chemistry questions for 9th grade test

1. what can you measure in chemistry?
2. Please mention the tools you can use in laboratory!
3. what is pure substance?
4. what are the differences of mixture and compounds?
5. please mention the technique of separation and explain one of them!
6. What are the differences of boiling and evaporation?
7. what is element?
8. Please explain the characteristics of each matter!
9. Please give 5 examples of mixture!
10. what is stated in Kinetic theory?

9th grade physics summary

1. there are 2 kinds of measurements. they are vector and scalar measurement.
2. vector measurement is the measurements  which  involve the direction of an object.
3. scalar measurement is the measurement that omit the direction of an object.
4. the example of vector measurements are velocity or force.
5 the example of scalar
measurements are mass, length
etc
6. velocity is the description of speed and direction of moving objects.
7. speed is the description of object speed.
8. acceleration is the change of speed in particular time.
9. v=s/t (v= velocity)
               (s = distance)
              (t = time)
10. gravititional acceleration will always be the same on the 1 plane.
11. the acceleration of sun light in vacuum is the same everywhere
12. deceleration is the decrease of speed in a particular time.
13. there are 2 kinds of acceleration. they are uniform and non uniform acceleration.
14. constant speed means that the speed has no acceleration.
15. the speed of an.object is influenced by the surface of plane

8th grade chemistry final test sem. 2

Please answer the following question briefly
1. What is meant by fossil fuel?
2. what is cracking?
3. please mention the use of fossil fuel?
4. what are the problems we face about fossil fuels?
5. what is the solution?
6. what are the characteristics of homologous series compound?
7. what are the chemical properties of alkane?

7th grade chemistry final test sem. 2

Please answer the following questions briefly.
1. what is atom?
2. What is meant by nucleon, proton and neutron?
3. what is isotope?
4. Please define Noble gas!
5. why do atoms form ions?
6. what is the difference of ionic bonding and covalent bonding?
7. please give an example for ionic bonding and covalent bonding

7th grade physics final test

Please answer the following questions briefly.

1. what are the types of energy that you know?
2. what is the meaning of conservation of energy?
3. what is work?
4. Please give examples that describe work?
5.. what is meant by conduction,.convection and radiaton?
6. please give example that describe conduction?
7. please give example that describe radiation

Physics 8th grade final test sem.2

Please answer the following questions briefly

1. what is meant by neutral wire, live wire and earth wire?
2. what is the main function of circuit breaker?
3. what are the hazards of using electricity?
4. why do we need double insulation?
5. What are the properties of magnet?
6. how to do magnetic induction?
7. how to do magnetisation by using electricity?
8.what are the uses of magnet in daily life (3 answers)

8th grade physics note (ch. 13)

Practical electricity

1. For electrical supply to our home, there should be a cable consist of live wire and neutral wire.
2. live wire is the wire which contain electricity and has potential difference. this wire is dangerous, while neutral wire is the wire which has no potential difference. in other words, the wire has no electrical flow.
3. in order to reduce the dangers of using electricity, we need to have : earth wire, fuses and switch, double insulation.
4. earth wire is the wire which is used to flow the extra electric current to earth instead of our hands.
5. fuses are used to prevent electrical fire which is caused by exceeding current.