What is the smallest possible particle of an element?
atom
100
Which is not an element: iron, silver, gold, water?
water
100
What is a change of state?
substances changing from one state to another: solid to liquid, liquid to gas, etc.
100
List four physical properties of water.
colorless, odorless, boils at 100 degrees C, melts at 0 degrees C
100
Which of these is matter: energy, light, paper, sound?
paper
200
What is a substance made of just one kind of atom?
element
200
What chart is used to determine differences between elements?
Periodic Table of Elements
200
Give two examples of physical change.
shredding paper and melting ice
200
Another term for a chemical change is...
chemical reaction
200
Which is not a compound: oxygen, salt, sulfur dioxide, water?
Oxygen.
300
What is a change that results in the formation of new substances?
Chemical Change
300
Two of the groups scientists have classified elements into are?
Metals and non-metals
300
Why is dissolving a physical change?
The two substances do not combine to form something new - when water evaporates it leaves sugar.
300
List three clues a chemical change has occurred.
Color change, smell, new physical property, substance given off, heat given off
300
Write a chemical property of iron.
Reacts with oxygen in presence of water to form rust.
400
What is a change that does not results in a new substance?
Physical change
400
Describe the metal elements.
Shiny, stretched out thin or draw into wires, good conductors of electricity
400
If water is heated until it becomes a gas, which term identifies this change?
Boiling
400
Is whether a substance burns when oxygen is present a chemical or physical property?
Chemical property
400
What always happens when a chemical change occurs?
A new substance is produced.
500
What is a property that involves how substance interacts with other substances?
Chemical property
500
Describe similar properties of nonmetals.
Dull, brittle, break instead of stretching, some aren't solids
500
If a spoonful of salt dissolves in water, how can you prove it has gone through a physical change and not a chemical change?
Allow water to evaporate
500
Which of the following is a chemical reaction:
Hydrogen and oxygen combine to form water
Liquid water freezes and becomes ice
A rock is crushed into small pieces
Sugar dissolves in ice
Hydrogen and oxygen combine to form water
500
Water is made up of what two elements and how many atoms of each element?