Warm-up : Practice Affix Quiz

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Warm-upWarm-up: : Practice Affix QuizPractice Affix QuizFor each definition, write the correct affix.For each definition, write the correct affix.

1.1. equal, a horse equal, a horse __________________________2.2. the sunthe sun __________________________

For each affix, write a word that contains that For each affix, write a word that contains that affix and use it in a sentence.affix and use it in a sentence.

3. Uni-3. Uni- ________________________________________4. Tele- 4. Tele- ________________________________________

Warm-upWarm-up: : Practice Affix QuizPractice Affix QuizFor each definition, write the correct affix.For each definition, write the correct affix.

1.1. equal, a horse equal, a horse ______equiequi______2.2. the sunthe sun ______solsol ____ ____

For each affix, write a word that contains that For each affix, write a word that contains that affix and use it in a sentence.affix and use it in a sentence.

3. Uni-3. Uni-There are many galaxies in the There are many galaxies in the universeuniverse..4. Tele-4. Tele-You can look at the stars up close using You can look at the stars up close using

a a telescopetelescope..

Warm-up:Warm-up: Today, what season is it in…Today, what season is it in…

1. Texas?

2. Australia?

3. China?

4. Brazil?

The Reason for the The Reason for the SeasonsSeasons

Earth is Earth is tiltedtilted!!

XLike this!

How Sunlight hits EarthHow Sunlight hits Earth There are 2 different types of light There are 2 different types of light

rays:rays:

• Direct rays: hit aDirect rays: hit a flat flat surfacesurface

• Indirect rays: hit at anIndirect rays: hit at an angle angle ((slanted slanted surface)surface)

MINI LAB: MINI LAB: Direct vs. Indirect Rays Direct vs. Indirect Rays

Did you change the amount of light Did you change the amount of light coming from the flashlight?coming from the flashlight?

Which rays cover more area (Which rays cover more area (light light more squaresmore squares)?)?

Which rays are stronger (Which rays are stronger (brighterbrighter)?)?

MINI LAB: MINI LAB: Direct vs. Indirect Rays Direct vs. Indirect Rays

Direct and indirect rays both provide Direct and indirect rays both provide the the samesame amount of amount of solar energysolar energy..

Direct rays Direct rays focusfocus the heat on a the heat on a smallersmaller area. area.

Indirect rays Indirect rays spread outspread out the heat the heat over a over a largerlarger area. area.

How Sunlight Hits EarthHow Sunlight Hits Earth If Earth wasn’t tilted, we would get If Earth wasn’t tilted, we would get

the same amount of sunlight all year the same amount of sunlight all year longlong

How Sunlight Hits EarthHow Sunlight Hits Earth BUT…because Earth IS tilted, the BUT…because Earth IS tilted, the

amount of sunlight we get changes amount of sunlight we get changes as we revolve around the sunas we revolve around the sun

The type of rays we get depends The type of rays we get depends on which on which hemispherehemisphere is tilted more is tilted more

towards the sun.towards the sun. NorthernNorthern Hemisphere tilted toward Hemisphere tilted toward

the sun:the sun:

• N.H. gets N.H. gets moremore direct rays ( direct rays (warmerwarmer))• S.H. gets S.H. gets lessless direct rays ( direct rays (coolercooler))

The type of rays we get depends The type of rays we get depends on which on which hemispherehemisphere is tilted more is tilted more

towards the sun.towards the sun. SouthernSouthern Hemisphere tilted towards Hemisphere tilted towards

the sun:the sun:

• N.H. gets N.H. gets lessless direct rays ( direct rays (coolercooler))• S.H. gets S.H. gets moremore direct rays ( direct rays (warmerwarmer))

Earth’s tilt also causes the Earth’s tilt also causes the hours hours of daylightof daylight to change throughout to change throughout

the year.the year. The hemisphere that is tilted The hemisphere that is tilted towardtoward

the sun gets the sun gets moremore hours of daylight. hours of daylight.

Earth’s tilt also causes the Earth’s tilt also causes the hours hours of daylightof daylight to change throughout to change throughout

the year.the year.

More direct rays + more hours of daylight =More direct rays + more hours of daylight =warmer warmer temperaturestemperatures (summer!) (summer!)

Earth’s tilt also causes the hours of Earth’s tilt also causes the hours of daylight to change throughout the daylight to change throughout the

year.year.

Less direct rays + less hours of daylight =Less direct rays + less hours of daylight =cooler cooler temperaturestemperatures (winter!) (winter!)

Earth’s Orbit Around the SunEarth’s Orbit Around the Sun

Winter SolsticeDecember 21

Southern Hemisphere is tilted toward the sunNorthern Hem. experiences: -shortest day of the year (least hours of daylight)-least direct rays of year

Winter

Vernal (Spring) EquinoxMarch 21

Winter

Neither Hemisphere is tilted toward the sunNorthern Hem. experiences: -equal length of day & night-same amount of direct rays as Southern Hemisphere

Vernal EquinoxMarch 21

g Winter

Summer SolsticeJune 21

Northern Hemisphere is tilted toward the sunNorthern Hem. experiences: -longest day of the year (most hours of daylight)-most direct rays of year

g Winter

Summer

g Winter

Summer

Autumnal (Fall) Equinox

September 23

Neither Hemisphere is tilted toward the sunNorthern Hem. experiences: -equal length of day & night-same amount of direct rays as Southern Hemisphere

g Winter

SummerAutumnal Equinox

September 23Autumn

Warm-up : Practice Affix Quiz

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