What are: sunlight, light, energy, sound, thoughts
100
A paper is crumbled up and thrown on the ground.
What is a physical change.
100
List a chemical property of a substance.
What are: reacts with oxygen, many substances dissolve easily in it, and reacts with any liquid element
*this is from the chart on pg. 159
100
a property that involves the ability of a new substance to react with other materials to form new substances
What is a chemical property
200
the smallest unit of an element that has the properties of that element
What is an atom
200
Who was the scientist who said that all matter is made up of different kinds of particles?
What is Democritus.
200
A marshmallow is roasted on the fire for a smore.
What is a chemical change.
200
Which of the following is not a compound: water, sulfur dioxide, salt, oxygen
What is oxygen.
200
a trait-such as color, shape, or hardness-that describes a substance by itself
What is physical property
300
a substance made of two or more different elements
What is a compound
300
Which of the following isn't considered an element: steel, silver, gold, or iron?
What is steel because it is made up of more than one atom.
300
A cheeseburger is eaten and digested in your stomach.
What is a chemical change.
300
List the properties of a metal.
What are shiny, malleable (easy to shape and form), ductile (can be pulled into thin strands), and conducts electricity.
300
a change in which a substance remains the same substance
What is a physical change
400
a substance made of only one kind of atom
What is an element
400
How many elelments have scientists identified on the periodic table of elements?
What is 116.
400
A piece of wood is carved into a beautiful sculpture.
What is a physical change.
400
Which of the following examples is a chemical reaction: sugar dissolves in hot tea, a rock is crushed into small pieces, liquid water freezes, hyrdogen and oxygen combine to form water.
What is hydrogen and oxygen combine to form water.
400
How can you seperate salt water?
I can seperate the two by boiling the water and then I would see that the salt is left over and I know this is a physical change because it is still salt.
500
a change in which a substance of two becomes a new substance or two
What is chemical change
500
How are the elements classified (hint: there are three major groups)?
What are nonmetals, metals, and noble gases.
500
Fireworks are released on the 4th of July.
What is a chemical change.
500
What will happen to a nail when it is exposed to both water and air?
What is a chemical change will take place and rust will begin to form on the nail.
500
How could I seperate metal shaving from a yellow powder?
I know that this is a mixture because I could use a magnet and seperate the powder from the shavings. There is no new product being made.