The Atom
What are the three components of the atom?
electrons, protons, neutrons
This is called the "good" ozone.
stratospheric ozone
He believed all matter was made up of four elements-- earth, air, fire, water
Aristotle
What is the first step of the scientific method?
Observation.
TRUE or FALSE. Nuclear reactions use electrons.
False
The nucleus is made of what components?
protons and neutrons
These are the two types of natural resources.
renewable and nonrenewable resources
He came up with the atomic theory
John Dalton
If your conclusion is that your data did not support your hypothesis what should you do?
Revisit your hypothesis, change it and test again.
TRUE or FALSE. Nuclear reactions create a large amount of energy
TRUE
Is most of the mass of an atom located in the nucleus or outside the nucleus?
Inside the nucleus. There are neutrons and protons. Outside only has electrons
These are used to produce electricity and energy.
nuclear power plants
This man discovered the electron
Thomson
TRUE or FALSE. Anyone can use the scientific method.
TRUE
In this reaction, one substance is converted into another, but atoms never change identity
Chemical reactions
This element has one valence electron to share
Hydrogen
List two health concerns of "bad" ozone or smog.
Respiratory irritant: coughing, throat irritation, difficulty breathing
He discovered protons and the nucleus
Rutherford
What do you do after your research has supported your hypothesis?
conclude and then share your research with others!
In this reaction, rates are influenced by temperature, concentration, and catalyst.
Chemical reactions
An atom or molecule with a net electric charge (+) or (-)
Ion
TRUE or FALSE. Ecological footprint measures the CO2 emitted by nature
FALSE. It measures the renewable and nonrenewable resources used.
He suggested that electrons are in energy levels in atoms.
Bohr
What is the proper way to write a formal hypothesis?
If then statements
In this reaction, rates depend on the concentration of the element.
Nuclear reactions