Physical Science Grade 11 Exam

Which refers to the most widely explanation to the origin of the universe?

• Stellar formation

• Evolution

• Big bang theory

• Natural selection

Who arranged the known elements in periodic table based on their atomic mass?

• Democritus

• Joseph Proust

• Empedocles

• Dmitri Mendeleev

When a low-mass star dies, it will become:

• A white dwarf

• A neutron star

• A black hole

• A red giant

When a high-mass star dies, it can become:

• White dwarf star / Black dwarf star

• Black hole/neutron star

• Red supergiant star

• All of the above

If the element Beryllium has an atomic number of 4, how many protons does it have?

• 2 protons

• 4 protons

• 6 protons

• 8 protons

The element Lithium (Li) has 3 protons and 4 neutrons. Given the number of protons and neutrons, what is the mass number of Lithium (Li)?

• 3

• 4

• 6

• 7

The element that comprises approximately 75% in the universe is:

• Helium

• Oxygen

• Hydrogen

• Carbon

Elements with an atomic number greater than (Iron) 26 are fused only during:

• Big bang Nucleosynthesis

• Stellar Nucleosynthesis

• Supernova

• Big bang Theory

____________ states that stars are formed when a dense region of molecular cloud collapse.

• Big Bang Theory

• Evolution Theory

• Creation Theory

• Star formation Theory

Two protons and two neutrons will be emitted during decay.

• Alpha

• Beta

• Gamma

• Fusion