8.9.3-Eclipses & TIdes

​NOTES TO PRINT

Chapter 9-Sun-Earth-Moon System
Lesson 8.9.3-Eclipses & Tides Your Name

Essential Questions:

1. What is a solar eclipse

2. What is a lunar eclipse?

3. How does the sun and moon affect Earth's oceans?

Be sure to answer the questions as you complete the quiz. Turn in with your MASTERY SCORE (80% minimum or REDO) at the end.

1. Lesson 8.9.3-Eclipses & Tides

Essential Questions

1. What is a solar eclipse?
   

Eclipses

​Solar Eclipse

​The moon blocks the sun, casting a small shadow onto Earth

Multiple Choice

When are shadows the shortest?

• morning

• evening

• night

• noon

Multiple Choice

Materials that completely block the light are called?

• transparent materials

• opaque materials

• light materials

• none of the above

Multiple Choice

When an object moves closer to a light source, its shadow _____________

• stays the same size

• changes shape

• gets bigger

• gets smaller

Multiple Choice

When the sun gets higher in the sky, shadows get _____________

• lighter

• shorter

• longer

• darker

Multiple Choice

When light hits a barrier that is solid/opaque what is usually created?

• a hot object

• a shadow

• nothing

Multiple Choice

When light hits a barrier that is solid/opaque what is usually created?

• a hot object

• a shadow

• nothing

Total solar eclipses happen when the New Moon comes between the Sun and Earth and casts the darkest part of its shadow, the umbra, on Earth.

During a total eclipse of the Sun, the Moon covers the entire disk of the Sun. In partial and annular solar eclipses, the Moon blocks only a part of the Sun.

Multiple Choice

You have to be in or near the path of totality to see a solar eclipse.

• True

• False

Multiple Choice

How often does Earth experience a solar eclipse?

• one every 1-1/2 years

• one every 5 years

• one every 10 years

• one every 20 years

Multiple Choice

True or False? When the Moon travels between between the Sun and the Earth, blocking the Sun's light from the Earth it is a SOLAR eclipse.

• True

• False

Multiple Choice

Which is a TRUE statement about a total solar eclipse?

• A partial solar eclipse and total lunar eclipse are the same thing.

• A total solar eclipse cannot be viewed at anytime, anywhere on Earth.

• A total solar eclipse can last several hours in the same location.

• A total solar eclipse only lasts a few minutes, at any one specific location, because of the rapid movement of the Moon and the Earth in their orbits.

Multiple Choice

During what moon phase does a solar eclipse occur?

• new moon

• full moon

• waxing gibbous

• first quarter

Multiple Choice

The ________________ is the inner, darkest part of the Moon’s or Earth’s shadow where the Sun is blocked, casting a shadow over the respective body.

• umbra

• penumbra

• antumbra

Multiple Choice

Which statement best describes a total solar eclipse?

• A total solar eclipse in which the entire Sun, with the exception of the corona, is blocked by the moon.

• There is no such thing as a solar eclipse.

• A total solar eclipse occurs when the Earth casts a shadow on the Moon.

• A solar eclipse can last up to 27.3 days.

Multiple Choice

Which term best describes a partial solar eclipse?

• The lighter, outer part of the shadow cast by a body, such as the Moon during a solar eclipse or Earth during a lunar eclipse.

• The movement of the Earth around the Sun.

• A solar eclipse in which the new moon temporarily blocks part of the Sun as viewed from Earth.

• The tile of the Earth on its axis.

Multiple Choice

Which term best describes a partial solar eclipse?

• The lighter, outer part of the shadow cast by a body, such as the Moon during a solar eclipse or Earth during a lunar eclipse.

• The movement of the Earth around the Sun.

• A solar eclipse in which the new moon temporarily blocks part of the Sun as viewed from Earth.

• The tile of the Earth on its axis.

1. Lesson 8.9.3-Eclipses & Tides

Essential Questions

2. What is a lunar eclipse?
   

A lunar eclipse occurs when the Moon moves into the Earth's shadow.

This can occur only when the Sun, Earth, and Moon are exactly or very closely aligned with Earth between the other two, and only on the night of a full moon.

Multiple Choice

What type of eclipse is this

• Lunar eclipse

• Solar eclipse

• Sun eclipse

• Moon eclipse

Multiple Choice

In order to have an eclipse, the Moon, Sun and Earth have to be?

• Below each other
• Above each other
• In alignment

Multiple Choice

When the Earth's shadow falls on the moon, the shadow causes what to happen?

• Lunar eclipse
• Solar eclipse
• Partial eclipse

Multiple Choice

Which type of eclipse occurs when the Earth comes directly between the Sun and Moon?

• Lunar eclipse
• Solar eclipse

Multiple Choice

True or False. Everyone on the night side of the Earth can see a lunar eclipse if is occurring.

• True

• False

Multiple Choice

When the Earth casts a shadow on the Moon is a ...

• lunar eclipse

• solar eclipse

• solar revolution

• lunar phase

Multiple Choice

When the Earth casts a shadow on the Moon is a ...

• lunar eclipse

• solar eclipse

• solar revolution

• lunar phase

Eclipses: Review

• Umbra vs Penumbra: The umbra is the darker part of the shadow during an eclipse, the penumbra is lighter.

  Eclipse Frequency:

  • Solar eclipses occur roughly every 18 months.

  • Lunar eclipses occur about 3 times a year.
    
    

  Total Solar Eclipse: To experience a total solar eclipse, you must be under the darkest part of the shadow - the umbra.

Multiple Choice

Which part of the shadow is the darkest during an eclipse?

• Umbra

• Penumbra

Multiple Choice

Which part of the shadow must you be under to experience a total solar eclipse?

• Umbra

• Penumbra

Multiple Choice

Why don't we have a lunar eclipse every month?

• Because the moon's orbit around Earth is tilted

• Because the Earth is not always between the sun and moon

• Because the moon's orbit around Earth is circular

• Because the moon is not always in the Earth's shadow

Lunar Eclipse Trivia

Did you know:

Lunar eclipses do not
occur every month
because the moon's
orbit around Earth is tilted.


This means that most of the time, the moon is either above or below Earth's shadow. Only when the moon aligns perfectly with Earth and the sun do we get an eclipse!

​Solar Eclipse

​The moon blocks the sun, casting a small shadow onto Earth

Reorder

What order must these be in for a solar eclipse to occur? (start with Earth)

• Earth

• Moon

• Sun

1

2

3

• 1
• 2
• 3

Draw

Draw the order of the Sun, Earth, and moon during a solar eclipse.

​The Moon's Orbit

The moon orbits at an angle, so it does not pass between the Earth and sun each month. When it does, however, it causes an eclipse!
(It also has an elliptical orbit!)

This is the lighter edges of the shadow. It is less dark.

Penumbra

This is the darkest part,
in the very center of the shadow.

​Umbra

Types of Shadows

Visibility

Not everyone can see every solar eclipse -
only those who are under the shadow.

Did you know...

Solar eclipses occur approximately once every 18 months.
(that's roughly every year and a half)













This rare celestial event captivates people around the world, offering a unique opportunity to witness the beauty and wonder of our universe.

Multiple Choice

How often do solar eclipses occur?

• Once every 6 months

• Once every 12 months

• Once every 18 months

• Once every 24 months

Solar vs. Lunar

• Solar Eclipses: the moon's shadow falls on a small portion of Earth's sunny side. Occurs when the moon, sun, and Earth align - only during a New Moon)

  
  
  

• Lunar Eclipses: Earth blocks the sun's light from reaching the moon, causing it to appear reddish
  (only occurs during a Full Moon)

Multiple Choice

What occurs when the moon blocks the light from the sun, casting a shadow onto the Earth?

• solar eclipse

• lunar eclipse

​Lunar Eclipse

​The Earth blocks the sunlight from hitting the moon,
casting the moon into shadow (and turning it red)

Draw

Draw the order of the Earth, Sun, and Moon during a lunar eclipse!

Reorder

What order must these be in for a lunar eclipse to occur? (start with the Sun)

• Sun

• Earth

• Moon

1

2

3

• 1
• 2
• 3

Why does the moon turn red?

Trivia: During a lunar eclipse, the moon appears to fade away because Earth blocks the sun's light from reaching the moon. The bending of the remaining sunlight through Earth's atmosphere also contributes to the moon's reddish hue during a lunar eclipse. This is similar to a sunset.

Multiple Choice

What causes the moon to turn red during a lunar eclipse?

• The moon's shadow falling on Earth's sunny side

• The bending of sunlight through Earth's atmosphere

• The moon blocking the sun's light from reaching the Earth

Lunar Eclipse Trivia

Did you know:

Lunar eclipses do not
occur every month
because the moon's
orbit around Earth is tilted.


This means that most of the time, the moon is either above or below Earth's shadow. Only when the moon aligns perfectly with Earth and the sun do we get an eclipse!

Multiple Choice

Why don't we have a lunar eclipse every month?

• Because the moon's orbit around Earth is tilted

• Because the Earth is not always between the sun and moon

• Because the moon's orbit around Earth is circular

• Because the moon is not always in the Earth's shadow

Eclipses: Review

• Umbra vs Penumbra: The umbra is the darker part of the shadow during an eclipse, the penumbra is lighter.

  Eclipse Frequency:

  • Solar eclipses occur roughly every 18 months.

  • Lunar eclipses occur about 3 times a year.
    
    

  Total Solar Eclipse: To experience a total solar eclipse, you must be under the darkest part of the shadow - the umbra.

Multiple Choice

Which part of the shadow is the darkest during an eclipse?

• Umbra

• Penumbra

Multiple Choice

Which part of the shadow must you be under to experience a total solar eclipse?

• Umbra

• Penumbra

Poll

Do you feel like you understand eclipses?

• Yes

• No

• Mostly

• A little bit

Lesson 8.9.3-Eclipses & Tides

Essential Questions

2. How does the moon and the sun affect Earth's oceans?
   

What Are Tides?

• The force of gravity pulls the moon and the Earth (including the water on Earth's surface) toward each other.

• Tides are caused mainly by differences in how much gravity from the moon and the sun pulls on different part of Earth.

Multiple Choice

_________ are caused mainly by differences in how much _________ from the moon and the sun pulls on different part of Earth.

• Tides; gravity

• Gravity; tides

• New moon; tides

• Gravity; new moon

Multiple Choice

How many high tides does a beach get in a day?

• Just one

• Two- 12 hours apart

• Four all day

Multiple Choice

How often do low tides occur?

• Just one

• Two- 12 hours apart

• Once a month

What Are Tides?

• At any one time on Earth, there are two places with high tides and two places with low tides.

• As Earth rotates, one high tide occurs on the side of Earth that faces the moon.

• The second high tide occurs on the opposite side of Earth.

• Halfway between the high tides, water flows toward the high tides, causing low tides.

Multiple Choice

At any one time on Earth, there are ______ places with high tides and _____ places with low tides.

• two; two

• one; two

• two;one

• three;three

Multiple Choice

As Earth rotates, one high tide occurs on the side of Earth that faces the what?

• Moon

• Sun

• Star

What Are Tides?

• The moon's gravity pulls a little more strongly on the water on the side of Earth closest to the moon than on Earth as a whole.

• This difference causes a bulge of water on the side of Earth closest to the moon.

• The bulge causes high tide.

Multiple Select

During which moon phase(s) do Spring Tides occur

• Only in Spring

• New Moon

• First Quarter

• Full Moon

Multiple Select

During which moon phase(s) do Neap Tides occur?

• Only in Fall

• Crescent and Gibbous Moon

• First and Third Quarter

• Full and New Moon

Multiple Choice

Why does the moon's gravitational pull have more of effect on tides than the sun's gravitational pull?

• they are the same

• the moon is larger than the sun

• tides are not caused by the moon

• the moon is closer to the Earth than the sun

Multiple Choice

What type of tide will occur at 9:30 a.m.?

• low 

• high 

• none

• high and low

Multiple Choice

Which body has the greater effect on Earth's tides?

• Sun

• Saturn

• Moon

• Venus

Multiple Choice

Which phase of the moon is represented in this diagram?

• new moon

• first quarter

• full moon

• last quarter/third quarter

Multiple Choice

Wha type of tide would this arrangement of earth-moon-sun create?

• full moon tide

• new moon tide

• neap tide

• spring tide

Multiple Choice

What type of tides would this arrangement of earth-moon-sun create?

• neap tide

• spring tide

• new moon tide

• full moon tide

Multiple Choice

Neap tides happen at _________ and _________ phases of the moon.

• first quarter and new moon

• last quarter and full moon

• waxing and waning

• 1st quarter and 3rd quarter

Multiple Choice

High tides and low tides each happen _____ times per day.

• 4

• 2

• 1

• 24

Multiple Choice

Spring tides have the largest tidal ranges because...

• the earth, moon, and sun are aligned for greater gravitational force.

• the moon has the strongest gravitational force.

• the sun has the most gravitational force.

• none of the above

Multiple Choice

What happens when there is a spring tide

• high tides 

• really high tides

• low tides

Multiple Choice

During a neap tide, the sun, moon, and earth are at a ___________ angle.

• 360 degree

• 23.5 degree

• 45 degree

• 90 degree

Multiple Choice

The moon's gravity pulls more strongly on side the closet to the what?

• The Moon

• The Sun

• The Stars

What Are Tides?

• The moon's gravity pulls more weakly on the water on the far side of Earth than on Earth as a whole.

• Since Earth is pulled more strongly, the water "left behind."

• Water flows toward the far side, causing high tide.

Multiple Choice

The moon's gravity pulls more weakly on the water on the what?

• Far side of Earth

• Closest side of Earth

Multiple Choice

Water flows toward the far side, causing what?

• High Tide

• Low Tide

What Are Tides?

• The sun is so massive that, even though it is about 150 million km from Earth, it's gravity also affects the tides.

• The sun pulls the water on Earth's surface toward it.

• Changes in the positions of Earth, the moon, and the sun affect the heights of the tides during a month.

Multiple Choice

The _______ pulls the water on Earth's surface toward it.

• Sun

• Moon

• Stars

Multiple Choice

Changes in the positions of Earth, the moon, and the sun affect the __________ of the tides during a month.

• Height

• Length

What Are Tides?

• The sun, the moon, and the Earth are nearly in a line during a new moon.

• The gravity of the sun and moon pull in the same direction.

• Their combined forces produce a tide with the greatest difference between consecutive low and high tides, called a spring tide.

Multiple Choice

Their combined forces of the sun, Earth, and moon, produce a tide with the greatest difference between consecutive low and high tides which is called what?

• Spring Tides

• Neap Tides

• High Tides

• Low Tides

What Are Tides?

• During the moon's first-quarter phase, the line between Earth and the sun is at right angles to the line between Earth and the moon.

• The sun's pull is at right angles to the moon's pull.

• This arrangement produces neap tide, a tide with the least difference between consecutive low and high tides.

• Neap tides occur twice a month.

Multiple Choice

What is a tide with the least difference between consecutive low and high tides?

• Neap Tide

• Spring Tide

• High Tide

• Low Tide

What Are Tides?

• At full moon, the moon and the sun are on opposite side of Earth.

• Since there are high tides on both sides of Earth, a spring tide is also produced.

• It doesn't matter in which order the sun, Earth, and the moon line up.

Multiple Choice

At full moon, the moon and the sun are on opposite side of Earth, therefore, what is produced?

• Spring Tide

• Neap Tide

• High Tide

• Low Tide

Poll

You finished this lesson! Congrats!

How do you feel?