Free Printable SLT TEST 3 through acids

1.

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?

2.

A scientist who wants to study the effects of a new fertilizer on plants would probably=

a)

give each experimental group the same amount of the fertilizer.

b)

not worry about measuring the amount of fertilizer used.

c)

include a control group that received no fertilizer.

d)

use different numbers of plants in each group.

3.

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

a)

65

b)

66

c)

67

d)

68

4.

You and your friends want to determine if fertilizer helps a Barrel Cactus grow a flower (you have a cactus at home, and you really want it to grow a flower). You suspect that fertilizer will help. You buy two cacti. You plant Cactus A in normal soil with no fertilizer and plant the other in a pot with fertilizer. After summer comes and goes, no flower grows. In fact, the cactus with fertilizer died. What is the question you and your friends are investigating?

a)

If the fertilizer caused the cactus to flower.

b)

If the fertilizer caused the cactus to die.

c)

If the fertilizer made the cactus die, but no generalizable conclusions can be drawn.

d)

If the fertilizer will help the cactus produce a flower.

5.

Darlene places a bolt in the graduated cylinder to find its volume. Its starting volume is 45.5mL. After she puts the bolt in the graduated cylinder the water level rose to 65.5mL. What is the volume of the bolt?

a)

10 cubic centimeters

b)

19.5 cubic centimeters

c)

20.5 cubic centimeters

d)

21 cubic centimeters

e)

20

6.

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 3.65 grams. How much more sulfur powder does Carla need?

a)

A) 4.5 grams

b)

A) 5.1 grams

c)

A) 5.0 grams

d)

A) 3.45 grams

7.

Kelsey is measuring a sample of iodine crystals for an experiment. What is the mass of the iodine and weighing paper?

a)

A) 162.1 grams

b)

A) 162 grams

c)

A) 163 grams

d)

A) 164 grams

8.

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 3 and find the answer below.

a)

A) 10.49 g/cm³

b)

A) 10.51 g/cm³

c)

A) 10.55 g/cm

d)

A) 10.49 g/cm

9.

Mr. Lee wants to confirm the metal used in a ring with a mass of 26.055 g. The volume of the ring is 1.35 cubic centimeters (cm³). What is the metal composition of the ring?

a)

A) Sterling silver

b)

18-ct white gold

c)

Pure gold

d)

=Platinum

10.

A student measured the velocities reached by an electric cart over time and recorded the data in the table shown. The student graphs the data, putting time in the horizontal (x) axis and the velocities reached on the vertical (y) axis. Which aspect of the graph reflects the acceleration of the cart?

a)

y-intercept

b)

y-axis scale

c)

slope

d)

midpoint

11.

a)

Graph A

b)

Graph B

c)

Graph C

d)

Graph D

12.

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

13.

a)

Graph A

b)

Graph B

c)

Graph C

d)

Graph D

14.

What was the net loss in glacier ice thickness between the years 1970 and 2000?

a)

8m

b)

6m

c)

7m

d)

10m

15.

The graph shows energy production in the United States in 1967 and 2007 for several sources of energy. Which conclusion is supported by the graph?

a)

A) In 1967 more energy was produced in oil than in 2007

b)

A) More energy was produced in 2007 than in 1967 in every category.

c)

A) In 2007, more energy was produced from renewable energy sources than from fossil fuels.

d)

A) People in the United States were more concerned about conserving energy in 1967 than they were in 2007.

16.

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. Seeming not to fit a pattern

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

17.

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

18.

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 slowest?

a)

1

b)

2

c)

3

d)

4

19.

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 support the Hypothesis that increased surface area and heat will dissolve solutes faster?

a)

1

b)

2

c)

3

d)

4

20.

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

b)

Dissolve mixture in a universal solvent and filter.

c)

Pass a magnet over the mixture.

d)

Sift the mixture through fine wire mesh.

21.

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

a)

A) Size of particles

b)

A) polarity of the molecules

c)

A) Size of pores in the filter

d)

A) Temperature of the water

22.

The graph shows the temperature changes in a sample of water that is heated steadily from -40°C. Which process is happening in section 2 of the graph?

a)

A) Ice is getting warmer.

b)

A) Ice is melting.

c)

A) Ice is in the solid phase.

d)

A) Ice is changing to vapor and then to a liquid.

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.

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

a)

A) A flame indicates a change of energy.

b)

A) A flame indicates a phase change.

c)

A) A flame indicates new physical energy is forming.

d)

A) A flame indicates a change in chemical energy.

25.

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 does not

a)

cause a permanent change of energy .

b)

change how atoms are bonded to one another

c)

change the mass in the wick.

d)

involve the destruction of molecules.

26.

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

I. There is a strong smell of smoke.

II. The fire gives off heat.

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)

A) observations I and V only

b)

A) observations II , III, and V only

c)

A) observations I, III, and V only

d)

A) observations I, IV, and V only

27.

Janelle is studying a sample of peroxide. She knows the chemical name for peroxide is Dihydrogen dioxide. What is the chemical formula for peroxide?

a)

H₂O₂

b)

2HO₂

c)

HO

d)

2HO

28.

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

a)

C₇H₅O₄

b)

C₆H₁₀O₆

c)

C₆H₉O₆

d)

C₆H₁₀O₉

29.

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

a)

p⁺ > n⁰

b)

n⁰ < e^-

c)

p⁺ > e^-

d)

e^- > n⁰

30.

Which table correctly shows 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

31.

Holly is examining an isotope of manganese. She determines that each atom has 36 protons, 36 electrons, and 52 neutrons. What is the mass number for this manganese isotope?

a)

72 amu

b)

88 amu

c)

52 amu

d)

104 amu

32.

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

a)

2

b)

7

c)

8

d)

10

33.

How does an atom get a -2 charge and become an ion?

a)

They gain 2 protons.

b)

They gain 2 electrons.

c)

They lose 2 protons.

d)

They lose 2 electrons.

34.

Transition metals are located in the _______ of the periodic table while the Nobal gasses are on the ___________?

a)

left, right

b)

right, left

c)

middle, right

d)

right, middle

35.

The diagram shows an outline of the periodic table with four elements labeled. Which element is a non-metal?

a)

1

b)

2

c)

3

d)

4

36.

A Bohr model of an unknown element shows 7p⁺. What element is being diagrammed in the model?

a)

A) Oxygen

b)

A) Lithium

c)

A) Nitrogen

d)

A) Carbon

37.

What formula represents hexacarbon monoxide?

a)

C₆O

b)

6CO₂

c)

C₂O

d)

C₂O₂

38.

Which formula represents the ionic compound Sodium Chloride?

a)

NaCl

b)

NaCl2

c)

NaCL

d)

NaCl2

39.

Jeff used a piece of indicator paper to test an unknown liquid. The result of his test is shown below the pH scale. Based on the pH scale, what is the Best description of the liquid?(About pH of 8)

a)

A) Very acidic

b)

A) Weakly acidic

c)

A) Very basic

d)

A) Weakly basic

40.

The reaction equation showing the formation of iron (III) oxide is not balanced. _?_N₃ +_?_H₃ --> _?_NH₃

Which set of coefficients, when inserted in the blank spaces in order, will balance the equation?

a)

1, 3, 3

b)

1, 2, 2

c)

2, 1, 1

d)

2, 2, 1

41.

Use the reaction equation to answer the question.
6CO₂ + 6H₂O-->C₆ H₁₂ O₆ + 6O₂The reaction equation shows a common chemical reaction. Where does this reaction commonly occur?

a)

in the lungs of an animal

b)

in the mouth as humans exhale carbon dioxide

c)

in the leaves of plants

d)

in animal digestive systems

42.

Which statement correctly describes where humans typically get their energy?

a)

Chemical energy is energy stored in the bonds between atoms of the food particles.

b)

Chemical energy is the kinetic energy of moving and vibrating molecules of our food.

c)

Chemical energy is the result of mass converted to energy in the nucleus of an atom of our food.

d)

Chemical energy is energy stored as the result of stressing or stretching a substances in our food.

43.

You are taking the temperature for data for your science class, the temperature is 96 degrees. What month do you predict it is?

a)

September

b)

July

c)

May

d)

December

44.

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

a)

The more books students read, the lower their English grade.

b)

The more books students read, the higher their English grade.

c)

The fewer books students read, the higher their English grade.

d)

No relationship exists between the number of books students read and their English grades.

45.

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 growth rate. The other group he feeds the same food without chemical A added. His research shows that chemical A increases growth rate by 30%. He does the experiment 4 times and comes up with the same result each time.
Dr. Peterson concludes that chemical A does increase the growth rate of mice. Is Dr. Peterson's conclusion supported by scientific knowledge?

a)

Yes; any study that involves a percentage is based on scientific knowledge.

b)

Yes; his conclusion is supported by evidence from his experiment.

c)

No; science cannot be used to research small animals such as mice.

d)

No; scientific knowledge never comes from research or experiments.

46.

What part of the scientific method is illustrated in Step B?

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)

Conclusion

b)

Data

c)

Hypothesis(claim)

d)

Problem

47.

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

48.

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

49.

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

50.

What is the correct name for the compound PH₃?

a)

Monophosphorus trihydride

b)

Phosphorus hydride

c)

Trihydrogen monophosphide

d)

Phosphorus trihydride

51.

A + BC = B + AC

a)

Single Replacement

b)

Combustion

c)

Double Replacement

d)

Synthesis

52.

What is the left part of a chemical equation called?
H_{2 +}O → H₂O

a)

Reactants

b)

Products

c)

Yields

d)

Chemical Equation

53.

NO₂ →N₂+ O₂

a)

Synthesis (combination)

b)

Decomposition

c)

Single replacement

d)

Combustion

54.

____ NaF + ____ Br₂ ---> ____ NaBr + ____ F₂

a)

3,1,2,1

b)

1,2,3,4

c)

2,1,2,1

d)

1,2,1,2

55.

A substance made from different kinds of atoms chemically combined is a(an)...

a)

element

b)

molecule

c)

compound

d)

mixture

56.

The graph below shows the number of sunny days and rainy days in a city during four months.

Based on the graph,how many more sunny days than rainy days did this city have during the months of April, May, and June?

a)

21

b)

56

c)

26

d)

20

57.

The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?

a)

3

b)

9

c)

7

d)

5

58.

Which of the following statements is correct?

a)

Blue litmus paper turns red when placed in a base.

b)

Red litmus paper turns blue when placed in a base.

c)

Blue litmus paper stays blue when placed in an acid.

d)

Red litmus paper stays red when placed in a base.

59.

Litmus paper can be used to determine the _______ of a substance.

a)

relative volume

b)

temperature

c)

relative pH

d)

chemical formula

60.

Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece of blue litmus paper into the substance, and the litmus paper stays blue.
The substance in the beaker

a)

is a base.

b)

has a neutral pH.

c)

is an acid.

d)

does not have a pH.

61.

If an acid is combined with a base of equal strength, the result will most likely be

a)

a neutral solution.

b)

a stronger acid.

c)

impossible to tell without testing the pH.

d)

a stronger base

62.

The esophagus is the tube that connects the mouth to the stomach. Heartburn occurs when some of the stomach juices flow backwards up the esophagus. To help relieve heartburn, a person should take medicine that is

a)

neutral

b)

basic

c)

acidic or basic.

d)

acidic

63.

Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.

a)

Acids; pH less than 7

b)

Acids; pH greater than 7

c)

Bases; pH greater than 7

d)

Bases; pH less than 7

64.

Which statement correctly describes where humans typically get their energy?

a)

Chemical energy is energy stored in the bonds between atoms of the food particles.

b)

Chemical energy is the kinetic energy of moving and vibrating molecules of our food.

c)

Chemical energy is the result of mass converted to energy in the nucleus of an atom of our food.

d)

Chemical energy is energy stored as the result of stressing or stretching a substances in our food.

65.

Solution where more solute can still be dissolved at the given temperature.

a)

Saturated

b)

Unsaturated

c)

Supersaturated

d)

Homogeneous solution

66.

The maximum amount of a solute that can be dissolved in a given amount of solvent at a given temperature.

a)

solubility

b)

concentrated

c)

diluted

d)

surface area

67.

How does a solution become supersaturated?

a)

dissolve lots of solute in it.

b)

dissolve a little solute in it.

c)

dissolve more solute than you should be able to.

d)

dissolve a super amount of solvent in it.

68.

You make a Kool Aid drink using Kool Aid powder, sugar, & water & you notice your drink still has to much powder sitting at the bottom. What will happen if you add more water to the drink?

a)

decrease the solubility of your drink

b)

decrease the solubility rate of your drink

c)

increase the solubility rate of your drink

d)

increase the solubility of your drink

69.

Which of the following is not a solute?

a)

coffee grounds

b)

Kool Aid powder

c)

food die in water

d)

paint thinner

70.

calcium oxide

a)

Ca₂O₂

b)

Ca₂O

c)

CaO

d)

CaO₂

71.

Lithium fluoride

a)

LiF

b)

LiF₂

c)

Li₂F

d)

Li₂F₃

72.

Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks
Which group is the control group?

a)

Group A

b)

Group B

73.

Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks
The juice is the ____ variable

a)

Independent

b)

Dependent

c)

Control

d)

Constant

74.

Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks
The stacks of paper is the _____ variable

a)

Independent

b)

Dependent

c)

Control

d)

Constant

75.

Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks
Which group is the experimental group?

a)

Group A

b)

Group B

SLT TEST 3 through acids

Total questions: 75

Worksheet time: 1hrs 4mins

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