Show:
Mix it Up!
Let's Get Physical
We Dig Sig Figs
Scientific Notation
Periodic Table
100
Determine whether the mixture is homogeneous or heterogeneous: Salt and water
What is a homogeneous mixture? (explanation: uniform composition)
100
Determine whether each is a physical or chemical change: Boiling Water
What is a physical change? (explanation: a change of state is a physical change; water is going from liquid to gas-still H20)
100
How many significant figures does this number have? 0.00000007
What is 1 significant figure? (explanation: leading zeros are never significant)
100
Put this number into Scientific Notation: 30,000
What is 3 x 10^4? (explanation: moving the decimal towards the left= a positive exponent)
100
How is the Periodic Table primarily organized?
What is by increasing atomic number? (also by group elements, like metals, nonmetals, metalloids, etc)
200
Determine whether the mixture is homogeneous or heterogeneous: Greek Salad
What is a heterogeneous mixture? (explanation: non-uniform composition)
200
Determine whether each is a physical or chemical change: Food Molding
What is a chemical change? (explanation: molding is an example of a chemical reaction)
200
How many significant figures does this number have? 100,005
What is 6 significant figures? (explanation: zeros between significant figures are significant)
200
Put this number into Scientific Notation: .000000073
What is 7.3 x 10^-8? (explanation: moving the decimal to the right= a negative exponent)
200
What are the four main physical properties of metals?
What is 1) efficient conduction of heat and electricity, 2) malleability, 3) ductility, and 4) lustrous appearance?
300
Determine whether the mixture is homogeneous or heterogeneous: Gasoline
What is homogeneous mixture? (explanation: uniform composition)
300
Determine whether each is a physical or chemical change: Cutting up Vegetables
What is a physical change? (explanation: Shape and size are physical properties; the vegetables are still vegetables, just different shapes and sizes)
300
How many significant figures does this number have? 0.00040390
What is 5 significant figures? (explanation: leading zeros are never significant, and trailing zeros are significant if a decimal is present)
300
Put this number into Scientific Notation: 804,000
What is 8.04 x 10^5? (explanation: moving the decimal to the left= a positive exponent; must include all sig figs, which are 3 in this case)
300
Do nonmetals tend to gain or lose electrons to form an ion?
What is gain electrons? (explanation: nonmetals have more valence electrons in their shell than metals, therefore it is easier for them to gain electrons to fill their shell rather than lose them)
400
Determine whether the mixture is homogeneous or heterogeneous: Sand and water
What is a heterogeneous mixture? (explanation: non-uniform composition)
400
Determine whether each is a physical or chemical change: A Bicycle Rusting
What is a chemical change? (explanation: rusting is an example of a chemical reaction)
400
Round the answer to the correct amount of significant figures or decimal places. 10.5632 + 9.41=
What is 19.97? (explanation: in addition and subtraction, we round to the smallest amount of decimals from the numbers in the question, which in this case, is two. Therefore, there should be two decimal places in our answer.)
400
Put the number into Scientific Notation and two Significant Figures: 8,790,000
What is 8.8 x 10^6? (explanation: the answer must stop at 7, and since 9 is greater than 5, we round 7 up to 8)
400
What does the atomic number represent?
What is the number of protons the element has (and also the number of electrons in the element's neutral state)?
500
Determine whether the mixture is homogeneous or heterogeneous: Air
What is a homogeneous mixture? (explanation: uniform composition made up of 2 or more substances; cannot see differences between substances)
500
Determine whether each is a physical or chemical change: Plants undergoing Photosynthesis
What is a chemical change? (explanation: photosynthesis is an example of a chemical reaction)
500
Round the answer to the correct amount of significant figures or decimal places. 7.0305 x 4.9=
What is 34? (explanation: in multiplication and division, we round by the smallest amount of significant figures from the numbers in the question, which in this case, is two. Therefore, there should be two "sig figs" in our answer.)
500
Put the number into Scientific Notation and three Significant Figures: .0006325
What is 6.32 x 10^-4? (explanation: we must stop at 2; since the next digit is exactly 5 and since 2 is an even number, we truncate the 5, leaving us with 6.32)
500
How many valence electrons do the Noble Gases have?
What is 8 valence electrons? (explanation: Noble Gases are already in the perfect state of having 8 valence electrons in their shells)