Classifying Matter
Which of the following is an element?
Water, Carbon Dioxide, Oxygen, Ammonia
Which of the following is a physical change?
Burning, Rusting, Oxidation, Freezing
A substance with a definite shape and definite volume is a
Solid
Substances that are formed as a result of a chemical reaction are called
products
The atomic number of an element is determined by the number of
protons in an atom
The smallest particle matter can be divided into is the
Atom
Which of the following is an example of a chemical property?
Flammability
A puddle dries up by the process of
Evaporation
Which of the following is the best evidence for a chemical reaction?
The formation of a new substance
In an endothermic reaction, energy is
absorbed
The positively charged particle in an atom's nucleus is the
Proton
An exothermic change is
a change in which energy is released.
The temperature when a liquid turns into gas is
100 c
The fact that matter is neither created nor destroyed in any chemical or physical change is called the
The Law of Conservation of Mass
Which part of the atom is negatively charged?
The Electron
The formula for calculating density is
Density =
Mass / Volume
A group of two or more atoms held together by chemical bonds.
A Molecule
According to Boyle's law, the volume of a gas increases when its
pressure decreases
How can you balance a chemical equation?
Change the coefficients
A balloon filled with air does not rise as high as a balloon filled with helium. What does this tell you about the density of helium?
Helium is less dense then air
The amount of matter in an object is a measure of its
Mass
Butter is melted in a pan. Which of the following is true about the change?
It is a physical change that absorbs energy.
If the sun shining through windows heats the air in a sealed room, what happens to the air pressure in that room?
Pressure Increases
The energy stored in the chemical bonds between atoms is called
Chemical Energy
The definition for temperature is__________________________.
A measure of the average energy of motion of the particles of a substance