STUDENT NAME______TEACHER______
(Chemistry) GRADE QUARTER TWO ASSESSMENT
Today you will be taking the CHEMISTRY QUARTER TWO assessment. This test is designed to test your skills and knowledge in science. It has questions taken from science classes, as well as about experiments. You should make sure to read each question carefully, including the information given at the beginning of each section. Examine the diagrams to help you understand the questions as well. Some questions may refer to diagrams or information from the previous page.
For the multiple choice sections, make sure to place your answers on your Scantron sheet.
Make sure the Scantron has your full name, neatly written.
For the open ended questions, make sure to read all the information, and write your answer clearly in the space provided
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The diagram of the periodic table on the next page may help you in answering questions:
1.(C1) What does the diagram below show about matter?
A) Matter is made up of elements
B) Matter takes up space
C) Matter is a solid
D) Matter has mass
2. .(D10) Atoms in a molecule are joined together by
A) chemical bonds
B) electricity
C) gravity
D) heat
3. (D11) Which is true about a chemical change, such as combustion?
A) Electrons have moved between atoms.
B) The new substance can be changed back easily.
C) The amount of protons and neutrons has been changed.
D) There has been a change in mass.
4. (D10)Which of the following is the same for both hydrogen (H) and potassium (K) ?
A) Number of protons
B) Number of filled energy levels
C) Number of outer valence electrons
D) Number of neutrons
5. (C3)The illustration below shows a label from a dietary supplement.
Why is this dietary supplement best characterized as a mixture instead of a pure substance?
A) The percent daily value is less than 100 percent.
B) Calcium citrate contains more than one element.
C) A tablet contains different chemical compounds.
D) Calcium citrate is composed of nonmetallic elements.
6. (D10) In order to change Magnesium (Mg) into a new element which needs to be changed?
A) Number of electrons
B) Number of protons
C) Number of neutrons
D) Number of electron levels
7. (D10)The figure below represents the periodic table and the location of four different elements on the table.
A certain element has a ground state electron configuration of 1s2 2s22p6 3s23p6. This means it has three levels filled, with 8 electrons in the outermost level. Which letter in the diagram above represents the position of this element on the periodic table?
A) YB) WC) XD) Y
8) (D11)Which of these is NOT an ionic compound?
A)Plastic B) Boric acid C)Table Salt D) Aluminum hydroxide
9) (D10) Which property makes elements such as Uranium and Plutonium useful for nuclear energy?:
A) They are very reactive in making chemical bonds.
B) They are commonly found in earth
C) They have unstable isotopes with different numbers of neutrons.
D) They have unstable ions with different numbers of electrons
10) (D11) Which group of elements would most likely combine together to make a compound?
A) Neon (Ne) a noble gas, and gold (Au), a metal
B) Lithium (Li), a metal, and Chromium (Cr), a metal
C) Calcium (Ca) a metal, and Sulfur (S), a nonmetal.
D) Gold (Au) a metal, and Nickel (Ni), a metal.
11) (DINQ8) The graph below represents data gathered during an experiment on reaction rates of mixing magnesium with a hydrochloric acid solution. Which of the following conclusions is best supported by data from this graph?
A) Reaction time is independent of temperature.
B) The reaction time is constant for magnesium and HCl.
C) A reaction only occurs when the temperature is above 100 °C.
D) The reaction time decreases as temperature increases.
12. (DINQ5) A class wants to do an experiment to determine how different metals, such as magnesium, aluminum, zinc. affect reaction rate in hydrochloric acid solution. They are using forty beakers, in four groups of ten. What is the best control group for their experiment?
A) Measuring the rate of reaction of a single beaker with just acid and water added.
B) Measuring the amount of metal reacted in a single beaker over an minute.
C) Measuring the rate of reaction of ten beakers with just acid and water added.
D) Measuring the rate of reaction of ten beakers of acid solution with all three metals added.
13. (DINQ3) Another class decides to do an experiment to test their hypothesis that the amount of light affects reaction rate. Which is true about their hypothesis?
A) It is a poor hypothesis because it is not a fact.
B) It is good hypothesis because it is testable.
C) It is a poor hypothesis because it is not accurate.
D) It is a good hypothesis because it is true.
STUDENT NAME______
ELEVENTH GRADE QUARTER TWO ASSESSMENT
Use the information on the next pages to answer the three open-ended experimentation questions. Answer the questions in the space provided. Make sure to write clearly and neatly, while answering the question fully. Remember to answer the question, then WRITE a good explanation. You can always add diagrams or charts if you think it will help explain your answer.
Students in a science class conducted experiments to study the effect of different metals on the rate of reaction. We carried out the following experiment:
We obtained 12 identical beaker and separated them into four groups, for the four groups in our class.. We placed 300 ml of water and 30 ml of hydrochloric acid into each beaker.
Then we added:
No metal to group 1
10 grams of zinc into group 2
10 grams of magnesium into group 3
10 grams of iron into group 4.
We each measured the amount of time it took till all the metal had reacted or the reaction had stopped.
Results are shown below:
GroupMetalsAverage Time to react
1 noneinfinity (didn’t do anything)
210 grams Zn 33.42 seconds
310 grams Mg0.5 minutes
410 grams Fe20 seconds
Use these results to answer the following questions:
STUDENT NAME______
ELEVENTH GRADE QUARTER TWO ASSESSMENT
61. (DINQ5) (3 pts) What is the problem this group is investigating? Make sure to identify the independent and dependent variables.
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STUDENT NAME______
ELEVENTH GRADE QUARTER TWO ASSESSMENT
62. (DIN9)(3 pts) What conclusions can be drawn from their experiment and results? How valid do you think these conclusions are, based on the group’s experiment and results? Explain your answer fully. ______
NAME______
ELEVENTH GRADE QUARTER TWO ASSESSMENT
63. (DINQ4)(3 pts) The class then decides to investigate whether adding different amounts of metal affects reaction rates.
Write a step-by-step procedure you could use to collect reliable data related to your question. Include enough detail so that someone else could conduct the same experiment and get similar results.
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