Atoms
what is the center of an atom called
nucleus
What is the unit used to measure energy
joule
What is the force that pulls objects towards earth
Gravity
What is a sign that a chemical reaction has taken place
color change,g as produced, temperature change
what do we call the highest point of. Wave
crest
What particle in an atom has a negative charge
Electron
What kind of energy is stored due to an objects position
Potential energy
What is the formula for speed
Distance/time
What is the starting substance in a chemical reaction called
reactant
What type of wave is sound
longitudinal wave
What is the atomic number of an element
the number of protons
moving car, running water
What type of force slows objects down as they move
friction
What type of reaction combines two elements into one compound
Synthesis reaction
What is the unit to measured frequency
hertz
What are the horizontal rows on the periodic table called
Periods
What energy transformation happens in battery-powered flashlights
what is chemical to electrical to light energy
What is the unit of force
newton
In a balanced chemical equation what must be same on both sides
Number of atoms
pitch
What do you call atoms of the same element with different numbers of neutrons
isotopes
State the law that says energy cannot be created and destroyed
what is the law of conservation of energy
What does newton 2nd law state
force = mass x acceleration
What law says matter cannot be created or destroyed in a chemical reaction
Law of conservation of mass
What happens to the wavelength when frequency
It gets shorter