Free Printable Finals Sp 2021

1.

Which inequality correctly compares the masses of electrons, protons, and neutrons?

a)

p⁺ = n⁰ = e^-

b)

n⁰ < e^-

c)

p⁺ > e^-

d)

e^- > n⁰

2.

1.What question did the scientists who collected this data want to answer?

a)

Are there more earthworms in the soil in the spring or in the fall?

b)

What is the effect of plowing soil on the number of earthworms?

c)

How is the size of earthworms affected by the seasons?

d)

Does plowing soil affect how fast earthworms grow?

3.

Kevin is identifying samples of three unknown metals. One of the properties he will use for identification is the density. The table shows the mass and volume for each sample. Kevin knows that the units of density are grams per cubic centimeter (g/cm³). Calculate the density for sample 2 and find the answer below.

a)

10.49 g/cm³

b)

4.507g/cm³

c)

4.507 g/cm

d)

10.49 g/cm

4.

Mr. Lee wants to confirm the metal used in a ring with a mass of 26.055 g. The volume of the ring is 2.54 cubic centimeters (cm³). What is the metal composition of the ring?

a)

Sterling silver

b)

18-ct white gold

c)

Pure gold

d)

Platinum

5.

a)

Graph A

b)

Graph B

c)

Graph C

d)

Graph D

6.

What do the data in this graph show?

a)

Unplowed soil has more earthworms than plowed soil.

b)

Plowed soil has more earthworms than unplowed soil.

c)

Plowing of soil has no effect on the number of earthworms.

d)

The number of earthworms cannot be predicted

7.

(a)

8.

What was the net loss in glacier ice thickness between the years 1970 and 1996? (Type your answer as a number only)

(a)

9.

Jordan has a mixture of two solids that he has to separate. The solids are small granules that are the same size but different colors. She knows that the silver granules are aluminum and the white granules are salt. Which procedure is the most reliable way to separate the mixture?

a)

Dissolve the mixture in a universal solvent and filter. Then evaporate the solvent to retrieve the salt.

b)

Dissolve the mixture in a universal solvent and filter.

c)

Pass a magnet over the mixture.

d)

Sift the mixture through fine wire mesh.

10.

A mixture of coffee grounds and coffee being poured through filter paper. Which property of the filter paper is being used to separate them out the coffee grounds from the molecules?

a)

Size of particles

b)

polarity of the molecules

c)

Size of pores in the filter

d)

Temperature of the water

11.

In this graph, what is the dependent variable?

a)

Population

b)

Day

c)

Species 5

12.

Carla needs exactly 100.00 grams of sulfur powder for an experiment. The picture shows the mass on the scale so far. She did not zero the scale before starting. Carla knows that the weighing paper weighs 5.10 grams. How much more sulfur powder does Carla need?

(a)

13.

Sun Li investigates the time for 10 grams of table salt to dissolve in 100 milliliters of water. She sets up six beakers, using the information in the table. In which beaker would salt dissolve the fastest?

(a)

14.

Four student groups pour equal masses of sugar into equal volumes of water. The table lists the differences in conditions for each group. Which group would represent the Hypothesis that decreased surface area and low heat will dissolve solutes faster?

(a)

15.

The graph shows the temperature changes in a sample of water that is heated steadily from -40°C. Which process is happening in section 3 of the graph?

a)

Ice is getting warmer.

b)

Ice is melting.

c)

Ice is in a liquid state.

d)

Ice is changing to vapor and then to a liquid.

16.

When a Bunsen burner is lit; why is the presence of a flame considered to be an indication of a chemical reaction?

a)

A flame indicates an increase in molecular kinetic energy.

b)

A flame indicates a phase change.

c)

A flame indicates new physical energy is forming.

d)

A flame indicates a decrease in chemical energy.

17.

In science class, a teacher heats a sample of white wax. As the wax warms, it turns to a clear liquid. When the teacher allows the wax to cool, it hardens again, retaining its original color and mass. Heating the wax is classified as a physical change because it

a)

cause a permanent change of energy.

b)

does not change how atoms are bonded to one another

c)

change the mass in the wick.

d)

does not involve the change of molecular bonds.

18.

A student wanted to test some objects to see if they would sink or float. What conclusion can be made from her investigation?

a)

The marble is less dense than the water and the mineral oil

b)

The marble is not denser than the water and the mineral oil

c)

The block is less dense than the water and the mineral oil

d)

The block is more dense than the water and less dense than the mineral oil

19.

Which of the following will happen when a mixture of salt and water are left for a few days?

a)

the water will evaporate

b)

the salt will evaporate with the water

c)

nothing will happen. The salt and water will remain in the cup

d)

once the water evaporates the salt will be left in the container

20.

Students put 2 ice cubes on separate plates. One ice cube had a mass of 20 grams. The other had a mass 0f 30 grams. Which result would be the same for both ice cubes in this investigation?

a)

The time it took each ice cube to melt completely

b)

The temperature at which each ice cube melted

c)

The change in molecular motion of the ice on each plate

d)

The total volume of each ice cube

21.

What state & phase is the object likely in from points D to E?

a)

Solid, melting

b)

Liquid, melting

c)

Gas, vaporizing

d)

Liquid, vaporizing

22.

What is happening to the particles in the substance between points C and D?

a)

Melting

b)

Freezing

c)

Speeding Up

d)

Slowing Down

e)

Spreading out

23.

Tony found an old iron cannonball that had rust on it. He determined that the iron had been exposed to air and water, which caused the rust. Which statement explains the type of change represented by this reaction?

a)

The reaction represents a chemical change because the rust is just a mixture of water and iron.

b)

The reaction represents a chemical change because the iron oxide has a different melting point than iron.

c)

The reaction represents a chemical change because both the original cannonball and the rusted cannonball are solids.

d)

The reaction represents a chemical change because iron oxide is a new substance formed on the cannonball.

24.

Darlene places a bolt in the graduated cylinder to find its volume. Its starting volume is 85.5mL. After she puts the bolt in the graduated cylinder the water level rose to 115.5mL. What is the volume of the bolt?

(a)

25.

A group of students researched the melting points of some representative elements and made up cards containing the symbol and melting point of each element. They then grouped the cards together to make the portion of the periodic table shown. Which conclusion best fits the group’s data?

a)

Elements in periods 4,5, and 6 have melting points that increase and then decrease with increasing atomic number.

b)

A) Group 2 metals have melting points that decrease with increasing atomic number.

c)

A) Elements in a group have melting points that decrease with increasing atomic number.

d)

A) Elements in all groups metals have melting points that decrease with increasing atomic number

26.

A group of students measures the period of a pendulum while varying the pendulum length and mass. Their results are shown in the table. Which conclusion is best supported by their data?

a)

Increasing the mass of a pendulum decreases its period.

b)

Increasing the mass of a pendulum does not affect the period.

c)

Increasing the length of a pendulum decreases its period.

d)

Increasing the length and the mass of a pendulum causes an increase in its period

27.

Phillip watches a burning log in the fireplace. He makes these observations:

I. The fire gives off heat.

II. .There is a strong smell of smoke.

III. Heat waves appear in the air above the log

IV. Light is emitted where there are flames.

V. Ashes form from the logs.

Which of Phillip’s observations are conclusive evidence that the burning log undergoes chemical changes and not just a physical change?

a)

observations I and V only

b)

observations II, III, and V only

c)

observations I, III, and V only

d)

observations II, IV, and V only

28.

Holly is examining an isotope. She determines that each atom has 56 protons, 56 electrons, and 32 neutrons. What is the mass number for this isotope?

(a)

29.

Which of the following correctly describes the locations of the P⁺, e^-, n⁰ subatomic particles of an atom?

a)

P⁺ and n⁰ are in the nucleus and the e^-are in the outer valence shell

b)

P⁺ and n⁰ are in the valence shells and the e^-are in the nucleus

c)

P⁺, e^-, and n⁰ are in the nucleus and the e^-are in the nucleus

d)

e^-, and n⁰ are in the nucleus and the P⁺are in the nucleus

30.

The diagram shows an outline of the periodic table with four elements labeled. Which elements would form an Ionic bond?

a)

1&4

b)

2&3

c)

3&2

d)

4&2

31.

A Bohr model of an unknown element shows 4p⁺. What element is being diagrammed in the model?

a)

Oxygen

b)

Lithium

c)

Beryllium

d)

Carbon

32.

Dr. Peterson does an experiment to research the growth rate of mice. He has two groups of mice. He feeds one group a type of food and adds chemical A, which is supposed to increase the growth rate. The other group he feeds the same food without chemical A added. His research shows that chemical A increases the growth rate by .005%. He does the experiment 4 times and comes up with different amounts each time that never went higher than the original percent.

Dr. Peterson concludes that chemical A does increase the growth rate of mice. Is Dr. Peterson's conclusion supported by scientific knowledge?

a)

Yes; his data showed an increase in growth percentage, even though it was a small and variable amount.

b)

No; his conclusion is not supported by evidence from his experiment because the increase is too low to be significant and the results were not consistent.

c)

No; because his results were consistent and showed a low growth.

d)

Yes; any increase is significant enough to be proof and the results match his hypothesis.

33.

Which element could be lustrous and brittle?

(a)

34.

Which element has a full valence shell?

(a)

35.

Which element has 3 valence electrons?

(a)

36.

Larry wants to test different types of fertilizer on tomato plants. He wants to see if one works better than the rest. He has 4 plants. The first one gets no fertilizer, the second one gets fertilizer A, the third Fertilizer B, and the fourth Fertilizer C. They each get the same amount of sunlight, same amount of soil, same type of soil, same amount of water, and are grown in the same air temperature in the same greenhouse. Larry is counting the total weight of tomatoes produced by each plant to determine how well the fertilizers worked. What is the dependent variable?

a)

the type of fertilizer

b)

the plant with no fertilizer

c)

the weight of tomatoes produced

d)

same amount of soil

37.

What is the charge on ions from elements in group 1 (first column)

(a)

38.

Write the formula for calcium (Ca²⁺) chloride (Cl^-)

a)

CaCl

b)

ClCa

c)

CaCl₂

d)

ClCa₂

39.

Write the formula for sodium iodide

a)

INa

b)

NaI

c)

NaI₂

d)

Na₁I₁

40.

Write the formula for magnesium oxide

a)

MgO

b)

MnO

c)

Mg₂O₂

d)

Mg₂O

41.

If carbon gained 4 electrons what would its charge be?

(type your answer as a number with a minus for negative - and a plus sign for positive +)

(a)

42.

If carbon lost 4 electrons what would its charge be?

(type your answer as a number with a minus for negative - and a plus sign for positive +)

(a)

43.

If an atom has 7 protons and 7 electrons what charge will it have?

(a)

44.

Which of the following is ionic?

a)

NO₂

b)

MgO

c)

CO

d)

CH₄

45.

How many oxygen atoms are in 6H₂O ?

(a)

46.

What is the chemical formula for hepta-carbon penta-hydrogen tetra-oxide ?

a)

C₇H₅O₄

b)

C₆H₁₀O₆

c)

C₆H₉O₆

d)

C₆H₁₀O₉

47.

A Carbon ion in a compound has a -4 charge. How many total electrons does the Carbon ion have?

(a)

48.

What formula represents hexacarbon monoxide?

a)

C₆O

b)

6CO₂

c)

C₂O

d)

C₂O₂

49.

Explain how can you determine how many more cases were there at the beginning of April compared to today?

Optional: Provide value.

a)

Look at the highest number of cases reported and divide by 2.

b)

Look at the first and last number of cases reported and divide by 2

c)

Subtract the last number of cases reported from the number of cases reported on April 1st.

d)

Subtract the lowest from the number of cases reported from the number reported on April 1st.

50.

Which has the greater Electronegativity:

N or C?

(a)

51.

Name the following ionic compound: MgSO₄

(a)

52.

What is the charge on the hydroxide ion?

(a)

53.

When naming ionic compounds with transition metals you need to include roman numerals to show the _____ of the metal..

a)

atomic number

b)

mass number

c)

charge

d)

ionization energy

54.

How many atoms total are in AlPO₄?

(a)

55.

Which of these is NOT a polyatomic ion?

a)

OH^- in Fe(OH)₃

b)

NO₂^- in KNO₂

c)

HSO₄^- in Sn(HSO₄)₄

d)

NH₄⁺ in NaNH₄

e)

Cl^- in MgCl₂

56.

Iron sulfate, Fe₂(SO₄)_3,is a yellow compound that has several commercial uses. How many sulfur atoms are represented in the formula Fe₂(SO₄)₃?

a)

12

b)

1

c)

2

d)

3

57.

In the compound CoSO₄, what is the charge on cobalt?

(a)

58.

What is the charge number for Co in Co₂O₃?

(a)

59.

What is the name of the compound NiCO₃?

(a)

60.

Name Fe(NO₃)₃

(a)

61.

The correct name for Cu(CN)₂ is (a) .

62.

Pb₃(PO4)₂

(a)

63.

Cd(OH)₂

(a)

64.

Convert this number to standard notation: 7.1 x 10⁴

(a)

65.

Convert this number to standard notation: 1.4 x 10^-2

(a)

66.

Why were both dishes covered?

A student noticed that when a dog is cut, the dog periodically licks its wounds. Usually, after a few days, the wound begins to heal without ever showing signs of infection.

The following steps outline the student’s line of reasoning

A. I wonder why the dog's wound doesn’t become infected?

B. The dog’s saliva must prevent the growth of infection-causing bacteria.

C. I’ll obtain a bacterial culture and grow the same kind of bacteria in two identical culture dishes. Once the bacteria start growing, I’ll add dog saliva to only one of the dishes and leave the other alone. I’ll cover both dishes. Then I’ll observe what happens each day for a week.

D. Even after adding the dog saliva to one of the dishes, the bacteria continued to grow in both dishes over the course of the week. However, the bacteria in the treated dish grew more slowly than the bacteria in the untreated dish.

E. I think I'll try something else. I’ll start with two identical culture dishes, as before, and use the same kind of bacteria in each dish, but this time I’ll create one dish with dog saliva before I add the bacteria. I’ll observe what happens each day for a week.

a)

To avoid the spread of the infection

b)

To avoid contamination (other bateria getting on the dishes)

c)

To compare the growth

d)

All of the answers are correct

67.

What is the dependent variable (response you are looking for) in this experient?

A student noticed that when a dog is cut, the dog periodically licks its wounds. Usually, after a few days, the wound begins to heal without ever showing signs of infection.

The following steps outline the student’s line of reasoning

A. I wonder why the dog's wound doesn’t become infected?

B. The dog’s saliva must prevent the growth of infection-causing bacteria.

C. I’ll obtain a bacterial culture and grow the same kind of bacteria in two identical culture dishes. Once the bacteria start growing, I’ll add dog saliva to only one of the dishes and leave the other alone. I’ll cover both dishes. Then I’ll observe what happens each day for a week.

D. Even after adding the dog saliva to one of the dishes, the bacteria continued to grow in both dishes over the course of the week. However, the bacteria in the treated dish grew more slowly than the bacteria in the untreated dish.

E. I think I'll try something else. I’ll start with two identical culture dishes, as before, and use the same kind of bacteria in each dish, but this time I’ll create one dish with dog saliva before I add the bacteria. I’ll observe what happens each day for a week.

a)

Dog saliva

b)

Bacterial growth

c)

Culture Dish

d)

Dog's wond

68.

According to the conclusion, of the following experiment, the hypothesis can be described as being?

A student noticed that when a dog is cut, the dog periodically licks its wounds. Usually, after a few days, the wound begins to heal without ever showing signs of infection.

The following steps outline the student’s line of reasoning

A. I wonder why the dog's wound doesn’t become infected?

B. The dog’s saliva must prevent the growth of infection-causing bacteria.

C. I’ll obtain a bacterial culture and grow the same kind of bacteria in two identical culture dishes. Once the bacteria start growing, I’ll add dog saliva to only one of the dishes and leave the other alone. I’ll cover both dishes. Then I’ll observe what happens each day for a week.

D. Even after adding the dog saliva to one of the dishes, the bacteria continued to grow in both dishes over the course of the week. However, the bacteria in the treated dish grew more slowly than the bacteria in the untreated dish.

E. I think I'll try something else. I’ll start with two identical culture dishes, as before, and use the same kind of bacteria in each dish, but this time I’ll create one dish with dog saliva before I add the bacteria. I’ll observe what happens each day for a week.

a)

Valid (supported)

b)

Invalid (unspuported)

c)

Pending

d)

Descriptive

69.

Alex noticed that a metal door that sticks on hot days does not stick when it cools off at night. This is because the metal contracts as it cools. The reason for this is that, as the metal cools, the atoms

a)

become smaller and take up less space.

b)

slow down and move closer together.

c)

merge together to form fewer atoms.

d)

speed up and move farther apart.

70.

Between which two points is the gas heating up?

a)

A ----> B

b)

B <---- C

c)

C ----> D

d)

D ----> E

e)

E ----> F

71.

Between which two points is the gas condensing?

a)

A <---- B

b)

B <---- C

c)

C <---- D

d)

D <---- E

e)

E <---- F

72.

How many energy levels does an atom of Chlorine have?

(a)

73.

A substance combined physically, but never chemically is a(an)...

a)

element

b)

molecule

c)

compound

d)

mixture

74.

Jane Goodall recorded 40 chimps living in a community, this is ____ data.

a)

quantitative

b)

qualitative

c)

observation

d)

field study

75.

What is the precise reading (in milliliters) of the liquid volume?

(a)

76.

How many spaces and which way would you move the decimal to convert this number to scientific notation?

0.000000034

a)

7 to the right, because there are 7 zeroes

b)

8 to the right, because there must be one number to the left of the decimal point that is more than 0 but less than 10

c)

7 to the left, because you have to get rid of the zeroes

d)

8 to the left, because there are 8 numbers to make it 3.4

77.

when particles settle it means that they...

a)

fall to the bottom of the container

b)

can be physically separated

c)

will physically separate themselves

d)

float in a solution

e)

chemically react

78.

Based on the following, what is the hypothesis or claim?

You are a doctor working at Kaiser. You want to test a new drug for cancer patients who are being treated in your hospital. You have a good feeling that this drug will work. You have 100 patients on which to test your drug.

a)

The new drug will help to reduce cancer in cancer patients

b)

The new drug will not help to reduce cancer in cancer patients

c)

The new drug will give cancer to cancer patients

d)

The new cancer patients will not benifit from the new drug.

79.

What is the name of N₂O₃

(a)

80.

What is the chemical formula for Tetrasulfur pentoxide?

a)

SO

b)

S₄O

c)

S₄O₅

d)

S₅O₄

81.

What is the chemical formula for Nitrogen triiodide?

a)

NI

b)

N₃I

c)

NI₃

d)

None of these

82.

What is the chemical formula for Tetraphosphorous Pentachloride ?

a)

₄P₅Cl

b)

PCl

c)

P₄Cl₅

d)

none of the above

83.

What is the name of S₂I₄ ?

a)

Sulfur iodide

b)

Disulfur iodide

c)

Sulfur tetraiodide

d)

none of the above

84.

phosphorus trichloride

a)

KCl₃

b)

PCl₃

c)

K₃Cl

d)

P₃Cl

85.

How many more ice cream shops are there than frozen yogurt shops?

a)

There are 15 more ice cream shops than frozen yogurt shops.

b)

There are 20 more ice cream shops than frozen yogurt shops.

c)

There are 30 more ice cream shops than frozen yogurt shops.

d)

There are 55 more ice cream shops than frozen yogurt shops.

86.

The third– and fourth–grade classes are going on a field trip. The graph shows how many parents and how many students have signed up to come so far. Use the graph to answer the question.
How many more students are signed up than parents?

a)

25 students

b)

50 students

c)

65 students

d)

80 students

87.

Ivana is studying insect life cycles. She placed a male and a female gnat inside a terrarium. The female gnat laid eggs. Ivana observed and recorded all of the stages she saw the eggs go through. Her results are shown in the table below.

Stage Time in Stage

egg 24 hours

larva 7 days

pupa 6 days

adult 2 weeks

Which of the following is a valid conclusion that Ivana can draw from her data?

a)

A gnat generally does not live for more than 1 week.

b)

A gnat life cycle has more than five stages.

c)

A gnat is a crustacean, not an insect.

d)

A gnat completes its life cycle in about 1 month.

Finals Sp 2021

Total questions: 87

Worksheet time: 2hrs 48mins

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