Supportive Education Service – Physical Science (AY 25-26)

Which theory explains that the universe and all matter originated from a single, tiny, dense, and hot point that rapidly expanded?

• Expansion Theory

• Dark Matter Theory

• Big Bang Theory

• Theory of Relativity

After the Big Bang, which light elements became most abundant in the universe?

• Hydrogen, helium, lithium

• Carbon dioxide, helium, hydrogen

• Nitrogen, hydrogen, helium

• Methane, hydrogen, lithium

What term describes the process involving the expansion of space that is filled with energy?

• Expansion

• Explosion

• Implosion

• Inflation

When a star depletes its hydrogen and converts it into helium in its core, into which heavier elements does helium transform?

• Hydrogen, helium, lithium

• Carbon, nitrogen, and oxygen

• Nitrogen, hydrogen, and oxygen

• Lithium, hydrogen, helium

What is the primary function of the CNO process in stars?

• It describes how massive stars fuse hydrogen into helium using carbon, nitrogen, and oxygen as catalysts.

• It explains the formation of black holes.

• It accounts for the creation of all elements heavier than helium.

• It refers to the cooling process of white dwarfs.

How is the Triple Alpha Process best described?

• It is the fusion of three alpha particles to form carbon atom.

• It is the process of hydrogen atoms combining to form helium.

• It is the splitting of a carbon atom into three helium nuclei.

• It is the transformation of oxygen into neon through fusion.

Which nuclear reaction involves an atomic nucleus colliding with neutrons to produce heavier elements?

• Fission

• Fusion

• Neutron capture

• Atom capture

Which element is currently the most abundant in the universe?

• Hydrogen

• Carbon

• Helium

• Nitrogen

Who first suggested that all matter consists of tiny, indivisible particles called “atomos”?

• Thales

• Mendeleyev

• Bohr

• Democritus

What is the term for the stellar core that forms when fragments of a collapsed molecular cloud contract?

• Supernova

• Red giant

• Protostar

• White dwarf