Density and Chemistry
True or False:
I ball that has a density of 1.5 g/ml will float.
False
(only items with a density less than 1.0 will float)
This type of particle has a negative charge.
Electron
True or False:
Heat flows from a cold object into a warmer object.
False, heat always flows from a warmer object to a cooler object.
A circuit has 3 bulbs attached to it and one bulb burns out. When the bulb burnt out, all the bulbs went out. This is an example of a _________ circuit.
Series
Found on the left side of a chemical equation
Reactant
True or False:
Density describes the how closely packed the particles of matter are.
True
This element has 7 protons.
Nitrogen
Temperature is to average as Thermal energy is to ______.
sum
How many volts would be needed to have 3 amps move through a 3 ohms resistor?
9 Volts
An area that contains no matter.
Vacuum
Calculate the density of an object that has a mass of 160 grams and a volume of 40 mL?
4 g/ml
This element has a mass of 7.
Beryllium
The method of heat transfer is most effective in fluids.
Convection
True or False:
Mechanical waves travel the fastest in a vacuum.
False
Electromagnetic waves travel the fastest in a vacuum.
Matter that can conducts electricity, respond to a magnetic fields, and consists of electrically charged particles called ions.
Plasma
CFC's are chemicals that are banned by the FDA, because scientists linked them to the depletion of the Ozone layer in our atmosphere. One molecule of CFC has the following chemical formula CF2Cl2. Would you classify CFC as an Element or a Compound?
Compound
There are __ electrons in the first orbital of an atom.
2
Why does a giant iceberg have more thermal energy than a small cup of coffee
Because the iceberg has more mass
As the frequency of an electromagnetic wave increases, the __________ of the electromagnetic wave also increases.
Energy level
The potential difference between 2 electric fields.
Voltage
This type of matter has all particles equally distributed throughout.
Homogeneous Mixture
Picture Question:
What is wrong with this atom of Carbon?
It is missing a proton. Carbon has the atomic number of 6 and therefore should have 6 protons.
A 0.5 kilogram aluminum pot is used to cook some food. The temperature of a pot is raised from 20oC to 120oC when it is placed on the burner. If aluminum has a specific heat of 900, how much thermal energy does the pot gain?
45,000 Joules
Picture Question:
The straw placed into this cup of water looks bent and broken. What wave interaction explains why the straw looks like this?
Refraction
This type of wave moves parallel to the direction of travel.
Longitudinal wave