is a very young star that is still gathering mass from its parent molecular cloud

Question 1

is a very young star that is still gathering mass from its
parent molecular cloud

Answer 1

Protostar

Question 2

is a star that has exhausted the supply of hydrogen in its
core and has begun thermonuclear fusion of hydrogen in a shell
surrounding the core. They have radii tens to hundreds of times larger
than that of the Sun. However, their outer envelope is lower in
temperature, giving them a yellowish-orange hue.

Answer 2

A red giant

Question 3

In astronomy, the ____ is a classification of stars
which appear on plots of stellar color versus brightness as a
continuous and distinctive band.

Answer 3

main sequence

Question 4

is a broad classification that includes stars in the later
stages of their evolution, characterized by larger sizes and higher
luminosities compared to main-sequence stars like the Sun

Answer 4

Giant Star

Question 5

on the other hand, specifically refers to a giant star in
a particular phase of its evolution. are stars that have
exhausted the hydrogen in their cores and have expanded as a result.
The outer layers of a become cooler, causing the star to
appear red. Therefore, all are giant stars, but not all giant
stars are necessarily

Answer 5

Red giant Star

Question 6

is a classification of stars based on their size and luminosity. There are two
main types of dwarf stars: main-sequence dwarfs and white dwarfs.

Answer 6

Dwarf Star

Question 7

Most stars, including our Sun, fall into this category during the majority of their active lives.
They are in a stable phase where nuclear fusion in their cores balances the gravitational
forces trying to collapse the star.
The term “dwarf” in this context does not imply small size; it refers to the star being in a
stable, long-lived phase of its life cycle.

Answer 7

Main Sequence Star

Question 8

are the remnants of stars that have exhausted their nuclear fuel and have
undergone certain stages of stellar evolution.
These stars are relatively small and extremely dense, with masses comparable to that of
the Sun but sizes similar to Earth.
are hot and luminous initially but gradually cool down over billions of years.
In summary, the term “” encompasses both main-sequence dwarfs (like our Sun)
and white dwarfs (the remnants of evolved stars). The classification is based on the stage
of the star’s life and its current state of nuclear activity

Answer 8

White Dwarf

Question 9

is a powerful and cataclysmic stellar explosion that occurs
when a star reaches the end of its life cycle. These explosions release
an immense amount of energy, making some of the most
energetic events in the universe

Answer 9

Supernova

Question 10

An electrical attraction between the nucleus and valence electrons of an atom and which binds atom together

Answer 10

Chemical Bond

Question 11

Types of Chemical Bond
This bond exists between metal that has a
tendency to lose electrons, and a non metal
that has the tendency to accept electrons

Answer 11

Ionic Bond

Question 12

Types of Chemical Bond
is sharing of an electron pair between atoms
exists, this type occurs between non metals.

Answer 12

Covalent Bond

Question 13

A covalent bond may be classified as:

Answer 13

a. POLAR COVALENT
b. NON POLAR COVALENT

Question 14

Types of Chemical Bond
The electrons are unequally shared
by the atoms and spend more time
close to one atom than the other.

Answer 14

Polar Covalent bond

Question 15

Types of Chemical Bond
A molecule which does not have the charges
present at the end due to the reason that
electrons are finely distributed and those which
symmetrically cancel out each other.

Answer 15

NON-POLAR COVALENT BOND

Question 16

are those electrons
found in the outermost shell of an
atom. In other words, these are the
electrons that can be gained or lost
during a chemical reaction

Answer 16

Valence electrons