Which is by far the smallest subatomic particle (proton, neutron, electron)?
Electron
100
What type of elements have properties of both metals and nonmentals?
Semi-metals (or metalloids)
100
What is the definition (formula) of density?
Mass per unuit volume
200
What is an Astronomical Unit (AU)?
The distance from the Earth to the Sun
200
What would cause and object cange velocity (speed and/or direction)?
Unbalanced forces
200
The atomic number refers to the number of ____________
protons (in an atom)
200
Who gave us the first periodic table of the elements?
Russian scientist - Mendeleev
200
What direction does the bouyant force push?
Up
300
What is the color ofthe hottest surface star temperature.
Blue
300
What is the force that holds the planets and Sun together as a solar system within the Milky Way Galaxy.
Gravity
300
Which subatomic particle has no charge?
neutron
300
What is the mass number of an element - the larger of the two numbers around the symbol?
the number of protons and neutron in the nucleus
300
The mass of an object is 86.8 grams and its volume is 6.2 mL. What is it's density?
14 g/mL
400
What is between the 4 Inner Planets and the 4 Outer Planets?
Asteroid belt
400
What is the force that opposes motion?
Friction
400
What do we call a regular, repeating three-dimnesional arrangement of atoms?
crystal stucture
400
What do we call an atom with a different number of electrons (a 'charged particle')?
An ion
400
What is the density of water?
1 g/mL
500
What is the term used to name a cluster of stars, nebulae, gases, dust and planets?
Galaxy
500
An object moving along a strait path experiences a force of 23.5 newtons west and another force of 12.4 newtons east. What is the net force on the object?
11.1 newtons west
500
What do we call atoms with different numbers of neutrins that the normal?
Isotopes
500
What is the element that is totally associated with living things - or things that were once alive - because it bonds with itself and other elements in many different ways?
Carbon
500
What is the name of the way we find density of a irregular shaped object? When we put in a liquid in a graduated cylinder - and get get mL.