PHYSICAL SCIENCE

Question 1

Study of how the universe began, how it continues exist and how it will end

Answer 1

Cosmology

Question 2

Leading explanation about how the universe began

Answer 2

Big bang theory

Question 3

How old is the universe

Answer 3

13.8 billion

Question 4

Who proposed the theory of big bang theory

Answer 4

George Limaitre

Question 5

Process that creates a new atomic nucleus from pre-existing nucleons, primarily protons and neutrons

Answer 5

Nucleosynthesis

Question 6

Process of formation of light elements shortly after big bang

Answer 6

Bigbang nucleosynthesis

Question 7

Immense, luminous spurs of extremely hot gases

Answer 7

Stars

Question 8

Stars pass through various stages known as

Answer 8

Stellar life cycle

Question 9

Type of nuclear reaction in which the light nuclei fuse together to form a heavier nucleus

Answer 9

Nuclear fusion

Question 10

Giant cloud of gas and dust

Answer 10

Nebula

Question 11

Formed from nebula due to gravity that pull the hydrogen gas together until it spins a faster and faster and became ignited

Answer 11

Protostar

Question 12

Starts to form when nuclear fusion occurs at the core of the star begins to contract glow and become stable. Hydrogen is converted into helium

Answer 12

Main sequence

Question 13

Star is unable to generate heat when it runs out of hydrogen and its core leading to its construction and expansion. It cools down and glows red

Answer 13

Red giant

Question 14

When red giant star becomes exhausted of nuclear fuel, the outer material is blown off into space leaving the inert carbon

Answer 14

White dwarf

Question 15

No longer emits light and heat

Answer 15

Black dwarf

Question 16

More massive main sequence star evolves, cools and expands of faster than low must star.

Answer 16

Red supergiant

Question 17

Known as the largest star

Answer 17

Red supergiant

Question 18

Explosion of star or supernova releases large amount of energy

Answer 18

Supernova

Question 19

Collapse the core of a massive supergiant star

Answer 19

Neutron star

Question 20

Region in space where gravity is a two strong that no matter can escape from it

Answer 20

Black hole

Question 21

It is also known as the smallest star

Answer 21

Neutron star

Question 22

Formation of element and the center of the star

Answer 22

Stellar nucleosynthesis

Question 23

Unstable atom releases an alpha particle

Answer 23

Alpha decay

Question 24

Happens when a neutron turns into a proton

Answer 24

Beta minus decay

Question 25

Made of two protons and two neutrons

Answer 25

Alpha decay

Question 26

Mass stays the same but the atomic number increases by one

Answer 26

Beta minus decay

Question 27

An atom releases gamma rays

Answer 27

Gamma decay

Question 28

Mass stays the same but the atomic number decreases by one

Answer 28

Beta plus decay

Question 29

The atom does not change into a new element

Answer 29

Gamma decay

Question 30

Happens when a proton turns into a neutron

Answer 30

Beta plus decay

Question 31

Process by which average star gets their energy and convert hydrogen into helium

Answer 31

Proton proton chain reaction

Question 32

The stars and the main sequence fuse hydrogen into helium via 6 stages sequence of reaction

Answer 32

Carbon nitrogen oxygen cycle

Question 33

Involves the fusion of proton not to form helium

Answer 33

Proton proton chain reaction

Question 34

Happens when red giant star once they leave the stage of main sequence star

Answer 34

Tri-alpha process

Question 35

Star accumulates more mass and continues to grow and to red supergiant

Answer 35

Alpha ladder process

Question 36

Elements heavier than iron are only produced during supernova

Answer 36

Supernova nucleosynthesis

Question 37

Reaction in which an atomic nucleus collides with one or more neutrons to create heavier elements

Answer 37

Neutron capture

Question 38

Created a classification of elements based on their atomic weight

Answer 38

Dmitri Mendeleev

Question 39

Arrange the elements and the periodic table based on their increasing atomic number in 1913

Answer 39

Henry Gwen-Jeffrey Moseley

Question 40

In 1919 he successfully carried out a nuclear transmutation reaction a process that involves a change in the nucleus of an atom

Answer 40

Ernest rutherford

Question 41

Discover the neutron in 1932 as previously known neutral particle produce along with c12 by the nuclear reaction

Answer 41

James chadwick

Question 42

Devices used to speed up the protons to overcome the repulsion between the protons and the target atomic nucleus by using magnetic and electronical fields

Answer 42

Particle accelerator

Question 43

They bombarded molybinum by neutrons which synthesize the new element called technetium

Answer 43

Emilio segre and carlo perrier

Question 44

Four lights elements formed during big bang nucleosynthesis

Answer 44

Hydrogen, helium, lithium, beryllium

Question 45

Big bang nucleosynthesis started on how minutes after the big bang

Answer 45

3 minutes

Question 46

How many minutes did the four light elements formed

Answer 46

17 mins

Question 47

Isotope of hydrogen with one proton and one neutron

Answer 47

Deuteremium

Question 48

Isotope of hydrogen with one proton and two neutron

Answer 48

Tritium

Question 49

Isotope of hydrogen with two proton and two neutron

Answer 49

Helium

Question 50

Isotope of hydrogen with three protona and three neutron

Answer 50

Lithium

Question 51

Isotope of hydrogen with four proton and three neutron

Answer 51

Beryllium

Question 52

Most abundant element in the universe about 75%

Answer 52

Hydrogen

Question 53

The equal or unequal sharing of electrons among atoms of a molecule

Answer 53

Polarity

Question 54

The distribution of electrons is unequal

Answer 54

Polar bond

Question 55

Equal distribution of electrons among the atoms and molecule

Answer 55

Nonpolar bond

Question 56

Ability of each atom to attract electrons towards

Answer 56

Electronegativity

Question 57

Electronegativity is described by

Answer 57

Lenos pauling