B.L.A.; occasionally A.L.B. Bachelor of Liberal Arts Natural Sciences 2 — Questions and Answers
Question 1: The theory of plate tectonics explains which geological phenomenon?
- The movement of large sections of Earth's crust that causes earthquakes, volcanoes, and mountain formation (Correct answer)
- The periodic changes in Earth's climate due to orbital variations
- The cycling of water between atmosphere, land, and oceans
- The formation of sedimentary rock layers over millions of years
Correct answer: The movement of large sections of Earth's crust that causes earthquakes, volcanoes, and mountain formation
Plate tectonics describes how Earth's lithosphere is divided into moving plates whose interactions at boundaries cause major geological features and events.
Question 2: Photosynthesis in plants converts which inputs into glucose and oxygen?
- Carbon dioxide and water, using sunlight energy (Correct answer)
- Oxygen and nitrogen, using soil minerals
- Carbon dioxide and nitrogen, using UV radiation
- Water and minerals, using chemical energy from soil
Correct answer: Carbon dioxide and water, using sunlight energy
Photosynthesis uses light energy to convert CO₂ and H₂O into glucose (for energy storage) and releases O₂ as a byproduct.
Question 3: In astronomy, a 'light-year' is a unit measuring which quantity?
- Distance — the distance light travels in one year (Correct answer)
- Time — one year as measured from a distant star
- Speed — the velocity of light relative to an observer
- Brightness — the luminosity of a star relative to the Sun
Correct answer: Distance — the distance light travels in one year
A light-year is a unit of distance equal to approximately 9.46 trillion kilometers, the distance light travels in one Earth year.
Question 4: The periodic table of elements organizes elements primarily according to which property?
- Atomic number (number of protons) with elements arranged by recurring chemical properties (Correct answer)
- Atomic mass from lightest to heaviest element
- State of matter at room temperature
- Abundance in Earth's crust from most to least common
Correct answer: Atomic number (number of protons) with elements arranged by recurring chemical properties
The periodic table arranges elements by increasing atomic number, with elements sharing chemical properties appearing in the same vertical groups.
Question 5: Which term describes the process by which radioactive atoms emit radiation and transform into different elements over time?
- Radioactive decay (Correct answer)
- Nuclear fission
- Nuclear fusion
- Atomic ionization
Correct answer: Radioactive decay
Radioactive decay is the spontaneous process by which unstable atomic nuclei lose energy by emitting radiation, transforming into more stable elements.
Question 6: In biology, the term 'homeostasis' refers to which physiological process?
- The tendency of living systems to maintain stable internal conditions despite external changes (Correct answer)
- The process of cell division and reproduction
- The absorption of nutrients through the digestive system
- The transmission of nerve impulses through the body
Correct answer: The tendency of living systems to maintain stable internal conditions despite external changes
Homeostasis is the ability of an organism to maintain a stable internal environment (temperature, pH, blood sugar) through regulatory mechanisms.
B.L.A.; occasionally A.L.B. Bachelor of Liberal Arts Natural Sciences 2
The theory of plate tectonics explains which geological phenomenon?