Blue or blue-white White
Yellow
Red-orange
Red
Brightness
Supergiants
Rigel
Deneb
Betelgeuse
Zeta
North Star (Polaris)
Erldani
Antares
• Spica
Canopus
Main sequence
Algol
Regulus
Aldebaran
Capella
Mira
Vega
Mizar
Arcturus
Sirius
Giants
Procyon
Pollux
Altair
Alcor
Sun
Alpha Centauri A
Tau ceti
Alpha Centauri B
M
Sirius B
Epsilon Eridoni
Increasing
Barnard's star
White dwarts
• Procyon 8
• Van Maanen's star
10,000 6,000
5,000
Surface Temperature (°C)
50,000
20,000
3,000
1. Describe the characteristics of Zeta Eridani in terms of heat, brightness, and the group it
belongs to.
2. Which is hotter, Sirius B or the North Star (Polaris)?
3. Which is brighter White Dwarfs or Giants?

chemistry sucks a**

explanation:

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.