Topic: 8.5 Matter and Energy (1)
Quiz by Texas Education Agency
Grade 8
Science (2010)
Texas Essential Knowledge and Skills (TEKS)
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Measures 6 skills fromGrade 8Science (2010)Texas Essential Knowledge and Skills (TEKS)
Measures 6 skills from
Grade 8
Science (2010)
Texas Essential Knowledge and Skills (TEKS)
8.5.C: Matter and Energy
8.5.B: Matter and Energy
8.5.A: Matter and Energy
8.5.E: Matter and Energy
8.5.D: Matter and Energy
8.5.F: Matter and Energy
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25 questions
Show answers
- Q1A researcher wants to experiment with an element that reacts like phosphorus (P) but has a greater atomic mass. Which element should the researcher select for the experiment?Silicon (Si)Arsenic (As)Sulfur (S)Nitrogen (N)60s8.5.C: Matter and EnergyEditDelete
- Q2A model of an atom is shown below. An atom of which element is represented by this model?Sodium (Na)Neon (Ne)Carbon (C)Boron (B)60s8.5.B: Matter and EnergyEditDelete
- Q3Which of the following best describes an electron?It has a positive charge and much more mass than a neutron.It has a negative charge and about the same mass as a neutron.It has a negative charge and much less mass than a proton.It has no charge and about the same mass as a proton.60s8.5.A: Matter and EnergyEditDelete
- Q460s8.5.E: Matter and EnergyEditDelete
- Q5Which information could a student determine from only the chemical formula of a protein?The number of atoms of each element in the proteinThe physical arrangement of atoms in the structure of the proteinThe color of the proteinThe number of molecules in each sequence that makes up a protein60s8.5.D: Matter and EnergyEditDelete
- Q6A teacher asks a student to write the chemical equation for photosynthesis. The student’s response is shown below. The equation is not balanced correctly. Which of these is a balanced equation for photosynthesis?#texas/42f49aba-ff70-48a8-84e8-a30523320ff9/C.png#texas/42f49aba-ff70-48a8-84e8-a30523320ff9/D.png#texas/42f49aba-ff70-48a8-84e8-a30523320ff9/A.png#texas/42f49aba-ff70-48a8-84e8-a30523320ff9/B.png60s8.5.F: Matter and EnergyEditDelete
- Q7When trying to identify an unknown element, a scientist determines what other elements the unknown element reacts with chemically. Which property of the unknown element determines the other elements it reacts with?The total number of particles in the nucleus of the unknown elementThe number of protons in the nucleus of the unknown elementThe total number of neutrons in the unknown elementThe number of valence electrons in the unknown element60s8.5.B: Matter and EnergyEditDelete
- Q8The model of the periodic table below shows the locations of four elements. A student is asked to identify an element that is a pale-yellow brittle solid and does not conduct electricity. At which location in this periodic table would the element most likely be found?234160s8.5.C: Matter and EnergyEditDelete
- Q9An atom has 25 protons, 30 neutrons, and 25 electrons. What is the charge of the atom’s nucleus?30−2525−3060s8.5.A: Matter and EnergyEditDelete
- Q10Users enter free textType an Answer60s8.5.D: Matter and EnergyEditDelete
- Q11During an investigation, a student combined the two clear, colorless solutions shown below. The student observed that the temperature changed from 25°C to 23°C when the solutions were combined and that a white substance rapidly formed and settled to the bottom of the container. What most likely happened to produce these results?Some of the water froze into ice crystalsThe solutions reacted chemically.One of the original compounds came out of solutionRapid evaporation of water occurred, leaving a solid.60s8.5.E: Matter and EnergyEditDelete
- Q12Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?The shape of the coal changes.Oxygen is present.A new substance is produced.Coal is made up of more than one element.60s8.5.E: Matter and EnergyEditDelete
- Q13The atoms of a certain element each contain 11 protons and 1 valence electron. Which statement correctly identifies this element and describes its chemical reactivity?The element is sodium, and it is not very reactive.The element is sodium, and it is highly reactive.The element is fluorine, and it is not very reactive.The element is fluorine, and it is highly reactive60s8.5.B: Matter and EnergyEditDelete
- Q14An atom of a certain element has 36 protons, 36 electrons, and a mass number of 84. At room temperature this element is a very stable gas. How many neutrons are in this atom? Be sure to use the correct place value.Users enter free textType an Answer60s8.5.A: Matter and EnergyEditDelete
- Q1560s8.5.F: Matter and EnergyEditDelete
- Q16The periodic table is organized into groups and periods of elements. The characteristics of a certain group of elements are listed below. Which of these elements is in this group?AluminumStrontiumSiliconLithium60s8.5.C: Matter and EnergyEditDelete
- Q17Which of these formulas contain equal numbers of nitrogen atoms?Formulas I and IIIFormulas II and IIIFormulas I, II, and VFormulas I and IV60s8.5.D: Matter and EnergyEditDelete
- Q1860s8.5.D: Matter and EnergyEditDelete
- Q19A chemist is identifying the elements present in a sample of seawater. What characteristic of an element’s atoms always determines the element’s identity?The number of protonsThe number of valence electronsThe number of neutronsThe location of valence electrons60s8.5.B: Matter and EnergyEditDelete
- Q20In the early 1900s many scientists thought that an atom consisted of a positive substance with negative charges scattered throughout the substance. Then Ernest Rutherford completed an experiment that changed the concept of an atom. His discovery led to the understanding that an atom consists mostly of empty space with —electrons and protons orbiting a cloud of neutronsneutrons and protons orbiting a cloud of electronsprotons orbiting a dense nucleus made of electrons and neutronselectrons orbiting a dense nucleus made of protons and neutrons60s8.5.A: Matter and EnergyEditDelete
