States of Matter
This state of matter has a definite shape and volume.
What is a solid?
A salad is an example of this.
What is a mixture?
Mass is measured in these units.
What are grams or kilograms?
A characteristic that describes a material.
What is a property?
Metals are good conductors of ______ and ______.
What are heat and electricity?
The particles in this state are far apart and move freely.
What is a gas?
In a solution, the substance that dissolves is called the ______.
What is the solute?
The mass of 200 g of water + 10 g of salt = ______.
What is 210g?
Shiny, flexible, and strong are examples of ______ properties.
What are physical properties?
Name one example of a metal.
What is iron, copper, aluminum, etc.?
A liquid has a definite ______ but takes the shape of its ______.
What is volume, container?
Saltwater is this type of mixture.
What is a solution?
Mass is the amount of ______ in an object.
What is matter?
A chemical property describes how a substance can ______.
What is react?
Engineers use mechanical tests to make sure materials are ______ and ______.
What is safe and strong?
Which state of matter can change both shape and volume?
What is a gas?
A mixture keeps the ______ of its substances.
What are the properties?
True/False: Mass changes when the shape of an object changes.
False
Name two important properties engineers test when building a playground surface.
What are strength and flexibility?
This test drops an object onto a surface to test impact safety.
What is a drop test?
Explain how the particles in solids, liquids, and gases are arranged.
Solids = tightly packed, Liquids = close but slide past each other, Gases = spread out and move freely.
Explain the difference between a mixture and a solution.
Mixture = substances combined but not dissolved; Solution = one substance dissolves in another.
Why does the mass of a mixture equal the sum of its parts?
Because matter is conserved and does not disappear when combined.
Give an example of a physical property and a chemical property.
Physical = color, hardness, density. Chemical = flammability, reactivity.
Name and explain one type of mechanical test.
Drop test (impact), Stress test (strength), Load test (weight capacity).