Sample Test 1...
1. Shown is our sun and the "2nd rock (Venus) and 3rd rock (us at A) from the sun" with the moon.
a) What is the "phase" of the moon in position shown?
b) What is the "phase" of the 2nd rock (v) in position shown as "seen" on earth?
c) If the earth is rotating counterclockwise about the sun, where (which letter) will earth be nearest (starting at A) after four complete lunar cycles?
2. Circle the letters of the correct statements below... Correct the incorrect statements.
a. According to Aristotle, the natural state of a body is to move at constant velocity.
b. According to Coepernicus, the earth is at the center of the universe.
c. According to Galileo a body's inertia causes it to move in a straight line at constant speed.
d. With the sun at the center, planets undergo retrograde motion.
3. In the spaces provided, write the appropriate letters and numbers which match the dates persons and events related to the development of the models of the atom. Ordering of ideas is more important.
|1807||a. Bohr||1. showed nucleus at center|
|1885||b. Heisenberg||2. analyzed spectrum of Hydrogen|
|1895||c. Dalton||3. assumed electron is a wave|
|1900||d. Thompson||4. showed atoms unite in whole units|
|1911||e. deBroglie||5. said light is a particle (photon)|
|1913||f. Planck||6. discovered the electron|
|1914||g. Balmer||7. equations worked for Hydrogen|
|1926||h. Rutherford||8. equation for current model|
4. Determine how many electrons could have the quantum numbers n = 4 and l = 2. Write out the possible sets. Each set would have 4 and 2 as first two numbers... what values of ml would be possible...
5. a) Suppose your car "gets" 25 miles/gallon when you drive 75 miles/hr. Combine these two facts to determine how many gallons you are using per hour (answer should be in gal/hr).
b) Now if you paid $1.25 /gal (125 cents/gal), how much are you paying per hour to drive the car? (Answer should be in cents/hr). Note that we are ignoring wear and tear on the car. Eventually there will be a slot in which you insert coins.
6. a) How many protons are there in one molecule of C6H12O6?
b) Put in order of decreasing molecular mass: Water, Carbon Dioxide, Oxygen molecule, Nitrogen molecule, Methane (CH4).
c) A mole of any substance means that there are about 6 x 1023 atoms/mole (or molecules/mole). In the periodic table handed out in class, the number given with the name is the number of grams in one mole of that atom. (ex... Germanium is 72.59 grams per mole of Boron atoms). What is the mass of one atom of Germanium?
7. a) Why do we have "seasons" in our earth year? Sketch a drawing which shows the earth relative to the sun when it is summer in the Northern Hemisphere. (Need to give information about earth's axis then).
b) Write down the gravitational force equation. Draw a picture of two masses and show what the labels in the equation mean in the picture. If you were to draw them closer together, what would happen to the size of the force?
8. a) On the simplifying assumption that oxygen and carbon atoms have the same weight, how much carbon dioxide gas is formed when 1 ton of coal burns (coal is nearly pure carbon)?
b) Give a good effect of having this carbon dioxide gas in the atmosphere ... and a bad effect.
9. a. What do the atoms in the first column of the periodic table have in common?
b. What atoms would a single atom in the first column of the periodic table tend to bond with to form a molecule? Why? Give three possible examples.
c. Balance the equation that occurs in a home heater. Is it endothermic or exothermic?
C H4 + O2 = C O2 + H2 O
10. Choose, in each part of the multiple choice questions, all the correct answers.
1. can only act between large masses
2. doesn't act when objects are at rest and touching.
3. makes the moon go around the earth.
4. causes the tides.
5. causes the earth to spin.
1. acts between any two masses.
2. is an attractive forces between unlike charges.
3. causes the electron to orbit the nucleus.
4. causes light
5. is the glue which holds solids together