With the new School Board policy in place, I will now be sending (and collecting) all assignments through e-mail. So if you are seeing this and cannot access your student email, please send me an email (with an account you do have access too) @ email@example.com and I will send your work to you.
Past work as follows:
In dealing with this unprecidented situation, I have made a few changes to the way I will give assignments. Everything will be posted on this page and will be E-mailed out as well. All work may be kept after completion and turned in at a later date (TBD). Don't hesitate to reach out to me if you have any questions at firstname.lastname@example.org.
Be well and stay safe!
Week of April 20th:
Directions: Determine whether the italicized term makes each statement true or false. If the statement is true, write true in the blank. If the statement is incorrect, write in the blank the term that makes the statement true.
1. A fluid is a liquid or a solid.
2. Buoyancy is the ability of a fluid to exert a downward force on an object immersed in it.
3. If the buoyant force on an object is greater than the weight of the object, the object will sink.
4. The buoyant force on an object in a fluid is equal to the weight of the fluid displaced by the object.
5. Archimedes’ principle states that pressure applied to a fluid is transmitted unchanged throughout the fluid.
6. As the velocity of a fluid increases, the pressure exerted by the fluid increases.
7. Temperature and viscosity are inversely related; that is, higher temperature means lower viscosity.
Directions: Answer the following questions on the lines provided.
8. A hydraulic machine can be used to lift extremely heavy objects. Why is the fluid in the hydraulic machine a liquid rather than a gas?
9. A block of wood is floating in water. The weight of the part of the block above water is one-third of the total weight of the block. What is the weight of the water displaced by the block of wood? Explain your answer in terms of Archimedes’ principle.
10. A passenger jet in the air increases its speed. Does the downward force of air on the top of the wings increase or decrease? Does the net lifting force of the air on the wings increase or decrease? Explain your answer.
Week of April 5th:
Directions: Match the terms in Column II with the definitions in Column I.
Write the letter of the correct term in the blank or on a separate sheet of paper.
1. heterogeneous mixture containing a liquid in which
visible particles settle
2. contains two or more gaseous, liquid, or solid
substances blended evenly throughout the mixture.
3. substance in which all atoms are alike
4. any material made of two or more substances
that can be physically separated
5. the scattering of light by colloidal particles
6. heterogeneous mixture with larger particles
that never settle
7. a mixture in which different materials can be
8. homogeneous mixture of particles so small they
cannot be seen and will never settle to the bottom
of their container
9. substance in which two or more elements are
combined in a fixed proportion
a. Tyndall effect
c. heterogeneous mixture
h. homogeneous mixture
Directions: Fill in the table below with the element below that matches its description.
10. radioactive metal ____________________
11. bendable and resists corrosion ____________________
12. found in windowglass and computer chips ____________________
13. found in chlorophyll ____________________
14. used in body implants ____________________
15. has a high density ____________________
Week of March 30th:
Directions: Answer the following questions on the lines provided or a separate sheet of paper.
1. How is the chemical symbol of an element determined?
2. What are atoms composed of?
3. Are electrons, protons, or neutrons the smallest particles? If not, what are?
4. How many types of quarks are there and what is the name of one of them?
5. Why do scientists use models to study atoms?
6. Why has the atomic model changed over time?
7. Why is the current atomic model called the “Electron Cloud Model”?
Directions: Match the term in Column I with the definition in Column II.
a. positively charged particle
b. negatively charged particle
c. neutral particle
d. smaller particles that make up
protons and neutrons
e. positively charged center of an atom