Science Physical Science Flashcards
6 cards from real GED practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Science Physical Science flashcards as text
During which type of nuclear reaction is energy released by combining light atomic nuclei?
Answer: Nuclear fusion
Nuclear fusion releases energy by combining (fusing) light nuclei like hydrogen into heavier nuclei like helium. This is the process that powers stars including our Sun.
What is the relationship between wavelength and frequency of an electromagnetic wave?
Answer: They are inversely proportional — as wavelength increases, frequency decreases
All electromagnetic waves travel at the speed of light (c). Since c = λf, wavelength (λ) and frequency (f) are inversely proportional — longer wavelength means lower frequency.
Which describes what happens when a substance changes from liquid to gas without going through the boiling point?
Answer: Evaporation
Evaporation is the process by which molecules at the surface of a liquid escape into the gas phase below the boiling point. This occurs because some surface molecules have enough energy to overcome intermolecular forces.
In an electric circuit, what is the relationship between voltage (V), current (I), and resistance (R) according to Ohm's Law?
Answer: V = IR
Ohm's Law states V = IR: Voltage equals Current times Resistance. This means higher resistance reduces current for a given voltage.
Which of the following correctly identifies a balanced chemical equation?
Answer: 2H₂ + O₂ → 2H₂O
In 2H₂ + O₂ → 2H₂O: Left side has 4H + 2O, right side has 4H + 2O. Atoms are balanced on both sides.
What is the difference between speed and velocity?
Answer: Velocity includes direction, while speed does not
Speed is a scalar quantity (magnitude only). Velocity is a vector quantity that includes both magnitude (speed) AND direction. For example, 60 mph is a speed; 60 mph north is a velocity.