property of biological membranes that allows some substances to pass across, while others cannot

• selectively permeable
• vacuole
• trait
• stimulus

sequence of changes that occurs in a star as it age; this process is driven by gravity due to mass and pressure due to nuclear fusion

• theory
• stellar evolution
• transformation of energy
• v = d/t

any physical or chemical input that is sensed

• transformation of energy
• v = d/t
• stimulus
• wave (electromagnetic)

a well-substantiated explanation of some aspect of the natural world that can incorporate facts, laws, inferences, and tested hypotheses

• selectively permeable
• trait
• v = d/t
• theory

specific characteristic of an individual

• trait
• vacuole
• stimulus
• theory

energy can transfer from one form to another (e.g. nuclear to heat, chemical to mechanical, electrical to light )

• wave (electromagnetic)
• transformation of energy
• valence electrons
• v = d/t

velocity = displacement / time

• stimulus
• wave (electromagnetic)
• v = d/t
• transformation of energy

organelle that is used to store materials

• selectively permeable
• trait
• valence electrons
• vacuole

the electrons in the outer shell or energy level that are available for bonding

• valence electrons
• stellar evolution
• transformation of energy
• wave (electromagnetic)

a disturbance that travels through space as a result of changes in the motions of charges or changing magnetic field

• valence electrons
• wave (electromagnetic)
• transformation of energy
• selectively permeable