Measurement
What tool do we use to measure length?
meter stick/ruler
Which has more energy?
a block of ice or a glass of water?
Which of these are a homogenous mixture?
solution
suspension
colloid
solution
Where are neutrons located?
the nucleus of the atom
What is the unit for energy?
Joule
How do you know how far to round when you have a measurement?
Mark what the device shows, plus estimate one more place value after
Describe a gas in terms of volume and shape
no set volume
no set shape
On the pH scale, which numbers are bases?
7.1-14
Where are metals on the periodic table?
to the left of the staircase
What is the name for group 18 on the periodic table
noble gases
What unit do we use to measure volume?
mL or L
What is the law of conservation of energy?
Energy cannot be created or destroyed, only converted from one form to another
What is the difference between adhesion and cohesion
adhesion is water sticking to other things
cohesion is water sticking to itself
What kind of element is this atom?
14 protons, 13 neutrons, 12 electrons
Silicon
What is the difference between physical and chemical changes?
physical change- only physical properties change
Chemical change- changes into a new material
Change 4.39*104 into expanded notation
43,900
Name 2 examples of potential energy
*Teacher will grade
gasoline
cat on a tall bookshelf
Explain dispersion
covalent
the molecules remain together but break into smaller pieces
Find the mass number
an Fluorine atom has 9 electrons, 10 neutrons, and 9 protons
10 neutrons+ 9 protons
19
What types of heat transfer require matter be used?
conduction and convection
3.21 * 10-5
How are kinetic, potential, and mechanical energy related?
All forms are converted into each other
Explain dissociation
ionic
the ions individually separate
What is the charge of the atom?
13 electrons, 14 neutrons, 19 protons
19-13= +4
How are temperature and heat different?
Temperature measures KE
heat is transfer of KE