Science Test #7 Flashcards
7 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 7 Science Test #7 flashcards as text
What is the primary function of red blood cells in the human body?
Answer: Transporting oxygen throughout the body
Red blood cells contain hemoglobin, an iron-containing protein that binds to oxygen in the lungs and transports it to tissues throughout the body.
Which of the following correctly describes the relationship between wavelength and frequency of electromagnetic waves?
Answer: Shorter wavelength means higher frequency
Since all electromagnetic waves travel at the same speed (speed of light), shorter wavelengths must complete more cycles per second, meaning higher frequency.
A scientist wants to test whether a new fertilizer increases plant growth. Which variable should be kept the same in all test groups?
Answer: The type of plant used and amount of sunlight received
In a controlled experiment, all variables except the independent variable (fertilizer) must be kept constant so results can be attributed to the fertilizer alone.
The theory of plate tectonics explains which of the following phenomena?
Answer: The formation of mountains, earthquakes, and volcanoes
Plate tectonics describes how Earth's lithospheric plates move and interact, explaining the formation of mountains at collision zones, earthquakes at fault lines, and volcanic activity.
Which term describes the energy stored in chemical bonds of molecules like glucose?
Answer: Potential chemical energy
Chemical potential energy is stored in the bonds between atoms in molecules and is released when those bonds are broken during reactions like cellular respiration.
During mitosis, a parent cell with 46 chromosomes divides. How many chromosomes will each daughter cell have?
Answer: 46 chromosomes
Mitosis is cell division for growth and repair that produces two genetically identical daughter cells, each with the same number of chromosomes as the parent cell.
Which of the following best describes how vaccines protect against infectious diseases?
Answer: They stimulate the immune system to produce antibodies without causing disease
Vaccines introduce a harmless form of a pathogen (weakened, killed, or partial) that triggers the immune system to create antibodies and memory cells without causing the actual disease.