23 questions
A pure substance made of only one type of matter.
Element
Compound
Mixture
Molecule
Matter is neither created nor destroyed.
Conservation of Energy
Conservation of Mass
Conversation of Mass
Conversion of Energy
The smallest particle of an element that has all of its properties.
compound
mixture
atom
electron
Two or more atoms chemically combined.
atom
element
molecule
compound
Different substances that are together but NOT chemically combined.
molecule
element
compound
mixture
Two or more different elements chemically combined.
Atom
Molecule
Compound
Mixture
Which of the following is a form of Potential Energy?
Thermal Energy
Electrical Energy
Chemical Energy
Mechanical Energy
Matter is anything that has ________ and takes up space.
Volume
Mass
Energy
Weight
Weight...
is the same thing as mass
is gravity's pull on mass
stays the same if you travel to other planets
all of the above
Which of the following is NOT an element?
Gold
Oxygen
Carbon
Water
Which of the following is a mixture?
Water
Air
Carbon Dioxide
Table Salt
The positive particle located in the nucleus of an atom is called the...
Proton
Neutron
Electron
Positron
The number of protons and neutrons in the nucleus of an atom is called the...
Atomic Number
Atomic Mass
Chemical Symbol
Neutral Number
Which of the following is a model of a carbon atom?
Which of the following is an example of a physical change?
Phosphorous and Oxygen
Fire
Melting Ice
Vinegar and Baking Soda
A change in matter that makes one or more new substances is a chemical change.
True
False
A system in which matter can enter or leave is called a(n)...
Subsystem
Matter System
Open System
Closed System
According to the principle of conservation of mass, the number of atoms before a chemical reaction...
is the same as the number of atoms after the reaction
is more than the number of atoms after the reaction
is less than the number of atoms after the reaction
is more than the number of atoms in the product
Which of the following evidences for a chemical reaction shows a change in energy?
Precipitate
Color Change
Temperature Change
Gas is made
Endothermic reactions release energy and usually feel warm.
True
False
New substances made after a chemical reaction are called...
Reactants
Results
Products
Yields
Which of the following is the correct chemical equation for producing water?
H2 + O2 --> H2O
2H2 + 2O2 --> 2H2O
2H2 + O2 --> 2H2O
H2 + 2O2 --> 2H20
The amount of matter in an object.
Mass
Atoms
Volume
Matter