Chemistry
What is an acid?
Any substance that has a pH less than seven.
What element has no neutrons in it?
Hydrogen
When light bends as it enters a different medium the process is known as what?
Refraction
The electric currents are usually measured by what unit?
Amperes
What process is used by the sun to produce energy?
Nuclear fission
What is an Alloy?
Mixtures containing at least one metal.
What are isotopes?
Atoms that have the same atomic number but a different mass number.
Who created the three laws of motion?
Isaac Newton
Electric power is typically measured in what?
Watts
What instrument uses pressure to predict the weather?
Barometer
What is an atom?
The smallest recognize division of a chemical element that was made up of three particles.
What is glass made out of?
Sand
Electric resistance is typically measured in what units?
Ohms
What does DC stand for when talking about electricity.
Direct Current
Which man was the first to design a periodic table?
Dmitir Mendeleev
What is an atom made up of?
Protons, neutrons, electrons.
What is a buffer?
A solution that resists a change in pH when an acid or a base is added.
What is the earths primary source of energy?
The sun
A unit of electromotive force is called what?
Volt
Which value is used to create the modern periodic table?
atomic number
What is the chemical formula of water?
H2O
What two products are created during neutralization reaction?
Water and a salt.
Do conductors have a high or low resistance?
Low
If an object is in free fall what is the only force that is acting upon it?
Gravity
What name is given to the rows on the periodic table?
Periods