Font size
WorksheetsUnit 1 Test 2021
Total questions: 28
Worksheet time: 16mins
Which phrase best describes an atom?
substance made of different elements
smallest basic unit of matter
substance that includes covalent bonds
contains electrons in its nucleus
How are atoms held together in molecules?
They form covalent bonds
They form ions
They break hydrogen bonds
They combine to form polymers
Which property of water is the result of hydrogen bonds?
polarity of water molecules
high specific heat
low boiling point
no cohesion among water molecules
Which property of carbon makes it the "building block of life"?
its covalent bonding
its ability to dissolve substances
its specific heat
its hydrogen bonding
What are the four main groups of carbon-based molecules?
starches, cholesterol, fatty acids, and amino acids
sugars, cellulose, triglycerides, and monosaccharides
polysacharides, sugars, oils, and polymers
carbohydrates, lipids, proteins, and nucleic acids
What is the term for the substances that are changed during a chemical reaction?
products
catalysts
enzymes
reactants
The function of a catalyst in a chemical reaction is to increase the
reaction rate
activation energy
pH
number of substances
An atom becomes an ion when its number of protons charges
True
False
Some ions are positively charged, and some ions have no charge
True
False
The formation of an ion results in a full outermost energy level
True
False
Polar molecules have two regions with a slight positive charge
True
False
Water is a polar molecule
True
False
Which property allows water to resist changes in temperature?
high specific heat
cohesion
adhesion
polarity
Which property causes water to form beads?
high specific heat
cohesion
adhesion
polarity
Carbon atoms form the building blocks of most living things
True
False
Carbon atoms can form covalent bonds with up to four other atoms
True
False
Activation energy is the energy required to
complete a chemical reaction
start a chemical reaction
produce a catalyst
produce the reactants
Which of the following can reduce the amount of energy needed for a chemical reaction to take place?
reactant
product
catalyst
hydrogen bond
What happens to the speed of a chemical reaction when a catalyst is present?
It speeds up
It slows down
It stays the same
It becomes erratic
Which is the best operational definition for the independent variable for the experiment?
Students are asked to sleep at different intervals the night before the test to see if it had an impact on the score they would earn.
Students are asked to sleep at different intervals the night before the test to see if it had an impact on their mood towards school.
Students will change how much they sleep
Changing sleep might hurt your grades.
An example of adhesion is
the bubble a water drop forms
capillary action: water moving up a plant root
high surface temperature
Water is clear so you can see through it
What is the average Stacy earned on her Math tests?
Test 1: 75%
Test 2: 88%
Test 3: 90%
Test 4: 67%
72%
80%
86%
92%
In the penny lab why was it important to do multiple trials and take the average?
In case you accidentally messed up the average would give you a better idea of the overall outcomes
Because the teacher like to have you do extra work
You could explain an outliner and how it might impact the data
To have you work on math skills
What CBM was not tested in the McMush lab
Carbohydrates
Lipids
Proteins
Nucleic acids
When looking at a water molecule the negative pull is at what end?
near the hydrogens
near the oxygens
near the hydrogen
near the oxygen
When making a graph for Biology it is important to have the correct variables on each axis. What is the correct order
Ind on the X axis Dep on the Y axis
Ind on the Y axis Dep on the X axis
It doesn't matter a graph is a graph
What indicator would you use to test if Monosaccharides were present?
Lugol's
Benedict's Solution
Biurets Solution
You would taste it to see if it were sweet
Why would you use the testing reagent Biuret's Solution?
To see if Protein was present
To see of Carbohydrates were present
To see if Fat was present
To determine if Nucleic Acid was present
