Who Wants to Be a Science Millionaire
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Transcript of Who Wants to Be a Science Millionaire
WHO WANTS TO BE A SCIENCE
MILLIONAIRE
Chapter 2 Review
50 Points
The SI scale of measurement is
A. Celsius scale
B. Kelvin scale
C. Calorie scale
D. Fahrenheit scale
100 Points Energy can be defined as the capacity to
A. Exert force
B. Resist air resistance
C. Produce a chemical change
D. Do work
200 points
Electrolysis can be used in
A. Separation of water into oxygen and hydrogen
B. Tearing paper into simpler substances
C. Process of evaporation of saltwater D. None of the above
300 Points
Which is not an example of a heterogeneous mixture
A. Milk B. Paint C. Concrete D. Air
400 Points
Why are elements and compounds considered to be pure substances
A. Both are found on Periodic Table B. Both have unique physical and
chemical properties C. Both always have two or more
elements D. Both cannot be broken down further
500 Points
Law of Conservation of Matter states: A. Matter is not like energy B. Matter is always conserved in
chemical processes C. Matter is neither created or
destroyed in any process D. Matter is saved in small particles
1000 Points
When new properties are observed during a change of state are signs of
A. Chemical changes – identity of substance changes
B. New properties appear briefly C. No gas, heat or light occurs D. Physical changes – identity of
substance does not change
2000 Points
Which of the following are chemical changes?
A. Cracking an egg open B. Burning your pizza C. Water disappearing on a hot day D. Condensation or dew forming on the
grass in the morning
3000 Points
Which of the following is an example of a physical change?
A. Leaves turning colors in the fall B. A nail rusting C. Melting a piece of wax D. Burning a log
4000 Points Absolute Zero corresponds to what value?
A. 0 K
B. -273 K
C. 273 K
D. 0° C
5000 Points
Which of the following is an example of potential energy?
A. Flashlight battery B. Gasoline in your car C. A rock held at the top of the Empire
State Building D. All of the above
6000 Points
What are the symbols for the following elements? Potassium
Sodium
Copper
Lead Tin Mercury Iron Gold Silver
K Na Cu Pb Sn Hg Fe Au Ag
7000 Points
What are the three ways that energy and matter are related?
A. Need energy to move matter B. Matter and energy are not conserved C. Use temperature scales to measure
changes in matter D. Can convert matter into energy
8000 Points
If you had a 135.5 g sample of water and you pass an electric current through the sample, you find that only 16.3g of hydrogen gas is released. How much oxygen is then produced?
A. 67.75 g B. 109.2 g C. 151.8 g D. 119.2 g
9000 Points
How would you separate a mixture of iron filings, sand, salt, and water?
A. Use a magnet, filter, distillation B. Filter, use a magnet, crystallization C. Distill the mixture, filter, use a
magnet D. This mixture cannot be separated
10000 Points
What is the freezing point of water in both Celsius and Kelvin scale?
A. -273°C and 0 K B. 32° C and 305 K C. 0°C and 273 K D. 0°C and 0 K
25000 Points Describe how to remove the solid impurities from
water to attain pure water A. Filtration – use filter paper to collect the
impurities B. chromatography – each solid has unique
properties that can be separated by color C. Electrolysis – separate by using an electric
current D. Distillation – boiling of water – leaves solids
behind – collect the vapor and cool it to form liquid
50000 Points Wine contains alcohol, but foods cooked in
wine do not have alcohol. Why does this ‘seem’ to contradict the Law of Conservation of Matter?
A. Alcohol concentration is low in wine, so what little is cooked cannot be noticed
B. Alcohol evaporates quickly when heated
C. Cooking destroys the alcohol D. None of the above
100,000 Points
Define absolute zero. Has it been reached? A. Temp at which motion stops. Scientists
can only obtain this temp in the laboratory B. Temp at which motion slows, scientists
have attained this temp many times C. temp at which all motion stops. As atoms
get closer to absolute zero it is harder to remove any more heat
D. Temp at which motion slows, but is very difficult to attain due to the energy removal
250,000 Points
How many joules of energy are in one gallon of gasoline? (1 ml = 2.09 x 10-4 calories and 1 gallon is 3.744 L)
A. 3.27 Joules B. 2.37 Joules C. 2.09 x 10-4 Joules D. 4.184 Joules
500,000 Points
Kilocalories joules (if you burn 34 kilocalories per minute and you exercise for one hour and 30 minutes how many kilocalories will you burn? How many joules would that be equivalent too?
A. 34 kcal, 1.28 x 105 Joules B. 3060 kcal, 1.28 x 107 Joules C. 1000 kcal, 1.28 Joules D. 3400 kcal, 128 Joules
1000000 Points
Box has a dimension of 10 m x 2 m x 3 m and filled with water – density of water is 1000 kg/m3 – amount of calories needed to raise the temperature by 4 °C
A. 60 cal B. 240 cal C. 2400 cal D. 2.4 x 105 cal