Matter
What is matter?
Matter is anything that takes up space and has mass.
What is a solid?
A solid is matter that has a definite volume and a definite shape.
What is a physical change?
A physical change is when there is no change in the matter itself.
Why does a substance expand?
Due to increased temperature
What is a conductor?
A conductor is a material that transmits heat easily.
What is mass?
Mass is the amount of matter in an object, measured in grams or kilograms.
What is a liquid?
A liquid has a definite volume but takes the shape of its container.
What is a chemical change?
A chemical change occurs when a new substance is formed.
What is contraction?
Contraction is when a substance shrinks in size due to decreased temperature.
What is an insulator?
An insulator is a material that is a poor conductor of heat.
What are properties?
Properties are characteristics and qualities that describe matter.
What is a gas?
A gas is a substance that has no definite volume or shape.
Give an example of a physical change.
Melting ice is a physical change.
Why do sidewalks crack in the summer?
Sidewalks crack in the summer because the concrete expands when it gets hot.
Name a good conductor of heat.
Examples include metals like copper or aluminum.
What is weight?
Weight is the result of the gravitational pull on an object.
Give an example of a solid.
Examples of solids include a pencil, a tree, or a rock.
What are signs of a chemical change?
Signs include color change, gas production, and the formation of a new substance
How does heating affect molecular movement?
Heating causes molecules to move faster and spread apart.
Why are insulators important?
Insulators are important because they help to reduce heat loss.
Explain the conservation of matter.
The conservation of matter states that the amount of matter stays the same, even when it changes form.
How does heat energy affect the state of matter?
Heat energy can change the state of matter by causing molecules to move differently, leading to changes like melting or boiling.
What does it mean when we say that matter cannot be created or destroyed?
It means that the mass of the material remains constant, even though it may change forms.
Give an example of thermal expansion.
A metal lid expanding when heated is an example of thermal expansion.
How do insulators and conductors differ?
Insulators do not allow heat to pass through easily, while conductors allow heat to flow freely.