PHYSICAL SCIENCE SUMMATIVE TEST

What primarily determines the path a star will follow in its lifetime?

• Color

• Size

• Mass

• Luminosity

How do stars release enough outward energy to counteract gravity and prevent collapse?

  

• Fusion of hydrogen and helium

• Nuclear fission

• Electromagnetic repulsion

• Triple alpha process

What is the final stage of a low-mass star, where it leaves behind a tiny hot core about the size of the Earth?

• Red Giant

• White Dwarf

• Supernova

• Asymptotic Giant Branch

Why do high-mass stars burn their fuel much faster than low-mass stars?

• Higher luminosity

• Stronger electromagnetic repulsion

• Greater outward pressure

• Larger core size

What event marks the explosive death of a high-mass star, ejecting heavy nuclei into space?

 

• Red Giant Phase

• Helium Flash

• Supernova

• Horizontal Branch

How did Dmitri Mendeleev initially classify elements in the periodic table?

• Alphabetical order

• Atomic number

• Physical weight

• Electronegativity

Who advanced the understanding of the periodic table by introducing the concept of atomic number?

• Dmitri Mendeleev

• Marie Curie

• Henry Moseley

• Niels Bohr

How did Moseley arrange elements in the periodic table more accurately than Mendeleev?

• By physical weight

• By atomic mass

• By square root of emitted frequency

• Alphabetical order

What experimental evidence did Moseley use to support the atomic number concept?

• X-ray spectroscopy

• Electron microscopy

• Infrared spectroscopy

• Mass spectrometry

What device paved the way for artificially transmuting elements by bombarding nuclei with high-energy particles?

• Spectrometer

• Cyclotron

• Particle accelerator

• Electromagnet