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If the mass of a fixed volume of air increases it becomes less?
If the mass of a fixed volume of air increases, it becomes denser. This means that there are more air molecules present in that volume, making the air more compact and heavier.
If the mass of a fixed volume of air increases does the density become more or less dense?
If the mass of a fixed volume of air increases, the density of the air becomes more dense. Density is defined as mass divided by volume, so as the mass increases while the volume remains constant, the density increases.
What is a covection current caused by diffences in what?
Convection currents are caused by differences in density. Warmer fluid is less dense, so a fixed volume of the warmer fluid is lighter. Colder fluid is denser, and so heavier in a fixed volume. The colder, denser fluid presses down and falls below the less dense fluid, which floats up to the top of the fluid. Often, there is a heat source that the bottom of the container, so the fluid at the bottom, which was more dense, warms up and becomes less dense. At the same time, the fluid at the top cools down and becomes more dense, and so the cycle repeats, forming a convection current.
Sophie was asked to distinguish gases from solids and liquids. Which of the following answers would be most correct?
Gases adopt the form of the container it contains an hasn't a constant volume.. A liquid adopt the form of the container it contains but has a constant volume. A solid has form and constant volume.
Do Liquids have a fixed but do not have a fixed?
No, liquids do not have a fixed volume - their volume is that of the container
Has no fixed volume or shape?
A gas has no fixed volume or shape.
What has a volume but not a fixed shape?
A solid has a fixed volume and does not change shape.
How a liquid and a solid different?
A solid has a fixed volume and form. A liquid has a fixed volume but has the form of a container. A gas has not a fixed volume or form.
Are liquids quite dense and do they have a lot of particles in a small volume?
Yes, liquids are relatively dense compared to gases and have a high number of particles in a given volume. The particles in liquids are closer together and have more kinetic energy than in gases, allowing liquids to take the shape of their container while maintaining a fixed volume.
Which state would the substance be if it had no fixed volume?
The substance would be in a gaseous state if it had no fixed volume. Gases have no fixed shape or volume and can expand to fill the container they are in.
What is the phase of matter with no fixed shape but fixed volume?
The phase of matter with no fixed shape but fixed volume is a liquid. Liquids take the shape of their container but maintain a constant volume because the particles are close together but can move past each other.
Do solids have a fixed shape and volume?
Yes, solids have a fixed shape and volume. The particles in a solid are closely packed and have strong intermolecular forces that prevent them from moving freely, thus maintaining a fixed shape and volume.
