Question

drill

1. what is one star hotter than the sun?
2. what is one star cooler than the sun?
3. what is one star brighter than the sun?
4. what is one star dimmer than the sun?

look up definitions for vocabulary:
life cycle
main sequence
red giant
super giant
white dwarf
fuse (fusion)
atoms
protons
neutrons

Explanation:

1. Hotter star: Rigel is a blue - supergiant and much hotter than the Sun.
2. Cooler star: Proxima Centauri is a red dwarf and cooler than the Sun.
3. Brighter star: Sirius is very bright and more luminous than the Sun.
4. Dimmer star: Barnard's Star is a red dwarf and dimmer than the Sun.

• Life cycle: The sequence of changes a star undergoes from its formation to its end, including phases like main - sequence, red - giant, etc.
• Main sequence: The longest - lived phase of a star's life where it fuses hydrogen into helium in its core.
• Red giant: A late - stage in a star's life where it expands, cools, and becomes red and very large.
• Super giant: An extremely large and luminous star, much bigger than a red giant.
• White dwarf: A small, dense star that is the remains of a low - to medium - mass star after it has exhausted its nuclear fuel.
• Fuse (Fusion): The process in which atomic nuclei combine to form a heavier nucleus, releasing energy in stars.
• Atoms: The basic building blocks of matter, consisting of a nucleus and electrons.
• Protons: Positively charged particles found in the nucleus of an atom.
• Neutrons: Neutral particles found in the nucleus of an atom.

Answer:

1. Rigel
2. Proxima Centauri
3. Sirius
4. Barnard's Star

Life cycle: The sequence of changes a star goes through from birth to death.
Main sequence: The stable phase of a star's life where hydrogen fusion occurs.
Red giant: A large, cool, red star in a late stage of evolution.
Super giant: An extremely large and bright star.
White dwarf: A small, dense remnant of a star.
Fuse (Fusion): The process of combining atomic nuclei in a star.
Atoms: The fundamental units of matter.
Protons: Positively - charged subatomic particles in an atom's nucleus.
Neutrons: Neutral subatomic particles in an atom's nucleus.