Where on Earth are the daily solar altitudes higher and lower than Endicott?

In your notebooks, write RELATIONSHIPS between variables we tested

CAUSE FIRST EFFECT SECOND EVIDENCE

As you increase the time the light is on,

You __________ the temp. of the air.

Time “0” is lowest valueTemp at T-0 =

Temp @ T-20 =

As you decrease the angle from 90o to 30o

You __________ the maximum temp. of the air.

As you increase the angle from 30o to 90o

You __________ the rate of temp change.

As you move from the poles to the equator at a

lower latitude,

You __________ the angle of insolation

As you move from theequator to the poles at a

higher latitude,

You __________ the maximum temp. of the air.

TEMP

INCREASE ANGLE

DECREASE ANGLE

RATE of TEMP CHANGE

INCREASE LATITUDE

ANGLE INSOLATIONDECREASE LATITUDE

MAX TEMP

MAX TEMP

DATA from LABINCREASE TIME

WHICH RELATIONS ARE DIRECT? Which are INVERSE?

CAUSE FIRST EFFECT SECOND EVIDENCE

As you increase the time the light is on,

You increase the temp. of the air.

Time “0” is lowest valueTemp at T-0 =

Temp @ T-16 =

As you decrease the angle from 90o to 30o

You decrease the maximum temp. of the air.

90o angle max temp =___ 30o angle max temp =___

As you increase the angle from 30o to 90o

You increase the rate of temp change.

90o angle rate =_____ 30o angle rate =_____

As you move from the poles to the equator at a

lower latitude (decrease latitude),

You increase the angle of insolation

COLDER at Poles (indirect)Warmer at Equator (direct)

(inferred from temp and angle data)

As you move from theequator to the poles at a

higher latitude (increase latitude),

You decrease the maximum temp. of the air.

COLDER at Poles (indirect)Warmer at Equator (direct)

(inferred from temp and angle data)

Before we get started, let’s draw a picture in our notebooks to show us what the dome model used in the

SUN’s PATH LAB is trying to show us.

What does solar altitude and intensity look like in Endicott in 3-D and how does it compare to other

places around the world?

Sun’s Path Lab … on the diagram you should be able to

In the title, add ENDICOTT at LATITUDE 42oN so you remember this is very specific data. Eventually we will branch out to other places on Earth!

Label the celestial meridian and the zenith for the observer

Label each path of the sun with the season name, range of starting dates, and whether it is a solstice or equinox.

Label each solar noon with its maximum solar altitude angle.

For each path, label sunrise, sunset, and solar noon and include an arrow for the direction it travels on that path. Then label the compass direction (azimuth and cardinal) for each if you are the observer in Endicott.

For each path, list the day/night length.

For each path label the locations of minimum (twice) and maximum solar intensity (once) during the day.

Label the path with the maximum solar intensity and minimum solar intensity.

For each season, draw in the observer’s relative shadow length at solar noon in the correct direction

OBSERVER

APPARENT PATH OF SUN IN THE SKY IN

THE NORTHERN HEMISPHERE

This model should make more sense now!

What did the lab graph show us aboutSOLAR ALTITUDE, DIAMETER, & DAY

LENGTH relate to each other?

YOUR GRAPHS are PROBABLY the easiest way to SEE the RELATIONSHIPS.

Let’s create a tilted Earth Model

• Draw in and label equator, N. Pole, and S. Pole

• Draw in Tropic of Cancer (23.5oN latitude)

• Draw in Tropic of Capricorn (23.5oS latitude)

• Draw in Arctic Circle (66oN latitude)

• Draw in Antarctic Circle (66oS latitude)

How are SEASONS related to the angle of insolation?

https://www.youtube.com/watch?v=Pgq0LThW7QA

https://www.youtube.com/watch?v=eUsWUiVCq5U

Seasons affect

temperatures on Earth

because of the angle of

insolation

During different seasons, locations on Earth receive sunlight at different angles

Where & when does sun reach zenith (90o)?

• June 20-22 solstice at Tropic of Cancer (23.5o N). That’s North Hemi summer

• Sept 20-23 equinox at equator (0o). That’s North Hemi fall

• Dec 20-22 solstice at Tropic of Capricorn (23.5o S). That’s South Hemi summer.

• Mar 20-22 equinox at equator (0o). That’s North Hemi spring

What about other places on earth?

Where are the times of day(sunrise, solar noon, and sunset) for each season?