Day/Night and Seasons

Equinox

"Equal night" Daytime hours (sun's up) and Nighttime hours (sun's down) are equal in length (12 hours each). Vernal equinox (spring-March); Autumnal equinox (fall-September)

Why would someone in location B experience sunrise and moonrise before someone at location A? https://photos.app.goo.gl/6ajJFSDFqnsSJmjS9

Because Location B is WEST of Location A.

Which direction does Earth rotate?

Counterclockwise The sun appears to rise in the East and set in the West. People in Europe experience sunrise and moonrise before us.

Winter Solstice

December; the shortest day of the year in the Northern Hemisphere. December: the longest day of the year in the Southern Hemisphere.

What causes the seasons?

Earth is a sphere! Tilt & Revolution Explain how Earth receives the Sun's rays differently (indirect and direct rays).

Spring and Fall in the Northern Hemisphere

Earth is positioned in a neutral position to the Sun. ● Temperatures are moderate. ● Sunlight (distributed evenly)

What causes Day and Night?

Earth's counterclockwise rotation on its axis, about 24 hrs.

True or False. The Earth is positioned closer to the Sun during the summer months.

FALSE - actually the Earth is closer to the Sun during the winter months due to its slightly elliptical orbit.

How do the daylight hours vary throughout the year in St. Louis?

From January to June the daylight hours increase. June 21st is the day with the most daylight hours. From June to December the daylight hours decrease. December 21st is the day with the least daylight hours.

Summer Solstice

June; the longest day of the year in the Northern Hemisphere. June: the shortest day of the year in the Southern Hemisphere.

How would daylight hours vary for Location A throughout the year? https://photos.app.goo.gl/AAgkr97pkYx5DM8c7

Location A will experience its longest day during June and its shortest day during December.

Would location B have its' longest or shortest days during December? https://photos.app.goo.gl/AAgkr97pkYx5DM8c7

Longest

Revolution

Movement of one object around another Example: Earth revolves around the Sun. The moon revolves around the Earth.

Is this statement correct? I think that the Earth moving around the sun once every 24 hours causes day and night, and the stars change position in the night sky.

NO

Is this statement correct? I think that when it is daytime above the equator, it is nighttime below the equator.

NO

Winter in the Northern Hemisphere

Northern Hemisphere tilted away from the Sun. ● Shorter days ● Cooler temperatures ● Indirect Sunlight (sunlight is spread out)

Summer in the Northern Hemisphere

Northern Hemisphere tilted toward the Sun. ● Longer days ● Warmer temperatures ● Direct Sunlight (more concentrated)

Rotation

Spinning on an axis

True or False. The Earth's tilt does not change throughout the year.

TRUE - the angle of tilt is 23.5 degrees remains throughout the year. The axis always points in the same direction.

True or False. The Earth's tilt affects the angle at which the Sun's rays strike earth.

TRUE- the tilt causes the sunlight to spread out making less concentrated in one area..

Day and night are caused by -The Earth's counterclockwise rotation on its' own axis -The Earth's clockwise rotation on its' own axis -The Earth's counterclockwise revolution around the Sun -The Earth's clockwise revolution around the Sun

The Earth's counterclockwise rotation on its' own axis.

What evidence do we have that suggest the Earth rotates counterclockwise?

The Sun rises in the East and sets in the West.

Which of following is NOT a factor that cause the yearly sunrise and sunset patterns for an area: -The location of the moon -Latitude (Nearness to the Equator) -The tilt of the Earth's axis

The location of the moon

Solstice

The longest and shortest daylight hours of the year.

Which statement describes summer in the Northern Hemisphere? -The Earth is positioned closer to the Sun in it's yearly orbit. -The north pole is tilted toward the Sun. -The north pole is tilted away from the Sun.

The north pole is tilted toward the Sun.

Which of the following is NOT a reason for the seasons on Earth? -Earth's revolution around the Sun. -The tilt of Earth's axis of rotation. -The varying amount of sunspot activity throughout the year.

The varying amount of sunspot activity throughout the year.

A city experiences longer amounts of daylight in December with an average temps of 70-80 F. Where is this city located?

This city must be located in the Southern Hemisphere (summer in December).

A city experiences shorter amounts of daylight in June, longer shadows, and average temperatures of 30-40 degrees F during the month. What can you infer about this city?

This city must be located in the southern hemisphere.

True or False: When the northern hemisphere experiences summer, the southern hemisphere experiences winter.

True

Why do the SUN, MOON, AND STARS appear to rise in the east and set in the west on planet Earth?

We call this apparent motion. The counter-clockwise spinning of Earth every 24 hours creates this "optical illusion" of a sunrise/sunset; moonrise/moonset; AND constellations slowing changing position across the night sky.

How does the tilt of the Earth affect the sunlight intensity for the Northern Hemisphere? (direct or indirect sunlight? longer or shorter days? cooler or warmer temperatures?)

When the north pole is tilted away from the Sun, the Earth receives indirect sunlight causing shorter days and cooler temperatures.

Is this statement correct? I think that the Earth spinning on its' axis once every 24 hours causes day and night, and the stars to change position in the night sky.

YES