WorksheetsHonors Chem Test Unit 1-A
Total questions: 22
Worksheet time: 16mins
These are made using your 5 senses and are always true.
Hypothesis
Observation
Prediction
Inference
A scientific ____________ explains a wide range of observations. It is supported by a wide range of evidence but can be changed based new conflicting evidence.
law
theory
observation
method
A series of steps used by scientists to solve a problem or answer a question.
scientific method
recipe
data collection
metric system
A testable explanation to a problem that has not yet been tested.
data
theory
hypothesis
fact
This variable in an experiment is the one being changed by the scientist.
dependent variable
independent variable
data
control group
The name of the information that you get from your experiment (you organize it into charts and graphs).
observations
conclusion
data
variables
hypothesis
Using the atomic masses and relative abundance of the isotopes of nitrogen given below, determine the average atomic mass of nitrogen.
N-14 has a mass 14.003 amu at 99.63%. N-15 has a mass 15.000 amu at 0.37%. Show work.
(a)
Vitellium (Vi) has the following composition. Based on this data, which one is the most naturally abundant?
Vi–188: 187.9122 amu; 10.861%
Vi–191: 190.9047 amu; 12.428%
Vi–193: 192.8938 amu; 76.711%
Vi–188.
Vi–191.
Vi–193.
What is a chemical property of a substance?
Melting point
Boiling point
Reactivity with oxygen
Color
Which of the following best describes a physical change?
Burning wood
Rusting iron
Melting ice
Baking a cake
Identify the chemical change from the following examples.
Dissolving sugar in water
Freezing water into ice
Digesting food
Cutting paper
Which of the following is a chemical property?
Hardness
Odor
Reactivity with acid
Texture
When candle wax melts, it is a ___________________ change.
chemical
physical
transparent
undefined
This variable in an experiment is the one being deliberately changed by the scientist.
dependent variable
independent variable
data
control group
A student sets up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. Identify the independent variable.
distance traveled by the ball
height of the ramp
mass of the ball
weight of the ball
A student sets up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. Identify the dependent variable.
height of the ramp
distance traveled by the ball
mass of the ball
weight of the ball
Match the following parts of the symbol to the correct term
___ 27
a. mass number
___ 13
b. atomic number
___ 3+
c. ion charge
___ 14
d. neutrons
___ protons
e. 13
Match the change to each type of atom
____ Same number of protons and electrons
a. Neutral Atom
____Different number of electrons
b. Ion
____Different number of neutrons
c. Isotope
