Solar and Lunar Eclipse Terms• Lunar eclipse solar eclipse

• Total eclipse partial eclipse

How does Earth, the moon, and the sun align during a solar eclipse and lunar

eclipse?• What causes solar and

lunar eclipses?

• Why do lunar eclipses occur only at a full moon?

• Why do solar eclipses occur only at a new moon?

• Why is there not a solar or lunar eclipse every month?

Solar and Lunar Eclipses

• A solar and lunar eclipse occurs only when the earth, moon, and sun are directly lined up.

• There are two types of eclipses.• The moon goes dark during a lunar eclipse.• The sun goes dark during a solar eclipse.

Lunar Eclipse

• A lunar eclipse occurs when Earth passes directly between the sun and the moon. The Earth casts a shadow on the moon.

• A lunar eclipse can happen only during full moon. This is because it is the only time when Earth, the sun, and the moon are directly lined up with the Earth between the moon and the sun.

Lunar Eclipse

Solar Eclipse• A solar eclipse occurs when

the moon passes directly between the sun and Earth. The moon casts a shadow on a part of Earth’s surface.

• A solar eclipse can happen only during a new moon. This is because it is the only time when Earth, the sun, and the moon are directly lined up with the moon between Earth and the sun.

Solar Eclipse

Solar and Lunar Eclipses

• There is not a lunar or solar eclipse every month because the moon is not always on the same plane as Earth and the sun.

• The moon orbits Earth at an angle.

• An eclipse can be total or partial.

• A total eclipse occurs when the moon or sun becomes completely covered.

• A partial eclipse occurs when the moon or sun becomes only partly covered.

Quick Check

Under what conditions will an eclipse take place?

a. only when the sun and Earth are directly lined up

b. only when the moon and Earth are directly lined upc. only when the moon, the sun, and

Earth are not exactly lined upd. only when the moon, the sun, and

Earth are directly lined up

Quick Check

What phase must the moon be in to allow for a lunar eclipse?

a. new

b. full

c. first quarter

d. waxing gibbous

Quick Check

Although the moon is much smaller than the sun, it looks about the same size when viewed from Earth. What fact might account for this observation?

a. The moon is farther from Earth than the sun.

b. Earth is closer to the sun than the moon

c. The moon is closer to Earth than the sun.

d. The moon shines brighter than the sun

Quick Check

What conditions would produce a partial eclipse of the moon?

a. the moon is on the same plane as the sun and Earthb. the moon is below the plane of the sun and Earthc. the moon is far above the plane of the sun and Earthd. none of the above

Quick Check

When Earth’s shadow falls on the moon, the shadow causes a

a. new moon.

b. solar eclipse.

c. full moon.

d. lunar eclipse.