What is a cloud?
A cloud is a collection of water droplets and/or ice crystals that float in the air above the surface of Earth.
What is pressure?
Pressure is defined as the force applied divided by the area over which the force is applied.
What is air pressure?
Air pressure is due to the weight of a column of air being pulled down towards Earth by gravity.
What is temperature?
Temperature is defined as the average kinetic energy of the particles of a substance. Temperature is also defined as the hotness or coldness of an object.
What is evaporation?
Evaporation is the process in which liquid particles move to the gas or vapor phase. This can occur at temperatures below the normal boiling point of the liquid.
What is condensation?
Condensation is the process in which a gas or vapor moves to the liquid phase.
What is an adiabatic process?
An adiabatic process involves the transfer of energy into or out of a system without the addition or removal of heat. When a gas expands rapidly, this change can result in a decrease in temperature even though no heat was removed from the system.
Here are some definitions to help you in your Grade 3-5 Lesson 1 investigation.
Temperature – how hot or cold something is
Pressure – the force per unit area
Atmospheres – a unit of measure of pressure
Evaporation – moving from the liquid to the gas phase
Condensation – moving from the gas to the liquid phase
Vapor – a substance that is normally in the liquid phase at room temperature but is currently in the gas phase
Observations – using senses to notice what is happening
Clouds appear in the sky almost every day. They seem to form out of nowhere and from nothing. In this investigation, you’ll try to make a cloud appear inside a container. Get ready to study the factors that cause clouds to form.
