Science Content Knowledge Flashcards
7 cards from real STEM 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 Content Knowledge flashcards as text
Which type of chemical bond involves the sharing of electron pairs between atoms?
Answer: Covalent bond
Covalent bonds form when two atoms share electron pairs, unlike ionic bonds where electrons are fully transferred.
What is the primary function of mitochondria in eukaryotic cells?
Answer: ATP production via cellular respiration
Mitochondria are the powerhouses of the cell, generating ATP through oxidative phosphorylation during cellular respiration.
According to Newton's Second Law of Motion, if the net force on an object doubles while mass remains constant, what happens to acceleration?
Answer: It doubles
Newton's Second Law states F = ma, so if F doubles and m is constant, acceleration a must also double.
Which layer of Earth's atmosphere contains the ozone layer?
Answer: Stratosphere
The ozone layer is located within the stratosphere, approximately 15–35 km above Earth's surface.
What is the name of the process by which plants convert light energy into chemical energy?
Answer: Photosynthesis
Photosynthesis is the process by which plants use sunlight, water, and CO₂ to produce glucose and oxygen.
Which subatomic particle determines the atomic number of an element?
Answer: Protons
The atomic number equals the number of protons in an atom's nucleus, uniquely identifying each element.
When a wave moves from air into water, which property remains constant?
Answer: Frequency
Frequency remains constant when a wave changes medium; speed and wavelength change while frequency does not.