1. Alignment - Arrangement in a Straight Line

Vocabulary Unit 3

1. alignment - arrangement in a straight line

2. luminous - radiatingorreflectinglight

3. nuclear fusion - the source of all the energy radiated by the Sun; it converts hydrogen into helium

4. solar flares - a sudden temporary outburst of energy from a small area of the sun's surfacethat can affect the earth

5. sunspots - the dark spots that appear the sun's surface

6. Equinox - occurs twice a year (about March 21 and September 23) when the amount of sunlight is equal to the amount of darkness

7. Solstice - one of the two times during the year when the sun is farthest north or south of the equator

8. waxing - to increase in size or grow larger

9. waning - to decrease in size or grow smaller

10. gibbous - more than 50% of the side of the moon we see is lit by the sun

11. crescent - less than 50% of the side of the moon we see is lit by the sun

12. lunar eclipse - when the Earth blocks the Sun’s light from hitting the moons

13. solar eclipse - when the moon blocks the Sun’s light from hitting the Earth

Vocabulary Unit 3

1. alignment - arrangement in a straight line

2. luminous - radiatingorreflectinglight

3. nuclear fusion - the source of all the energy radiated by the Sun; it converts hydrogen into helium

4. solar flares - a sudden temporary outburst of energy from a small area of the sun's surfacethat can affect the earth

5. sunspots - the dark spots that appear the sun's surface

6. Equinox - occurs twice a year (about March 21 and September 23) when the amount of sunlight is equal to the amount of darkness

7. Solstice - one of the two times during the year when the sun is farthest north or south of the equator

8. waxing - to increase in size or grow larger

9. waning - to decrease in size or grow smaller

10. gibbous - more than 50% of the side of the moon we see is lit by the sun

11. crescent - less than 50% of the side of the moon we see is lit by the sun

12. lunar eclipse - when the Earth blocks the Sun’s light from hitting the moons

13. solar eclipse - when the moon blocks the Sun’s light from hitting the Earth