1. May 2-20

2.  4. Hannah did an experiment to study the rate of photosynthesis in the water plant Elodea. She placed a piece of Elodea in a beaker of water and set the beaker 10 centimeters (cm) from a light source. Keesha counted the bubbles released from the plant every minute for 5 minutes. She repeated the process two more times. First, she moved the light to 20cm from the beaker, and then she moved the light to 30 cm from the beaker. (SC.8.N.1.1)  What is the outcome variable (dependent variable) in this experiment?  A. The number of bubbles produced.  B. The type of plant placed in the beaker.  C. The amount of time the bubbles were counted.  D. The distance of the light source from the plant.

3.  5. Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower. (SC.8.N.1.1) (10 pts)  a.. What was the initial observation? __________________________________________  Identify the-  b. Control Group___________________________________  c.. Independent (Manipulated) Variable___________________________  d. Dependent (Responding) Variable _____________________________  e. What should Homer's conclusion be? ______________________________________________________________________________  f. What improvements would you make to this experiment?  1.________________________________________________________  2.________________________________________________________

4.  Star Wars Day Which energy transformation takes place in the generator of the plant? (SC.7.P.11.2) a. Chemical energy into electric energy b. Electrical energy into mechanical energy c. Chemical energy into mechanical energy d. Mechanical energy into electric energy

5. . A path created for a current that allows only one route for the current is called a ______. (SC.8.P.13.1) a. Parallel circuit b. Parallel current c. Series circuit d. Series current

6.  Which of the following would be an example of a series circuit? (SC.8.P.13.1)  Electric sockets in the home  Street lights outside your house  Computers in an office building  An old string of holiday lights

7.  If the north poles of two bar magnets are brought together, which is true? (SC.8.P.13.1)  The two north poles will repel each other.  The two north poles will attract each other.  No force will be experienced between the two magnets.  One north pole will become a south pole due to the interaction.

8. The following is a diagram of two horseshoe magnets. (SC.6.P.13.1) What will happen if the two magnets are brought closer to each other? 1.They will repel each other. 2.They will attract each other 3.They will neither attract nor repel each other 4.They will first attract and then repel each other.

9.  A magnetic force surrounds _______.(SC.8.P.13.1)  A. all moving charged particles.  B. only particles that move in a magnetic wire.  C. all charged particles that stay in a fixed position.  D. only charged particles that move in a straight line.

10.  Explain the picture on the left  Throwback Thursday  Knowledge gained from many observations that EXPLAINS natural events is ___________ ____________.

11. The diagram shows what happens to a beam of light when it moves from one medium to another. Which property of light changes when it moves as shown in the diagram? (SC.7.P.10.3) 1.Color 2.Speed 3.Wavelength 4.Temperature

12.  Imagine a glass of lemonade with ice  List all possible ways thermal energy may be transferred

13. Electromagnetic waves Travel through…. Examples…. Emitted by…. Carry energy called…. ____________________________ Or ____________________________ 1. 2. 3.

14.  What did Democritus believe an atom was? (SC.8.p.8.7)  A solid, indivisible object  A tiny particle with a nucleus  A nucleus surrounded by an electron cloud  A tiny nucleus with electrons surrounding it

15.  Why were Rutherford’s students surprised by the results of the gold foil experiment? (SC.8.p.8.7)  They didn’t expect the alpha particles to bounce back from the foil.  They didn’t expect the alpha particles to continue in a straight path.  They expected only a few alpha particles to bounce back from the foil.  They expected the alpha particles to be deflected by electrons.

16.  How do halogens differ from noble gases? (SC.8.p.8.7)  Halogens are metalloids, whereas noble gases are nonmetals.  Halogens are semiconductors, whereas noble gases are conductors.  Halogens are solids at room temperature, whereas noble gases are gases.  Halogens form compounds, whereas noble gases generally do not.