Diffusion Gizmo and Controlled Experiments,
Biology, 2026 – Practice Questions with Verified
Answers
Introduction:
This document covers diffusion, controlled experiments, and key
scientific method concepts, including independent and dependent
variables, constants, control groups, and experimental groups. It
also explains how temperature, particle mass, particle
concentration, and barrier size affect the rate of diffusion. The
material is ideal for reviewing core biology and laboratory
investigation concepts.
Exam Questions and Answers
Conditions that stay the same (identical) between the control and
experimental groups in an experiment --- correct precise answer --
-Constants
As particle mass decreases, the rate of diffusion increases.
Less massive particles move more quickly than more massive
particles. --- correct precise answer ---How does particle mass
affect the rate of diffusion?
The higher the temperature, the faster the rate of diffusion. This is
because the particles have more energy so they move faster. ---
, correct precise answer ---How does temperature affect the rate of
diffusion?
The smaller the wall, the greater the rate of diffusion.
As the size of the wall decreases, it becomes easier for particles to
move from one side of the chamber to the other. --- correct precise
answer ---How does the height of the wall affect the rate of
diffusion?
A temperature scale based on absolute zero --- correct precise
answer ---Kelvin
The coldest possible temperature, 0 Kelvin, that can be reached. It
is the hypothetical temperature at which all molecular motion
stops. --- correct precise answer ---Absolute zero
An experiment in which only one variable is changed while keeping
all other variables constant.
Ex: If you were investigating the effect of temperature on the rate
of diffusion, you would experiment with different temperatures,
but leave the particle mass, wall size and number of particles the
same in each trial. --- correct precise answer ---controlled
experiment
Biology, 2026 – Practice Questions with Verified
Answers
Introduction:
This document covers diffusion, controlled experiments, and key
scientific method concepts, including independent and dependent
variables, constants, control groups, and experimental groups. It
also explains how temperature, particle mass, particle
concentration, and barrier size affect the rate of diffusion. The
material is ideal for reviewing core biology and laboratory
investigation concepts.
Exam Questions and Answers
Conditions that stay the same (identical) between the control and
experimental groups in an experiment --- correct precise answer --
-Constants
As particle mass decreases, the rate of diffusion increases.
Less massive particles move more quickly than more massive
particles. --- correct precise answer ---How does particle mass
affect the rate of diffusion?
The higher the temperature, the faster the rate of diffusion. This is
because the particles have more energy so they move faster. ---
, correct precise answer ---How does temperature affect the rate of
diffusion?
The smaller the wall, the greater the rate of diffusion.
As the size of the wall decreases, it becomes easier for particles to
move from one side of the chamber to the other. --- correct precise
answer ---How does the height of the wall affect the rate of
diffusion?
A temperature scale based on absolute zero --- correct precise
answer ---Kelvin
The coldest possible temperature, 0 Kelvin, that can be reached. It
is the hypothetical temperature at which all molecular motion
stops. --- correct precise answer ---Absolute zero
An experiment in which only one variable is changed while keeping
all other variables constant.
Ex: If you were investigating the effect of temperature on the rate
of diffusion, you would experiment with different temperatures,
but leave the particle mass, wall size and number of particles the
same in each trial. --- correct precise answer ---controlled
experiment
