Chapter 2: Landforms
The following map [24] shows the World Time zones. Fill in the blanks using the map. The Earth is an ellipsoid that can be split into 360 meridians. There are <______1______>hours in a day. Dividing 360° by 24 hours we obtain the value <______2_____> degrees of longitude per hour. Now, from the Prime meridian (0°, or UTC line), moving eastward and counting to meridian 180° you have passed through <_____3_____> time zones. The time in this area is <_____4_____>hours later than the time at the prime meridian. Repeating this process westward, you find that the 180° meridian is number <_____5_____>. This means that the time at this location is <______6______> hours <______7______> (later or earlier? )than in the prime meridian.
blank1: 24 blank2: 15 blank3: 12 blank4: 12 blank5: 12 blank6: 12 blank7: earlier
To answer this question you may want to check your notes from my lecture about calculating the Earth's circumference or from the video above. Fill in the blanks. The angle measured by Eratosthenes of ______1______ degrees is also useful to calculate the circumference of the Earth. A circle has ______2____ degrees. The 7.2° measured represents a fraction of a circle that corresponds to _______3_____ (e.g. 1/3,1/4,etc). The distance between the two cities that were used in this calculation is_______4______ kilometers. We know that in 7.2° degrees the distance traveled along the circumference was 800 km. In 360° the distance should be_______5_____ kilometers. This is not bad compared to the actual measure of the meridional circumference measured with satellites that give us a distance of 40,074 km!
blank1: 7.2 blank2: 360 blank3: 1/50 blank4: 800 blank5: 40000
The setting and rise of the sun are an effect of Earth's <____1_____> around its imaginary<______2_____>. When the Earth's imaginary rotational <______3____> meets the surface, we call these locations<______4______>. As Earth is rotating it is also circling around the Sun. This is called <______5_____>. Earth's rotational axis is not perpendicular to its orbit. This rotational axis is <_____6______>, with one part leaning towards the Sun and another part leaning away. The result is that different parts of our planet get different amounts of heat depending on the time of the year. We call these changing patterns of weather conditions throughout the year the <_______7______>. The season when your part of the world leans towards the Sun is called <________8________>, the season when it is leaning away is called <______9_______>.
blank1: rotation blank2: axis blank3: axis blank4: poles blank5: revolution blank6: tilted blank7: seasons blank8: summer blank9: winter
Fill in the blanks. You are in a plane, about to take off from Atlanta to New Zealand. Taking advantage of the rotation of the Earth, the pilot will fly the plane toward the <______1_______>. As you cross time zones toward New Zealand, you will begin to gain hours, e.g. noon to 11 am. During the flight, you will pass through <______2______> time zones. Remember not to include Atlanta's time zone in your total, consider only the time zone boundaries you are crossing. Say your watch read 10 pm in Atlanta right before take off. You decide to adjust your watch to New Zealand time. To be on local New Zealand time, you adjust your watch to <_____3_____>.
blank1: west blank2: 7 blank3: 3 pm
After watching the video and studying the presented options, select the correct statements regarding time zones. (hint: more than one option is correct)
A - 24 different time zones were initially defined along 360 degrees longitude B - Time zones are not universally accepted. Each country picks its geographical time zones C - France uses 12 different time zones D - China has 5 different time zones but only one is used
Select the CORRECT options from the following (hint: more than one answer is correct, perhaps even all of them)
A - Geodesy provides clear evidence into Earth's shape as an oblate spheroid B - Magellan provided indisputable evidence of Earth's shape by circumnavigating the planet D - Mathematics allowed for accurate calculations of the Earth circumference even before our current era C - Throughout history thinkers and scientists have described near spherical Earth model
Select the CORRECT OPTION
C - Flat earthers claim that you can only trust your own observations but at the same time neglect to see the evidence that does not support their ideas
Using what you know about the direction of rotation of the Earth, indicate by clicking in the figure[12] which area in South America will experience the setting of the sun last.
Its the most west part of South America
