Which is an element?
carbon dioxide
water
oxygen
rust
Which shows velocity?
a boat moving at 50 kilometers per hour
a truck going down the highway for 30 minutes
a car traveling at 45 miles per hour northeast
a train going south
Which part of an atom has the least mass?
electrons
nucleus
neutrons
protons
The center of an atom
neutron
molecule
nucleus
electron
Which list shows things that are made up of atoms?
helium, gold, water, sound
cow, pencil, strawberry, oxygen
paper, computer, light, ants
carbon dioxide, milk, a brick, heat
The positive subatomic particle is
micron
proton
neutron
electron
Which is a compound?
rust
oxygen
carbon
iron
What is a substance that is only made up of one kind of atom?
compound
element
electron
proton
The element hydrogen has an atomic number of 1. What does this tell us?
A hydrogen atom has 1 neutron in its nucleus
A hydrogen atom has 1 electron orbiting the nucleus
A hydrogen atom has 1 proton in the nucleus
A hydrogen atom has 1 nucleus
Which statement about atoms is true?
electrons have a negative charge
protons have no charge
electrons are found in the nucleus
neutrons have a negative charge
Which is the measure of the mass of an object?
43 minutes
99 inches
71 mL
67 g
What does each individual sphere represent in this model?
a molecule
an atom
a proton
a nucleus
Which object will sink when placed in water?
Object C - mass=51 g, volume = 60 mL
Object B - mass=87 g, volume=90 mL
Object D - mass=22 g, volume=33 mL
Object A - mass=49 g, volume=33 mL
What kind of substance is made up of more than one kind of atom?
nucleus
compound
element
proton
Everything in the universe is made up of --
energy or light
matter or water
matter or energy
air or water
Which is not made up of atoms and is not matter?
water
a rock
oxygen
light
Which one is a molecule, but not a compound?
O2
CO2
NaCl
Fe2O3
Which is an element?
milk
carbon
water
grass
What does the atomic number tell us about a atom?
the number of electrons outside the nucleus
the number of protons in the nucleus
the number of atoms in the world
the number of neutrons in the nucleus
Which tool can be used to measure the volume of a box?
scale
graduated cylinder
ruler
beaker
What two subatomic particles are found in the nucleus of a an atom?
electrons & protons
protons only
protons & neutrons
neutrons & electrons
Which is a compound?
water
oxygen
hydrogen
carbon
What is NOT matter, and NOT made up of atoms?
liquid
solid
gas
energy
A water molecule has two atoms of hydrogen and 1 atom of oxygen. If one more atom of oxygen is added to the molecule, what would happen?
it would be a bigger molecule of water
it would no longer be a molecule of water
it would turn into saltwater
it would be a smaller molecule of water
Which two models show the nucleus of atoms from the same element?
3 and 4
2 and 4
1 and 4
1 and 2
A molecule of salt has 1 atom of sodium and 1 atom of chlorine. What would happen if an atom of oxygen was added to the molecule of salt?
it wouldn't be a molecule of salt anymore
it would be a larger molecule of salt
it would turn into a molecule of sugar
it would turn back into an atom
Which tool can be used to find the volume of a irregularly shaped object, like a rock or a shell?
scale
stopwatch
graduated cylinder
ruler
A sample of matter is made up of identical particles. What could the sample be?
a solid
an element
a proton
a compound
The 3 states of matter are --
mass, volume, weight
electron, proton, neutron
solid, liquid, gas
molecule, atom, element