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