HW 3

Identify the phases of the moon if at sunrise in the northern hemisphere the moon were in each of the following positions.

(a) near the eastern horizon - New Moon (b) high in the south - third quarter (c) in the southeast - waning crescent (d) southwest - waning gibbous

When it is autumn in Asia, what season is it in Antarctica?

spring

Based on what you learned about the moon, select all of the correct statements from the following list.

-During the new phase, no direct sunlight reaches the side of the moon facing Earth. -Since a full moon occurs when the moon is on the opposite side of Earth as the sun, it is only visible at night. -Quarter phases occur between the new and full phases.

Because Earth orbits the sun once per year, the sun appears to move through the sky once per year on a path we call the ecliptic.

-In the summer the sun is higher in the sky than in the winter. (Because of the tilt to the ecliptic, the sun is higher in the summer than in the winter.) -The ecliptic's tilt is caused by the tilt of Earth's rotational axis. (The ecliptic is tilted the same as Earth's tilt.) -In the summer the sun is above the horizon longer than in the winter. (There are more sunlight hours in the summer than in the winter.) -The constellations that lie along the ecliptic are those of the zodiac. (This is how the zodiac was defined.)

The motion of the planets observed from Earth is due to their oribits around the sun; some closer than Earth's, some farther away. Based on what you learned about the motions of the planets, select all of the correct statements from the following list.

-Some planets are too faint to be seen. -The planets are observed to move approximately along the ecliptic. -Planets closer to the sun than Earth can be seen only in the early evening or early morning

(a) Rank the lunar phases shown in the order that they appear during a month: waxing crescent, first quarter, waxing gibbous, full moon. (b) Rank the lunar phases in the order of the time of day the moon will rise in each phase: waxing crescent, first quarter, waxing gibbous, full moon. (c) Rank the lunar phases in the order of the amount of the night you will see the moon in each phase: waxing crescent, first quarter, waxing gibbous, full moon.

A - wax cres, first q, wax gibb, full b - wax cres, first, wax gibb, full c - full, wax gibb, first, wax cres

Why is the amount of solar heating less on a clear day in January at northern latitudes than on a clear day in July

Both the sun is above the horizon for less than 12 hours in January in the north and at low sun angles, the received sunlight is spread over a larger surface area.

Based on this figure, in what constellation is the sun on July 1 each year?

Gemini

A total eclipse of the sun was visible from Canada on July 10, 1972. When did the next eclipse with the same sun-moon-Earth geometry occur? (Select month, enter day and four-digit year. Consider leap years!) - From what part of earth was it total?

July 22, 1990 - norhtern europe and siberia

Identify the phases of the moon if on March 20 the moon were located at the position the sun is located on.

March 20 - New moon Sept. 22 - full moon June 22 - first quarter Dec 22 - third quarter

Why does the sun move relative to the stars as observed from Earth?

due to earth revolving around the sun

1. During a total eclipse of the moon, where is the moon located? 2. Which of the following describes the moon as it enters the penumbra? 3. Where does a lunar eclipse occur? 4. The moon does not always pass through the center of the shadows. Imagine that the orbit of the moon carries the moon through Earth's shadow so that only the lower half of the moon's disk passes through the umbral shadow. What is this eclipse called? 5. Imagine that the orbit of the moon carries the moon through Earth's shadow so that the moon's disk just misses the umbral shadow. What would this be called? 6. Imagine that the orbit of the moon carries the moon so far north that it does not enter Earth's penumbral shadow. What would this be called? 7. Why does the moon glow rusty red when it is totally eclipsed? 8. In this tutorial, you imagined watching a lunar eclipse. Through which of the following must the moon pass in order for a total lunar eclipse to occur?

1.in the umbra of Earth's shadow 2.It is dimmed slightly. 3.at the full moon 4.partial lunar eclipse 5.penumbral lunar eclipse 6.no eclipse would occur 7.all of these 8.the umbra of Earth's shadow

About how many days must elapse between first-quarter moon and the next full moon?

7

Based on what you learned about predicting eclipses, select all of the correct statements from the following list.

Eclipses do not occur every month because the moon is not always on the ecliptic during the necessary phases. Eclipses occur in a repeating pattern that astronomers can use to predict when they will occur.

If you could see the sun and stars during the daytime for several weeks, you would notice that the sun is which of the following?

moves slowly eastward relative to the stars

Based on what you learned about lunar eclipses, select all of the correct statements from the following list.

The moon appears red during a lunar eclipse due to scattering of sunlight by Earth's atmosphere. During a lunar eclipse, the moon passes into Earth's shadow.

Which statement below best describes the motion of the moon relative to the stars?

The moon moves Eastward relative to the stars about 13 degrees per day.

The postage stamp below shows a crescent moon in a starry night sky. What is wrong with the depiction of the moon in this picture?

The points of the moon's crescent always point away from the sun, so the sun should be visible in the sky.

Based on how the positions of the moon, sun, and Earth create the right conditions for total and partial solar eclipses to occur, select all of the correct statements from the following list

The sun's corona becomes visible during a solar eclipse. Because the moon's angular diameter in the sky as viewed from Earth changes, the moon passing between Earth and the sun may not entirely block the sun from view during a solar eclipse. During a solar eclipse, the moon casts a shadow on Earth.

Based on what you learned about astronomical influences on climate, select all of the correct statements from the following list.

We are living in a warm period between ice ages. There is convincing evidence of past climate change on Earth. An increase in Earth's axial tilt makes seasonal changes more severe.