This is anything that takes up space (and has mass).
What is matter?
In this state of matter, particles are packed very tightly together and can barely move.
What is a solid?
This is the process of a solid turning into a liquid.
What is melting?
This type of heat transfer happens when a hotter material moves towards a cooler area; NO direct contact.
What is convection?
When a thermometer is placed in a substance, it is measuring this.
What is temperature?
Everything in existence is made up of these.
What are atoms or particles?
Substances in this state of matter have NO definite volume and NO definite shape.
What is a gas?
This is the process of a liquid turning into a gas.
What is evaporation?
When these types of changes take place, the substance does NOT change into a new substance. These types of changes can usually be undone or reversed.
What are physical changes?
If molecules in a substance increase their speed, its temperature will do this.
What is the temperature will increase?
These are the three most common states of matter.
What are solids, liquids and gases?
Matter in this state has a definite volume, but NOT a definite shape.
What is a liquid?
This is the process of a gas turning into a liquid.
What is condensation?
During this type of change, a chemical reaction takes place, and a new substance is formed. These types of changes are impossible or difficult to reverse.
What are chemical changes?
When there are two substances/objects of different temperatures (one is warm, one is cool), thermal energy will always transfer this way.
What is from the warmer substance/object to the cooler substance/object?
The amount of matter something contains is this.
What is its mass?
In this state of matter, molecules are the furthest apart.
What is gas?
This is the process of a liquid turning into a solid.
What is freezing or solidification?
Changes in states of matter happen when this is added or removed.
What is when heat is added or removed?
This type of heat transfer occurs through open space, without movement from hotter to cooler areas or direct contact.
What is radiation?
This is the amount of space something takes up.
What is volume?
This state of matter has a definite volume but NO definite shape.
What is a liquid?
As water molecules freeze, this happens to their speed.
What is the water molecules slow down?
These TWO physical changes can be caused by ADDING heat.
What are evaporation and melting?
This type of heat transfer happens when heat moves through direct contact.
What is conduction?
These are observable events that occur in nature; these events make us wonder and inspire curiosity!
What are phenomena?
Matter in this state has the ability to glow.
What is plasma?
This is the freezing point of water on the Celsius scale.
What is 0o Celsius?
These TWO physical changes are caused by REMOVING heat.
What are condensation and freezing?
This is the average kinetic energy of the molecules in a substance.
What is temperature?