almost the same mass?
What are protons and neutrons
100
Why is the density of Styrofoam so small?
Styrofoam is a mixed density or plastic and air.
100
Archimedes concept of buoyancy tells us what about the behavior of an object in water?
It will tell if the object will sink or float
100
If burning is a chemical reaction of a substance with oxygen, how could you make a wood log burn more quickly?
What is break the wood into smaller pieces, add more air, etc
200
wo substances that are evenly blended yet retain their own properties?
What is a Homogeneous mixture or Solution
200
What particles make up the mass of an atom and where are they located?
What are protons and neutrons. They are located in the nucleus
200
What is the density of a solid with a volume of 25 cm3 and a mass of 125 grams
What is 5 g/cm3
200
This is evidence that a chemical reaction has occured on the inside of an oak tree in the Fall.
What is the leaves change color. (a change in color is an indication that a chemical reaction has occured)
200
What process changes a solid to a gas?
What is sublimation
300
If 1,250 ml of water having a density of 1g/ml is frozen, the resulting ice will have what mass?
What is 1,250 grams of Ice
300
The atomic number provides what information about an electrically neutral atom?
What is the number of Protons (and electrons) in the atom
300
How will the mass and density of iron change if it is cooled?
Its mass will not change but its density will increase
300
What volume would an object have if it floats and has a mass of 27.24 grams?
what is 27.24cm3 or greater
300
When a lunar vehicle lands on the moon, how does its mass and weight change from when it is on the earth?
What is he mass remains the same but the weight is lower because lunar gravity is 1/6 that of earth
400
An element that has the same number of protons but a different number of neutrons?
What is an Isotope
400
When two different atoms bond chemically by sharing electrons, what is formed?
What is a Covalent Bond or Molecule.
400
Name the Three Causes of Density
What are Atomic Mass, Atomic Bonds, Mixed Density
400
What occurs when an object is put into a liquid having the same density?
What is the object will remain submerged in the middle of the liquid. Will not sink or float.
400
What is the relationship between the melting point and the freezing point of a substance?
It is equal
500
What is between the particles of matter.
What is Empty Space
500
This is the smallest part of a compound that can still be identified as that compound.
What is a molecule
500
As an object sinks deeper, the amount of water it displaces__?
What is Stays the same
500
If a block of ice with a mass of 100 g and a volume of 107 cm3 melts, the volume of the liquid water will be ____?
What is 100 cm3 or 100 ml
500
How would you find the number of neutrons an element has using the Periodic Table?
What is subtract the atomic number from the mass number.
example: Copper has a mass of 64 and an atomic number 29
Copper has 35 neutrons
(64 - 29 = 35)