EdExceL SCIENCE ANSWER KEY

For the last handout:

1.  C
2.  B
3.  B
4.  B
5.  C
6.  B
7.  B
8.  C
9.  B
10.  D
11.  (a)  It gives shape.  (b)  It supports the body.  (c)  It protects organs inside the body.
12.  iron & sand - use a magnet, stones & sand - use a seive, sand & water - filtration, salt & water - evaporation
13.  Advantage:  It doesn't give off harmful emmissiona and readily availbale
       Disadvantage:  It is expensive and not easy to replace gasoline.
14.  (a)  water resistance  (b)  streamlined, faster (counter react the water resistance)
15.  C
16.  D
17.  A
18.  B
19.  C
20.  A
21.  B
22.  A
23.  A
24.  C
25.  (a)  asexual rreproduction  (b)  Only one parent plant is required.  Young plants are identical to the parents.  (good traits are always passed on)
26.  (a)  Metal R - Metal S  - Metal P - Metal Q
       (b)  copper + iron sulfate
27.  (a)  Artificial satellite are man made satellite and launch into the orbit by using rockets.
       (b)  It is used in scientific research & to study universe.
28.  C
29.  D
30.  A
31.  B
32.  B
33.  C
34.  D ( 39 - 84) Period - horizontal & Group - vertical
35.  C
36.  B
37.  D
38.  As the intensity of the light is increasing, there will be a point that the rate of photosynthesis will be constant after a certain point is already reached.
39.  (left to right/ top to bottom)
       (a)  FF     Ff
              Ff     ff
       (b)  ff (cystic fibrosis)
40.  (a)  100 g
       (b)  For a complete reaction, calcium chloride, hydrogen gas & carbon dioxide should be produced.  In this case, water is produced instead.  even if, the mass should still be 100 g.  If there will be losses in the reaction, it is possible that the reaction does not follo Law of Conservation of Mass such exampple is escape of gas or spillage of the sample.
41.  (a) & (b) - See picture.
       (c)  Moment of force = F X d = (5 N) (0.2 m) = 1 N-m
42.  (a)  Use 1 grdaient = 2 cm
       (b)  i.  See picture.
              ii.  Before disregarding, run another trial.
       (c)  i.  See picture.
              ii.  By using the projected line, the change in length for 100 g is 36 cm.
43.  (a)  Use goggles, gloves & labcoat.  Handle acid with care.
       (b)  The bigger the surface are, the longer the time it will react.
       (c)  If diluted acid will be used, it will slow down the reaction time.
44.  (a)  To know the effect of the different proportion of N, P, K in plant growth.
       (b)  The fertilizer that will produce the most pepper is fertilizer B (low in N & high in P & K)
       (c)  same condition (same amout of water & fertilizer)  & same location (sunlight)
       (d)  i.  amount of fertilizer
              ii.  plant growth
       (e)  That plant will serve as the CONTROL variable where all samples will be compared to.
         


God bless in your EdExceL examination.

GRADE 7 & 8: ATTENTION!!! VERY IMPORTANT!

The Final Test includes everything from Quarter 1 to Quarter 4 (Q1 - Q3: 20% each & Q4: 40%).  Please review your quizzes and quarter test.   Please do not forget to bring calculator.

PHYSICS 7:
Q1: Measurement (SigFig, SciNot, SI vs. English System, Base & Derived Calculation)
Q2:  Measurement (Density & Temperature Calculations)
Q3:  Thermal Expansion
Q4:  Linear Motion & Electric Circuit (See Answer Key to Chapter Test pages 464 - 472)

CHEMISTRY 7:
Q1:  Matter (States, Properties & Changes)
Q2:  Matter (Classification & Separating Techniques)
Q3:  Acids & Bases
Q4:  Atomic Development

PHYSICS 8:
Q1:  Forces & Newton's Law of Motion
Q2:  Work, Energy and Power & Simple Machines
Q3:  Pressure in Solids & Liquids
Q4:  Vibrations & Waves & Sound & Light

CHEMISTRY 8:  already in the letter sent


In short, ALL WILL BE PART OF THE TEST.  I explained this to the class and we even reviewed.


My sincerest apology.  Thank you.  God bless.

Grade 8 ANNOUNCEMENTS & REMINDERS

Dear Students:

Good day!  How's vacation?  Hope you are enjoying your happy days. Please be reminded of the following:


*  CHEMISTRY:
    -  Everyone is encouraged to submit the add on points requirement most esp. for the students with grade below 65.  For students above 65 may still submit.  You may choose any of the topics below.  Specific topic will be given to the required people to submit.  
Topics:  
1.  Grand Canyon, America
2.  Tanah Lot, Indonesia
3.  Wave Rock of Perth, Australia
4.  Chocolate Hills, Philippines
5.  Uluru, Australia
6.  Niagra Falls, Canada
7. Devils Marble Karlu Karlu, Australia
8.  Jabel Akakus, Libya
What to include?
1.  Location
2.  History (How it is formed?)
3.  Geology (Rock Type & How it is formed?)
4.  Pictures
5.  References (Complete URL)
Format:  Computerized, A4 paper, 1" all sides margin
Submission:  May 25 - 26, 2016 (W - Th)
    -  Please see the powerpoint presentations of Chemical Reaction & Rocks & Rock Cycle.
    -  These are the people required to submit.  See topics below.
        Daniel:  Belinda - 1, Fareza - 2, Gaby A. - 3, Jose - 4, Olive - 5, Kevin - 6, Stephan - 7 & Gab F.         - 8
        Ezekiel:  Bagus - 1, Rio - 2, Stephanie - 3, Steven - 4
        Samuel:  Dennis - 5, Andrea - 6, Defista - 7, Hanny - 8, Randy - 1, Stanley - 2, Olsen - 3
     -  Make Up Quiz:  Brian Jo & Olsen (May 15to 17 only!)  --- OK already!


*  PHYSICS:
    -  Please see powerpoint presentation of Vibration & Waves, Sound, & Light & Optics.
    -  May 19 (Th):  Quiz No 2 - Mirror:  Concepts, Calculations, & Practical Application and Lenses:
       Concepts &  Practical Application
    -  May 17 (T):  Submission of Physics Experiment:  Sound Reflection
    -  May 25 (W):  Add On Quiz - Lenses:  Calculations & Optical Instrument:  Eye
       Add On Quiz:  Read pp. 456 - 464.  Answer in 1 A4 paper.   This will be submitted on May 23
      (T) under Ms. Czhar. (Ms. Popy will announce the date of submission for her students.)
       A.  Self Assessment 10.1, numbers 1-4
       B.  A 4.00 cm tall object is placed a distance of 7.30 cm from a double convex lens having a
            focal length of 14.2 cm.  Determine the image distance and the image size.  Draw image
            formation.  Determine the nature of the image.
    -  No Exercise:
       Ezekiel:  Stephanie - 41 pts., Tania - 8 pts.
       Samuel:  Olsen - 10 pts., Sam - 6 pts. (depth)
    -  Failed To Do Exercise:  SONAR TECHNIQUE (For Ezekiel & Daniel only!)
       *  Write your GUS in 1/2 crosswise paper.  Please submit on May 17 (T).

           1.  A ship emitted the wave to the sea by oscillator and received the reflection of the 

         wave  after 4/5 s.  If the velocity of the sound in the sea water is 1500 m/s, find 

         the depth of the sea.
      2.  The oscillator vibration in a ship is received by hydrophone after 0.5 s if the      
         depth of the  is 280 m, find the velocity of the sound in the sea.
      3.  If the velocity of the sound in the sea water is 1500 m/s, and the depth of the sea is          3000 m, the reflection of the sound in the sea surface will be heard after _____ s?

     -  Reviewer in LENSES:  Exercise, Exercise1 & Exercise 2.
God bless.   Enjoy!  :) :) :)