Name: Date:
Chemistry B Unit 1 Portfolio
Student Exploration: Boyle’s Law and Charles’ Law
Vocabulary: absolute zero, Boyle’s law, Charles’ law, Gay-Lussac’s law, Kelvin scale, pressure
Gizmo Warm-up
The Boyle’s Law and Charles’ Law Gizmo shows a
container of gas. In the container, the small purple
spheres represent molecules.
1. Observe the particles. Are they all moving at the same
speed? yes
2. How do the particles interact with the walls and lid of the container? They bounce off the
surface of the lid and walls.
These interactions contribute to the pressure on the walls of the container. Pressure is
defined as force per unit area. The SI units of pressure are newtons per square meter
(N/m2), or pascals (Pa).
3. Slowly drag the temperature (T) slider back and forth. (Note: In this Gizmo, the Kelvin
scale is used to measure temperature. On the Kelvin scale, 0 degrees is absolute zero, the
coldest possible temperature. Absolute zero is equal to -273.15 °C or -459.67 °F)
A. How does the change in temperature affect the speed of the molecules? When
warm the molecules move really fast, but when cold the molecules slow down, barely
moving at all.
, B. How does the change in temperature affect the volume of the container? The
colder it is, the less volume there is, the warmer it is though, there’s more volume.
Chemistry B Unit 1 Portfolio
Student Exploration: Boyle’s Law and Charles’ Law
Vocabulary: absolute zero, Boyle’s law, Charles’ law, Gay-Lussac’s law, Kelvin scale, pressure
Gizmo Warm-up
The Boyle’s Law and Charles’ Law Gizmo shows a
container of gas. In the container, the small purple
spheres represent molecules.
1. Observe the particles. Are they all moving at the same
speed? yes
2. How do the particles interact with the walls and lid of the container? They bounce off the
surface of the lid and walls.
These interactions contribute to the pressure on the walls of the container. Pressure is
defined as force per unit area. The SI units of pressure are newtons per square meter
(N/m2), or pascals (Pa).
3. Slowly drag the temperature (T) slider back and forth. (Note: In this Gizmo, the Kelvin
scale is used to measure temperature. On the Kelvin scale, 0 degrees is absolute zero, the
coldest possible temperature. Absolute zero is equal to -273.15 °C or -459.67 °F)
A. How does the change in temperature affect the speed of the molecules? When
warm the molecules move really fast, but when cold the molecules slow down, barely
moving at all.
, B. How does the change in temperature affect the volume of the container? The
colder it is, the less volume there is, the warmer it is though, there’s more volume.
