11. Which of the following statements is correct about matter? (8.P.8.5)

Elements combine to form compounds.

Compounds combine to form elements.

Compounds combine to form atoms.

Elements combine to form atoms.

15. Which of the following is the definition of a solution? (8.P.8.9)

A mixture containing two or more substances that has the same properties throughout.

A single kind of matter that has a specific makeup.

A compound containing two or more substances that are chemically combined.

A substance that cannot be broken down into any other substances.

16. Which of the following statements describes the difference between mixtures and pure substances? (8.P.8.9)

Mixtures can be physically separated but pure substances cannot be physically separated.

Pure substances can be physically separated but mixtures cannot be physically separated.

Mixtures are made of a single kind of matter but a pure substance is two or more substances that are chemically bonded.

Pure substances are not created through a chemical reaction and mixtures are the result of a chemical reaction.

17. Which diagram below represents a pure substance? Choose the best answer and reasoning. (8.P.8.9)

Diagram A is a pure substance because it is a compound and cannot be separated by physical means.

Diagram A is a pure substance because it is more evenly spread out.

Diagram B is a pure substance because it is more evenly spread out.

Diagram B is a pure substance because it is a compound and cannot be separated by physical means.

19. Jane performed an experiment in which one substance (X) underwent a chemical change to form two new substances (Y and Z). According to the Law of Conservation of Mass, which statement is correct about the chemical change? (8.P.9.1)

The mass of Y and Z together is the same as the mass of X.

The mass of X increased to create the mass of Y and Z.

The mass of X is more than the mass of Y and Z together.

The mass of Y and Z together is more than the mass of X.

20. In which of the following situations does the Law of Conservation of Mass apply? (8.P.9.1)

in both chemical and physical changes

in neither chemical or physical changes

21. Which one of the following is NOT an example of a chemical change? (8.P.9.2)

sugar dissolving in a glass of water

22. When a candle is lit, the wick burns, the wax melts, the candle changes shape, and the air around the candle heats up. Which of the following is an example of a chemical change? (8.P.9.2)

the air around the candle is heating up

23. Tina and Jenni put some ice cubes in a glass of water, and the ice cubes melted. What is the best evidence they can use to show that the melting of the ice is a purely physical change and NOT a chemical change? (8.P.9.2)

Even though the ice and the liquid water look different, they can be shown to be made of the same molecules.

When liquid water is put into the freezer and cooled long enough, it will change into a solid form.

She did not need to add any extra heat in order to get the ice to melt in the glass of water.

Although ice is more difficult to see through than liquid water, it does not change color when it melts.

24. Which of the following would definitely increase the rate of a reaction? (8.P.9.3)

decrease the size of the container

increase the size of the container

25. Jamie has 3 glow sticks. She puts one in boiling water, another in ice water and another in room temperature water. Which of the following situations is correct? (8.P.9.3)

The glow stick placed in the boiling water will be brightest but will last less time than the other glow sticks.

The glow stick placed in the ice water will be the brightest but will last less time than the other glow sticks.

The glow stick placed in the room temperature water will be the brightest and will last more time than the other glow sticks.

All three glow sticks will have the same brightness for the same amount of time.

26. Increasing the temperature of a chemical reaction increases the reaction rate. Which of the following statements explain why? (8.P.9.3)

Faster moving particles come in contact more often, which gives more chances for a reaction to happen.

Faster moving particles come in contact less often, which gives more chances for a reaction to happen.

Slower moving particles come in contact more often, which gives more chances for a reaction to happen.

Slower moving particles come in contact less often, which gives more chances for a reaction to happen.

27. Which of the following examples demonstrates replication? (8.N.1.2)

Sarah is following another student’s written procedures for an experiment that was already performed.

Joseph conducts his own experiment 25 times.

Juanita conducts her experiment 1 time.

Matt writes the procedures of his experiment carefully and carries out his experiment.

28. Which of the following examples shows an experiment that has been designed and conducted using repeated trials and replication? (8.N.1.2)

Rashawn is conducting an experiment using tennis balls. He completes 30 trials and has 2 of his friends complete the experiment by following his procedures.

Addison is conducting an experiment using water. She completes 30 trials, then after the experiment, she has a friend read over the procedure.

Amanda is conducting an experiment using aluminum foil. She completes her experiment 1 time and makes adjustments to her procedures. She then completes 20 trials of her experiment.

Julian is conducting an experiment using rubber bands. He completes 10 trials then begins work on a different experiment.

29. Which of the following shows repeated trials in an experiment? (8.N.1.2)

Katelyn conducts an experiment that requires her to throw an object at a target 20 times.

Samuel writes his own procedures and then has a friend complete 20 trials.

Leslie writes her own procedures for her group to follow.

Joshua’s classmate asked him to conduct her experiment ten times to make sure it was valid.

30. Kelsey plays soccer and gets grass stains on her shorts. She uses several types of laundry detergent to try to remove the stains, but none of them work. She makes the hypothesis that laundry detergents are not able to remove grass stains from clothing. Which best describes the evidence that “fails to support” the hypothesis? (8.N.1.3)

The stain is removed when a different type of laundry detergent is used.

The stain is removed when a stain remover is used before it is washed using laundry detergent.

The stain does not go away after being repeatedly laundered in water with no laundry detergent.

The stain fades when the clothing is hung outdoors and exposed to sunlight.

31. Marsha observes that ants are attracted to a spilled juice drink. She makes a hypothesis that ants are attracted to sweet liquids. She places small samples of five different sweet liquids on the ground along with five equal-sized samples of water and observes the ants. She notices ants at the sites where the sweet liquids were placed, but not at the sites where the water was placed. Which of the following provides the best conclusion based on these observations? (8.N.1.3)

Marsha’s observations prove that her hypothesis is correct because the ants are found only at the sites of the sweet liquids.

Marsha’s observations fail to support her hypothesis because she did not use enough samples.

Marsha’s observations fail to support her hypothesis because she used five different types of sweet liquids but only one type of “unsweetened” liquid.

Marsha’s observations support her hypothesis because ants are found at all of the sites with the sweet liquids but at none of the sites containing water.

32. Jim is studying bacteria in science class. He states the following hypothesis: Bacterial populations grow more rapidly in warm temperatures. He decides to test his hypothesis by calculating how much time is needed for a bacterial population to double in size when placed in different temperatures. He organizes the data he gathers in the table shown. Which of the following statements best summarizes the relationship between Jim’s data and his hypothesis? (8.N.1.3)

The data supports the hypothesis because the amount of time needed for the bacterial population to double in size decreased as temperature increased.

The data do not support the hypothesis because the amount of time needed for the bacterial population to double in size increased as temperature increased.

The data supports the hypothesis because the amount of time needed for the bacterial population to double in time increased only at certain temperatures.

The data proves that Jim’s hypothesis is right.

When the temperature of matter increases the particles...

speed up and move farther apart

slow down and move closer together

slow down and move farther apart

Holguin Q2 Midterm Practice Assessment

Authored by Richard Thomas

Science

8th Grade

NGSS covered

Used 8+ times

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40 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1. Which is the correct order of labels for the beakers below? (8.P.8.1)

1 = liquid, 2 = gas, 3 = solid

1 = gas, 2 = liquid, 3 = solid

1 = solid, 2 = liquid, 3 = gas

1 = liquid, 2 = solid, 3 = gas

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

2. How do the particles in an object at 40°C compare to the particles of an object at 0ºC? (8.P.8.1)

The particles at 40°C are moving faster than the particles at 0°C.

The particles at 0°C are moving faster than the particles at 40°C.

The particles at 40°C are moving at the same speed as the particles at 0°C.

Neither the particles at 40°C or the particles at 0°C are moving.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

3. Which of the following statements is correct when you think about the particles in a liquid? (8.P.8.1)

They are closer together and lower in energy than those in a solid.

They are closer together and lower in energy than those in a gas.

They are farther apart and higher in energy than those in a gas.

They are farther apart and lower in energy than those in a solid.

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

4. Which of the following statements is true about the diagram? (8.P.8.7)

This is an atom with 2 protons, 1 electron and 3 neutrons

This is an atom with 2 electrons and 4 protons and 0 neutrons

This is an atom with 6 electrons, 0 protons and 0 neutrons

This is an atom with 2 protons, 2 neutrons and 2 electrons.

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

5. Which subatomic particle is the arrow pointing to in the figure below? (8.P.8.7)

proton

neutron

electron

atom

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

6. John discovered that sodium (Na) is found in Group 1 on the Periodic Table. Where should John look for another element that has similar properties? (8.P.8.6)

in the same period

in the same group

on the opposite side of the periodic table

for names that begin with the letter "N"

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

7. What can you predict from an element’s location in the Periodic Table? (8.P.8.6)

its chemical symbol

its chemical name

its physical properties

when it was discovered

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Holguin Q2 Midterm Practice Assessment

1. Which is the correct order of labels for the beakers below? (8.P.8.1)

2. How do the particles in an object at 40°C compare to the particles of an object at 0ºC? (8.P.8.1)

3. Which of the following statements is correct when you think about the particles in a liquid? (8.P.8.1)

4. Which of the following statements is true about the diagram? (8.P.8.7)

5. Which subatomic particle is the arrow pointing to in the figure below? (8.P.8.7)

6. John discovered that sodium (Na) is found in Group 1 on the Periodic Table. Where should John look for another element that has similar properties? (8.P.8.6)

7. What can you predict from an element’s location in the Periodic Table? (8.P.8.6)

8. Which is the smallest unit of matter? (8.P.8.5)

9. Using the Periodic Table, scientists can predict the properties of elements. Using the periodic table below or a copy of the one you have been using in class, which of the following pairs of elements have properties that are the least similar? (8.P.8.6)

10. Which of the following is a compound? (8.P.8.5)

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Holguin Q2 Midterm Practice Assessment

1. Which is the correct order of labels for the beakers below? (8.P.8.1)

2. How do the particles in an object at 40°C compare to the particles of an object at 0ºC? (8.P.8.1)

3. Which of the following statements is correct when you think about the particles in a liquid? (8.P.8.1)

4. Which of the following statements is true about the diagram? (8.P.8.7)

5. Which subatomic particle is the arrow pointing to in the figure ​below?​ (8.P.8.7)

6. John discovered that sodium (Na) is found in Group 1 on the Periodic Table. Where should John look for another element that has similar properties? (8.P.8.6)

7. What can you predict from an element’s location in the Periodic Table? (8.P.8.6)

8. Which is the smallest unit of matter? (8.P.8.5)

9. Using the Periodic Table, scientists can predict the properties of elements. Using the periodic table below or a copy of the one you have been using in class, which of the following pairs of elements have properties that are the least similar? (8.P.8.6)

10. Which of the following is a compound? (8.P.8.5)

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5. Which subatomic particle is the arrow pointing to in the figure below? (8.P.8.7)