Formation of Heavy Elements

Question 1

The most accepted theory about the formation of the universe which explains that it continues to expand

Answer 1

big bang theory

Question 2

The following are light elements except

a. helium c. lithium
b. hyd d. iron

Answer 2

d. iron

Question 3

The process of forming elements is known as;

Answer 3

nucleosynthesis

Question 4

Light elements such as hydrogen and helium are formed through the process
of __________ nucleosynthesis.

Answer 4

big bang

Question 5

Which element is the lightest and at the same time the most abundant in outer
space?

Answer 5

a. hydrogen

Question 6

A reaction in which two or more nuclei combine to form heavier nuclei

Answer 6

nuclear fusion

Question 7

What element can be formed when three atoms of helium are fused?

Answer 7

carbon

Question 8

Which of the following elements DOES NOT belong to the group?
a. beryllium c. iron
b. silicon d. oxygen

Answer 8

a. beryllium

Question 9

The process in which elements are formed at the center of a star.

Answer 9

stellar nucleosynthesis

Question 10

Elements bigger than Iron are formed through_______.

Answer 10

Supernova nucleosynthesis

Question 11

When Carbon atom is combined with Helium atom, the element _______ will
be formed.

Answer 11

oxygen

Question 12

Average stars have longer life span than massive stars. This is
because

Answer 12

b. they have more fuel to burn

Question 13

Our sun is in what phase of its life cycle?

Answer 13

main sequence star

Question 14

contains only heavy elements?

Answer 14

carbon, silicon, magnesium

Question 15

In which stage do massive stars explode and release large amount of energy?

Answer 15

super nova

Question 16

The star is unable to generate heat when it runs out of hydrogen in its core leading to its contraction and expansion. It cools down and glows red. The Helium fused into Carbon.

Answer 16

RED GIANT

Question 17

Red giant star becomes exhausted of nuclear fuel, the outer material is blown off into space leaving the inert Carbon.

Answer 17

WHITE DWARF.

Question 18

Giant cloud of gas and dust

Answer 18

NEBULA

Question 19

It is formed from nebula due to the gravity that pulled Hydrogen gas together until it spins faster and faster and becomes ignited.

Answer 19

A PROTOSTAR rises

Question 20

starts to form when nuclear fusion
occurs at the core of the star, it begins to contract, glow and become stable. Hydrogen is converted into Helium.

Answer 20

MAIN SEQUENCE STAR

Question 21

This is said to be the remain of the white dwarf that cooled down and no longer emits light and heat.

Answer 21

The hypothetical BLACK
DWARF.

Question 22

is formed from supernova explosion. This is also the smallest star

Answer 22

NEUTRON STAR

Question 23

Explosion of star releases large amount of
energy. Because of that, elements are dispersed into the space.

Answer 23

r SUPERNOVA

Question 24

s a region in space where gravity is too strong that
no matter can escape from it

Answer 24

BLACK HOLE

Question 25

A more massive main sequence star evolves, cools, and expands faster than a low-mass star and will turn into the largest known star. Carbon fusion still occurs and Oxygen
formed.

Answer 25

RED SUPER GIANT

Question 25

A more massive main sequence star evolves, cools, and expands faster than a low-mass star and will turn into the largest known star. Carbon fusion still occurs and Oxygen
formed.

Answer 25

RED SUPER GIANT

Question 26

happens when there is a slow
rate of capturing neutron while there is a faster rate of radioactive decay hence increasing the proton by 1.

Answer 26

S-process or slow process

Question 27

means that there is a faster rate of
capturing neutron before it undergoes radioactive decay thus, more neutrons can be combined in the nucleus. This is what happens in a supernova forming heavier elements than Iron with the process known as supernova nucleosynthesis.

Answer 27

R-process or rapid process

Question 28

Which process produced Star’s energy?

Answer 28

nuclear fusion

Question 29

Which of the following will sun’s evolve when reaches the end of red giant
phase?

Answer 29

white dwarf

Question 30

These are the biggest stars in the universe.

Answer 30

red super giant

Question 31

Which of the following gases are major components of star?

Answer 31

hydrogen and helium

Question 32

Which is the first stage of a star’s life cycle?

Answer 32

nebula

Question 33

In main sequence star, Hydrogen fuses and converted to Helium and Helium
is converted into ________ at its core.

Answer 33

carbon

Question 34

What object is formed from gas and dust particles which are pulled together by gravity and no nuclear fusion has happened yet?

Answer 34

c. protostar

Question 35

Who stated that we are made of star stuff?

Answer 35

Carl Sagan

Question 36

What is the sign that a protostar will transform into the next stage?

Answer 36

Protostar will transform when Hydrogen nuclear fusion begins.

Question 37

.When does a star become unstable?

Answer 37

Star become unstable when it runs out of fuel

Question 38

Which fusion of elements does Iron come from?

Answer 38

silicon fusion