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Massachusetts Curriculum Frameworks for Science and Technology -- Strand 3: Physical Sciences (Chemistry and Physics)On This Page
Properties of Matter
3. Recognize that the measurement of volume and mass requires understanding of the sensitivity of measurement tools (e.g., rulers, graduated cylinders, balances) and knowledge and appropriate use of significant digits.
4. Explain and give examples of how mass is conserved in a closed system.
15. Explain the effect of heat on particle motion through a description of what happens to particles during a change in phase.
1. Properties of Matter
Broad Concept: Physical and chemical properties can be used to classify and describe matter.
1.2 Explain the difference between mixtures and pure substances. *
Broad Concept: An atom is a discrete unit. The atomic model can help us to understand the interaction of elements and compounds observed on a macroscopic scale.
2.5 Using Bohr's model of the atom interpret changes (emission/absorption) in electron energies in the hydrogen atom corresponding to emission transitions between quantum levels.
2.6 Describe the electromagnetic spectrum in terms of wavelength and energy; identify regions of the electromagnetic spectrum.
2.7 Write the electron configurations for elements in the first three rows of the periodic table.
2.8 Describe alpha, beta, and gamma particles; discuss the properties of alpha, beta, and gamma radiation; and write balanced nuclear reactions.
2.9 Compare nuclear fission and nuclear fusion and mass defect. *
2.10 Describe the process of radioactive decay as the spontaneous breakdown of certain unstable elements (radioactive) into new elements (radioactive or not) through the spontaneous emission by the nucleus of alpha or beta particles. Explain the difference between stable and unstable isotopes.
2.11 Explain the concept of half-life of a radioactive element, e.g., explain why the half-life of C14 has made carbon dating a powerful tool in determining the age of very old objects.
Broad Concept: Periodicity of physical and chemical properties relates to atomic structure and led to the development of the periodic table. The periodic table displays the elements in order of increasing atomic number.
3.4 Identify trends on the periodic table (ionization energy, electronegativity, electron affinity, and relative size of atoms and ions).
Broad Concept: Atoms form bonds by the interactions of their valence electrons.
4.7 Name and write the chemical formulas for simple ionic and molecular compounds, including those that contain common polyatomic ions.
Broad Concept: The conservation of atoms in chemical reactions leads to the ability to calculate the mass of products and reactants.
5.6 Calculate percent yield in a chemical reaction.
Broad Concept: The behavior of gases can be explained by the Kinetic Molecular Theory.
Broad Concept: Solids, liquids, and gases dissolve to form solutions.
7.2 Identify and explain the factors that affect the rate of dissolving, i.e., temperature, concentration, and mixing. *
7.3 Describe the dynamic equilibrium that occurs in saturated solutions.
7.4 Calculate concentration in terms of molarity, molality, and percent by mass.
7.5 Use a solubility curve to determine saturation values at different temperatures.
7.6 Calculate the freezing point depression and boiling point elevation of a solution.
7.7 Write net ionic equations for precipitation reactions in aqueous solutions.
Broad Concept: Acids and bases are important in numerous chemical processes that occur around us, from industrial processes to biological ones, from the laboratory to the environment.
8.3 Identify a buffer and explain how it works.
8.4 Explain how indicators are used in titrations and how they are selected.
8.5 Describe an acid-base titration. Identify when the equivalence point is reached and its significance.
8.6 Calculate the pH or pOH of aqueous solutions using the hydronium or hydroxide ion concentration.
Broad Concept: Chemical equilibrium is a dynamic process that is significant in many systems (biological, ecological and geological). Chemical reactions occur at different rates.
9.2 Predict the shift in equilibrium when the system is subjected to a stress (LeChatelier's principle).
9.3 Identify the factors that affect the rate of a chemical reaction (temperature, concentration) and the factors that can cause a shift in equilibrium (concentration, pressure, volume, temperature).
9.4 Explain rates of reaction in terms of collision frequency, energy of collisions, and orientation of colliding molecules.
9.5 Define the role of activation energy in a chemical reaction.
Broad Concept: The driving forces of chemical reactions are energy and entropy. This has important implications for many applications (synthesis of new compounds, meteorology, and industrial engineering).
10.2 Explain the relationship between energy transfer and disorder in the universe.
10.3 Analyze the energy changes involved in physical and chemical processes using calorimetry.
10.4 Apply Hess's law to determine the heat of reaction.
Broad Concept: Oxidation-reduction reactions occur by electron transfer and constitute a major class of chemical reactions. Examples of redox reactions occur everywhere; their consequences are experienced daily.
11.4 Identify the components, and describe the processes that occur in an electrochemical cell.
11.5 Explain how a typical battery, such as a lead storage battery or a dry cell, works.
11.6 Compare and contrast voltaic and electrolytic cells and their uses.
11.7 Calculate the net voltage of a cell given a table of standard reduction potentials.
Physics Learning Standards for a Full First-Year Course in Grade 9 or 10
1. Motion and Forces
Broad Concept: Newton's laws of motion and gravitation describe and predict the motion of most objects.
1.10 Interpret and apply Newton's third law of motion.
Broad Concept: The laws of conservation of energy and momentum provide alternate approaches to predict and describe the movement of objects.
Broad Concept: Heat is energy that is transferred between bodies that are at different temperatures by the processes of convection, conduction, and/or radiation.
3.2 Differentiate between specific heat and heat capacity.
3.3 Explain the relationship among temperature change in a substance for a given amount of heat transferred, the amount (mass) of the substance, and the specific heat of the substance.
3.4 Recognize that matter exists in four phases, and explain what happens during a phase change.
Broad Concept: Waves carry energy from place to place without the transfer of matter.
4.2 Recognize the measurable properties of waves (e.g., velocity, frequency, wavelength) and explain the relationships among them. *
4.6 Recognize the effects of polarization, wave interaction, and the Doppler effect.
4.8 Explain the relationship between the speed of a wave (e.g., sound) and the medium it travels through.
4.9 Recognize the characteristics of a standing wave and explain the conditions under which two waves on a string or in a pipe can interfere to produce a standing wave.
Broad Concept: Stationary and moving charge particles result in the phenomenon known as electricity and magnetism.
5.2 Interpret and apply Coulomb's law.
5.3 Explain the difference in concept between electric forces and electric fields.
5.4 Develop a qualitative and quantitative understanding of current, voltage, resistance, and the connection between them.
5.5 Identify appropriate units of measurement for current, voltage, and resistance, and explain how they are measured.
5.6 Analyze circuits (find the current at any point and the potential difference between any two points in the circuit) using Kirchoff's and Ohm's laws.
Broad Concept: Oscillating electric or magnetic fields can generate electromagnetic waves over a wide spectrum of energies.
6.2 Explain how the various wavelengths in the electromagnetic spectrum have many useful applications such as radio, television, microwave appliances, and cellular telephones.
6.3 Calculate the frequency and energy of an electromagnetic wave from the wavelength.
6.4 Recognize and explain the ways in which the direction of visible light can be changed.
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