In the orbit diagram, use the position where the Northern Hemisphere leans most toward the Sun. Which season begins in New York at that position?

The orbit diagram includes a position where the Northern Hemisphere leans away from the Sun. Which season begins in New York at that position?

Find the orbit position where neither hemisphere leans toward the Sun and Northern Hemisphere daylight is starting to increase. Which season begins in New York?

At the orbit position where neither hemisphere leans toward the Sun and Northern Hemisphere daylight is starting to decrease, which season begins in New York?

Use the orbit diagram position where the South Pole points most toward the Sun. Which season begins in New York then?

In the orbit diagram, choose the position where the South Pole points most away from the Sun. Which season begins in New York at that position?

At one orbit position, the Sun's vertical rays strike the Tropic of Cancer at 23.5° N. Which season begins in the Northern Hemisphere?

At one orbit position, the Sun's vertical rays strike the Tropic of Capricorn at 23.5° S. Which season begins in the Northern Hemisphere?

Use the orbit diagram position where the day-night boundary passes through both poles and Northern Hemisphere spring follows. Which date is closest?

Use the orbit diagram position where the day-night boundary passes through both poles and Northern Hemisphere autumn follows. Which date is closest?

In the orbit diagram, find the position where the North Pole stays in daylight for 24 hours. Which Northern Hemisphere season begins there?

At the orbit position where the North Pole stays in darkness for 24 hours, which Northern Hemisphere season begins?

In the mid-latitude sun path diagram, which date does arc A best represent?

In the sun path diagram, which date does arc C best represent?

In the sun path diagram, which dates could arc B represent?

For a 35° S site, which date does arc A in the sun path diagram best represent?

For a 35° S site, which date does arc C in the sun path diagram best represent?

A New York sun path diagram shows the Sun rising north of east, taking the longest arc, and setting north of west. Which date fits the diagram?

A New York sun path diagram shows the Sun rising south of east, taking the shortest arc, and setting south of west. Which date fits the diagram?

In the sun path diagram, the middle arc rises due east and sets due west. Which two calendar dates have this path at mid-latitudes?

At 40° N, the sun path diagram's highest arc has a noon altitude of 73.5°. Which date is represented by that arc?

At 40° N, the sun path diagram's lowest arc has a noon altitude of 26.5°. Which date is represented by that arc?

Earth is nearest the Sun in early January, yet Chicago is usually cold then. What does this show about the cause of seasons?

If Earth-Sun distance caused seasons, what pattern would both hemispheres have at the same time?

Earth is farthest from the Sun in early July, but New York has summer then. Which explanation fits best?

On the same December day, Florida has winter while Argentina has summer. Which factor explains the difference?

Suppose Earth's orbit became almost perfectly circular but its 23.5° axial tilt stayed the same. What would happen to seasons?

A student says, "Summer is warmer because Earth is closer to the Sun." Which correction is most accurate for New York?

The Arctic Circle can have 24 hours of daylight near June 21. What causes that all-day sunlight?

In January, Earth is near perihelion while Australia has summer and Canada has winter. How does the noon Sun in Australia compare with the noon Sun in Canada that month?

The sun path diagram is for a mid-latitude site. About how much daylight does that site receive on the date shown?

Use the orbit diagram position where the North Pole tilts toward the Sun. What daylight duration occurs at the Arctic Circle?

The New York sun path diagram shows the longest daily arc. What does that mean for daylight duration there?

The New York sun path diagram shows the shortest daily arc. What does that mean for daylight duration there?

A sun path rises due east and sets due west at a mid-latitude site. What daylight duration should the site have?

From the March equinox to the June solstice at 40° N, the sun path gets longer and higher. What happens to daylight duration?

On the December solstice, what daylight pattern occurs at the Antarctic Circle?

At 50° N, what happens to daylight duration from the September equinox to the December solstice?

At 42° N, the noon Sun is 71.5° high on one date and 24.5° high on another. Which pair of dates matches those altitudes?

The diagram shows the Sun's path across the sky at 40° N on three dates. On which date does the Sun follow path A?

The diagram shows noon Sun altitudes for the labeled location. Which date matches the lowest noon altitude?

At 45° N, which date has the greater noon Sun altitude: June 21 or December 21?

At 40° N on an equinox, what is the noon Sun altitude?

At 30° N, the noon Sun is 83.5° on June 21 and 60° on an equinox. How much higher is it on June 21?

At 40° N on the December solstice, what noon Sun altitude should the diagram show?

In late December, an Antarctica field team reports the Sun above the horizon all day. Which season is it there, and why?

In June, Australia has its shortest days while New York has long days. What season is beginning in Australia?

In January, Chile has summer while Canada has winter. Which explanation accounts for the opposite seasons?

At the September equinox, New York enters autumn. What season begins at the same time in South Africa?

Use the orbit diagram position where New York begins summer. What season begins then in Argentina?