Language Score

The Monthly Language Score of Junior High Students
2013 / 2014
Name          February
Alan                B
Alvin               C
Andreas         C
Andy               C
Angel                  C
Celine              C
Cindy              C
Don                  B
Duta                  C
Fany                D
Gabz                  A
Hana                  C
Isti                     D
Jonathan           B
Jose                  D
Jovina               D
Leanna             A
Lia                   C
Maggie               B
Natalie            D
Oktavia               D
Stevanus            C
Tommy                D

9th grade biology

1. There are 5 main substances that are needed by humans. they are carbohydrates, protein, fats, vitamins and dietary fibre.
2. Carbohydrates are organic compound that provide us with energy.
3. there are 3 kinds of carbohydrates, they are monosaccaharides, dissacharides and polysaccharides.
4. Proteins are very complex organic substances that help us to grow.
5. Kwashiorkor is one of desease that is caused by lacking of protein.
6. Fats are used to provide a source and storage of energy, protect organs from physical.injuries.
7. Water has the function to be solvent for inorganic and organic compounds.
8. there are 4 main digestive process. they are mechanical digestion, chemical digestion, absorption and assimilation.
9. inflammation, polyneuritis, and formation of ulcers are some effects of consuming excessive alcohol.

9th grade physics

1. pressure is force per unit area.
2. a rectangular wooden block measuring 0.250 m x 0.125 m x 0.840 m is resting on a table top. it has mass of 15 kg. calculate the greatest pressure and least pressure!
3. great pressure can be overcome by sharing the pressure to large area.
4. work is force per distance of an object.
5. Please give examples of work.
6.energy can only be changed, it can not be created or destroyed.
7. Energy is the capability to do work
8. there are several kinds of energy, they are chemical, potential, elastic and kinetic energy.
9. Power is the rate of work done
10. Brownian law states that all particles move in random and constant motion

chemistry final test (9th grade)

Please study from text book pages 121,122,123,141,142. please memorize the way to finish the questions.

9th grade chemistry summary ch. 6-7

1. there are 2 kinds of bonding. they are ionic bonding and covalent bonding.
2. ionic bonding is type of bond that is formed between positively charged and negatively charged ions by the transfer of electrons.
3. covalent bonding is type of bond that is formed when two atoms are joined together by sharing electrons.
4. for the comparison of those bonding, you can check on pg. 94 textbook.
5. each carbon atom in diamond is bonded to four other carbon atoms by strong covalent bonds.
6. each carbon atom of graphite is joined to three other carbon atoms in the same plane.

physics summary for 9th grade

1.  There are several kinds of main pressures. they are air pressure, water pressure and force pressure.
2. Pressure is influenced by the area and the weight / force of object.
3. The narrower the area of an object, the greater the pressure will be.
4. according to Pascal, liquid will give the same pressure to all parts of isolated container.
5.  work means force that causes displacement.
6. there are 2 kinds of energy. they are kinetic energy and potential energy.
7. according to the Principle of energy conservation, energy can't be created nor destroyed. it can only be changed.
8. in formula, we can express the principle as Ek = Ep.
9. Power means the work done per time.

chemistry 7th grade test sample

1. what can you measure in chemistry?
2. what are the tools in chemistry lab?
3. what is pure substance?
4. what are the differences between mixture and compound?
5. what are the techniques to separate mixture? explain 3 of them.