Show:
Elements
Compounds
Mixtures/
Solutions
Physical
Properties
Chemical
Properties
100
How many known elements are there?
The number of known elements are just over 100.
100
What is formed when two or more atoms join together?
When two or more atoms join together, they form a molecule.
100
What is a mixture?
A mixture is two or more substances that are mixed together but can be seperated out because their atoms are not combined.
100
What is described by using your senses to observe an object?
What is described by using your senses to observe an object is the object's physical property.
100
What substance is formed when wood is burned?
The substance that is formed when wood is burned is ash.
200
What is the part of an atom that is found outside the nucleus?
The part of an atom that is found outside the nucleus is the electron.
200
What do you call the new substance that is formed when you combine the atoms of different elements?
The new substance that is formed when you combine the atoms of different elements is called a compound.
200
What are at least three examples of mixtures?
At least three examples of mixtures are salads, sand and iron filings, and marbles and water.
200
What are at least three examples of general physical properties of an object that can be described by using your senses?
At least three examples of general physical properties of an object that can be described by using your senses are the object's color, shape, taste, texture, odor & size.
200
What is formed when iron atoms combine with oxygen atoms?
When iron atoms combine with oxygen atoms, rust is formed.
300
What is the name of the chart that classifies the elements?
The name of the chart that classifies the elements is the periodic table.
300
What are at least three examples of compounds?
At least three examples of compounds would include water, salt, and rust, etc.
300
What is a solution?
A solution is a mixture in which substances break up into their most basic particles and spread evenly through another substance.
300
What is the physical property used to describe how much a substance will stretch or bend?
The physical property used to describe how much a substance will stretch or bend is called elasticity.
300
What are at least three examples of a chemical change?
At least three examples of a chemical change would include baking a cake, cut fruit browning, and ripening fruit.
400
What are the parts of the atom found inside the nucleus?
The parts of the atom found inside the nucleus are the protons and neutrons.
400
What are the common names for iron oxide and sodium chloride?
The common names for iron oxide and sodium chloride are rust and salt.
400
What are at least three examples of a solution?
At least three examples of a solution would include lemonade, iced tea, soda, chocolate milk, etc.
400
What are at least three examples of physical properties that usually require some type of measuring tool to describe an object?
At least three examples of physical properties that usually require some type of measuring tool to describe an object would include mass, melting point, magnetism, hardness, and elasticity.
400
What substance is formed when baking soda combines with vinegar?
The substance that is formed when baking soda combines with vinegar is carbon dioxide.
500
Who created the chart of the elements?
Mendeleev created the chart of the elements.
500
What are two possible ways to seperate a compound into its elements?
Two possible ways to seperate a compound into its elements are by heat and light.
500
What is the main difference between mixtures and solutions?
The main difference between these two are that mixtures are easily seperated while solutions are very difficult to seperate.
500
Fully describe the three states of matter of H2O?
A full description of the three states of matter of H2O includes that as a solid it is ice, as a liquid it is water (e.g. a puddle), and as a gas it is water vapor.
500
Why is it important to know about chemical properties?
It is important to know about chemical properties because it can help in identifying elements and compounds.