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Unit I Test: Chemistry of Life

Total questions: 70

Worksheet time: 1hrs 10mins

Name
Class
Date
1.

Which of the following is the chemical formula for Magnesium chloride?

a)

Cl2Mg

b)

ClMg

c)

MgCl

d)

MgCl2

2.

How many electrons does the magnesium atom hold?

a)

10

b)

12

c)

15

d)

17

3.

How many valence electrons does the magnesium atom hold?

a)

0

b)

1

c)

2

d)

3

4.

Which Bohr's model represents magnesium?

a)
b)
c)
d)
5.

Match the correct ion type to the atom.

a)

Magnesium

1.

cation

b)

Chlorine

2.

anion

c)

Argon

3.

element

6.

What is the substance that forms when covalent bonds unit atoms?

a)

enzyme

b)

ion

c)

isotope

d)

molecule

7.

What is the name of a protein that can catalyze a chemical reaction?

a)

enzyme

b)

ion

c)

isotope

d)

molecule

8.

What is the name of an atom that has gained or lost an electron?

a)

enzyme

b)

ion

c)

isotope

d)

molecule

9.

The center of an atom is known as a(n) ___________.

a)

control center consisting of protons and neutrons

b)

nucleus consisting of protons and neutrons

c)

control center consisting of protons and electrons

d)

nucleus consisting of protons and electrons

10.

Using the pH scale, which substance is the strongest acid?

a)

Lemon

b)

Coffee

c)

Milk

d)

Baking Soda

11.

What is the number of electrons for carbon-12?

a)

4

b)

5

c)

6

d)

7

12.

What is the number of neutrons for carbon-13?

a)

4

b)

5

c)

6

d)

7

13.

What is the number of protons for carbon-14?

a)

4

b)

5

c)

6

d)

7

14.

In a solution, a solute is dissolved in a ________.

a)

solven

b)

solvent

c)

solid

d)

dilution

15.

What property of water molecules causes surface tension?

a)

adhesion

b)

cohesion

c)

heat capacity

d)

solubility

16.

The positively charged particle in an atom is called a

a)

neutron

b)

ion

c)

proton

d)

electron

17.

Two or more different atoms are combined in definite proportions in any

a)

symbol

b)

isotope

c)

element

d)

compound

18.

Proteins are polymers formed from the monomers...

a)

lipids

b)

amino acids

c)

carbohydrates

d)

nucleic acids

19.

Nucleotides consist of a phosphate group, a nitrogenous base, and a...

a)

fatty acid

b)

5-carbon sugar

c)

6-carbon sugar

d)

lipid

20.

In a chemical reaction, a reactant binds to an enzyme at a region known as the...

a)

catalyst

b)

product

c)

substrate

d)

active site

21.

Which of the following molecules is made up of glycerol molecule combined with fatty acids?

a)

lipid

b)

sugar

c)

starch

d)

nucleic acid

22.

What can change the shape of an enzyme?

a)

temperature

b)

pH

c)

salinity

d)

glucose

23.

Who created the periodic table of elements?

a)

Dimitri Mendeleev

b)

Thomas Edison

c)

Nikola Tesla

d)

Gregor Mendel

24.

How was the periodic table arranged?

a)

atomic number

b)

atomic mass

c)

size

d)

electronegativity

25.

Why is water considered to be a polar bond?

a)

Oxygen's electrons being more negatively charged

b)

Hydrogen's electrons being more negatively charged

c)

Hydrogen and Oxygen's electrons are unequally shared

d)

Hydrogen and Oxygen's electrons are equally shared

26.
What is the first step in the scientific method?
a)
Make an observation --> Question
b)
Design and conduct an experiment
c)
Make an hypothesis
d)
Share your results
27.
The summary at the end of an experiment that explains the results is... 
a)
conclusion
b)
procedures
c)
materials
d)
responding variable
28.
A testable prediction about a scientific investigation is a(n)
a)
Question
b)
Observation
c)
Hypothesis
d)
Experiment
29.

Stephen predicted that seeds would start to grow faster if an electric current traveled through the soil in which they were planted.

What part of the scientific method is this?

a)

ask a question

b)
test the hypothesis with an experiment
c)
form a hypothesis
d)

analyze results and draw conclusions

30.

Susan said, “If a geranium plants are fertilized, then they will have more flowers.”

What part of the scientific method is this?

a)

ask a question

b)

test the hypothesis with an experiment

c)

form a hypothesis

d)

analyze results and draw conclusions

31.

Bob read about growing plants in water. He wanted to know, "How plants could grow without soil?" What is Bob doing?

a)

coming up with a question

b)

test the hypothesis with an experiment

c)

form a hypothesis

d)

draw conclusions

32.
Information you obtain through your senses, such as touch, sound and sight.
a)
observation
b)
hypothesis
c)
question
d)
conclusion
33.

A prediction or guess based on observations, written in an "if, then" statement.

a)
data
b)
scientific process
c)
hypothesis
d)
question
34.

What is the last step of the scientific method?

a)

hypothesis

b)

observe

c)

communicate

d)

question

35.
A series of steps used by scientists to solve a problem or answer a question. 
a)
scientific method
b)
recipe
c)
data collection
d)
metric system
36.

Which words are the appropriate ones to use in this sentence, "In an experiment, you are investigating how the independent variable ____________ the dependent variable, creating an____________ ."

a)

affects, effect

b)

effects, affect

c)

effects, effect

d)

affects, affect

37.

"Effect" and "affect" are two confusingly similar words. Which one means - to cause a change in something?

a)

effect

b)

affect

38.
When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?
a)
Dependent
b)
Independent
c)
Control
d)
Compound
39.
What would the INDEPENDENT variable be in an experiment testing which types of paper airplane goes furthest?
a)
the paper used
b)
the type of paper airplane
c)
the distance of each plane's flight
d)
how hard the plane is thrown
40.

What is the independent variable in this research Question: "How does the type of gasoline affect the car speed?"

a)

Type of gasoline

b)

which car the gas is put into

c)

how fast the car can drive

d)

how much gas is put into the car

41.
Ms. S set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. Identify the independent variable.
a)
Distance traveled by the ball
b)
Height of the ramp
c)
Mass of the ball
d)
Who set up the experiment (Ms. S, etc)
42.
Ms. S set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. What is the dependent variable?
a)
Distance traveled by the ball
b)
Height of the ramp
c)
Mass of the ball
d)
Where the experiment took place.
43.

What is an Independent Variable?

a)

It is what the scientist changes (manipulates) in the experiment.

b)

It is what changes as a result of what the scientist changes (manipulates).

c)

It is something that stays the same.

44.

What is the Dependent Variable?

a)

It is what the scientist changes (manipulates) in the experiment.

b)

It is what changes as a result of what the scientist changes (manipulates).

c)

It is something that stays the same.

45.
True or False - Experiments should have many independent variables.
a)
TRUE
b)
FALSE
46.
When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?
a)
Dependent
b)
Independent
c)
Control
d)
Compound
47.
The part of the experiment that remains the same for the control and experimental group.
a)
constants
b)
control
c)
independent
d)
dependent
48.

Research Question: Does the type of gasoline put in a car affect how fast the car can drive.

What is the independent variable?

a)

Type of gasoline

b)

which car the gas is put into

c)

how fast the car can drive

d)

how much gas is put into the car

49.
If I study for my scientific method quiz, then I will have a better test score. What is the dependent variable?
a)
Scientific Method
b)
Studying
c)
Independent variable
d)
Test score
50.

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid: water, apple juice, or milk. What should be kept constant? 

a)
type of plant, flower pot,  soil, and amount of sunlight
b)
water, apple juice, milk
c)
only the amount of sunlight
d)
type of plant only
51.

Reorder the following of the scientific method:

a)

Question

b)

Hypothesis

c)

Create/Test the Hypothesis

d)

Analyze/Interpret Data

e)

Communicate Conclusion

1)
2)
3)
4)
5)
52.

What is the difference between quantitative and qualitative data?

a)

Quantitative is collecting numbers.

b)

Quantitative is about description.

c)

Quantitative cannot interpret data with graphs.

d)

Qualitative is about numbers.

53.

What is wrong about this graph?

a)

Independent Variable

Label

b)

Dependent Variable

Label

c)

Key

d)

Title

54.

Susan hypothesized, "If bacteria is identified in creek and forest biomes, then they'll be more growing in the creek biome."

Which statement matches best?

a)

The hypothesis is supported due to 8 counts more of bacteria growth in the forest biome.

b)

The hypothesis is rejected due to 8 counts more of bacteria growth in the forest biome.

c)

The hypothesis is supported due to 6 less counts of bacteria growth in the forest biome.

d)

The hypothesis is supported due to 6 less counts of bacteria growth in the creek biome.

55.

Which statement is supported by the data?

a)

No competition for food exists within any of the three bird species.

b)

At least 3 different species of worms are eaten by the 3 bird species.

c)

Selection pressure from the three bird species will result in a worm population with only small & large worms.

d)

Less competition between the 3 bird species will be observed if a range of differently sized worms is available.

56.

Isotopes of an element contain...

a)

equal numbers of protons and neutrons

b)

the same number of protons but a different number of neutrons

c)

the same number of neutrons but a different number of protons

d)

the same number of protons but a different number of electrons

57.

Ionic bonds form when...

a)

electrons are shared equally between to atoms

b)

electrons are shared unequally between two atoms

c)

electrons are transferred from one atom to another

d)

slight attractions develop between oppositely charged regions of nearby molecules

58.

What two subatomic particles form the nucleus of an atom?

a)

protons and neutrons

b)

protons and electrons

c)

isotopes and neutrons

d)

isotopes and electrons

59.

All atoms of the same element contain the same number of...

a)

neutrons

b)

protons

c)

neutrons & electrons

d)

neutrons & protons

60.

Attractions between oppositely charged regions of nearby molecules are called...

a)

ionic bonds

b)

covalent bonds

c)

van der Waals forces

d)

polar bonds

61.

The attraction between the hydrogen atom on one water molecule and the oxygen atom on another water molecule is called a(n)...

a)

ionic bond

b)

covalent bond

c)

polar bond

d)

hydrogen bond

62.

Acids...

a)

have a pH below 7

b)

form H+ in solution

c)

have a higher H+ concentration than pure water

d)

all of the above

63.

In polar molecules such as water, there is an uneven distribution of...

a)

solvent

b)

electrons

c)

energy

d)

temperature

64.

In a salt solution, what happens to sodium (Na) and chloride (Cl) ions?

a)

They stay near the original salt crystal.

b)

They become evenly dispersed in the water.

c)

They bond with each other, forming a new salt crystal.

d)

They bond with each other to form a solvent?

65.

How would the pH of a strong base (pH 14) change with the addition of a buffered acid (pH 5)?

a)

The base's pH would be lower.

b)

The base's pH would be higher.

c)

The base's pH would become neutral

d)

The base's pH would remain the same.

66.

The group of macromolecules that serves as the main source of energy for living things is...

a)

carbohydrates

b)

lipids

c)

nucleic acids

d)

proteins

67.

The group of macromolecules that stores and transmits genetic information is...

a)

carbohydrates

b)

lipids

c)

nucleic acids

d)

proteins

68.

The major functions of proteins in cells do include...

a)

regulating cell processes

b)

transporting substances

c)

storing energy

d)

controlling reactions

69.

The monomers in a polymer are like the...

a)

bonds in a molecule

b)

links in a chain

c)

electrons in an atom

d)

solvent in a solution

70.

Proteins and carbohydrates are similar in that both...

a)

are polymers containing carbon, hydrogen, and oxygen.

b)

are monomers containing carbon, hydrogen, and oxygen.

c)

are polymers containing carbon, hydrogen, and nitrogen.

d)

are monomers containing carbon, hydrogen and nitrogen.

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