Gr9chemfa1
First formative assessment in grade 9 science - chemistry strand.
- 1.1) Chemistry is the study of
- A.
The properties of matter
- B.
The energy used with matter
- C.
The properties of matter and the effect of energy on the properties of matter
- D.
The uses of matter to make me uncomfortable
- E.
None of the above answers are correct
- 2.Chemists might use, in experiments
- A.
Gravity
- B.
Nuclear forces
- C.
Worm holes
- D.
Light and heat
- E.
None of the above answers are correct
- 3.A quantitative physical property
- A.
Could be that the metal lead is more dense than water
- B.
Could be that the metal lead reacts with acid to give bubbles
- C.
Could be that the metal lead is used in car batteries.
- D.
Benzene boils at 60 degrees C at nomal atmospheric pressure.
- E.
None of the above answers are correct
- 4.A qualitative physical property
- A.
Could be that the metal lead is more dense than water
- B.
Could be that the metal lead reacts with acid to give bubbles
- C.
Could be that the metal lead is used in car batteries.
- D.
Benzene is used in making dyes
- E.
None of the above are correct
- 5.Breaking an egg shell, then scrambling the yolk and white inside
- A.
Can’t involve physical properties since you can’t reverse what you did.
- B.
Is only a quantitative description of the process done with the egg
- C.
The individual kinds of matter still have the same physical properties.
- D.
Breaking and scrambling eggs has nothing to do with chemistry
- E.
None of the above answers are correct
- 6.If an animal has dark feathers, can fly, can float and move on water, has a short flat beak, and can quack
- A.
It could be a duck, since it has the properties of a duck
- B.
Is probably not a duck because only qualitative terms were used
- C.
This description of an animal has nothing to do with matter
- D.
All the above are correct.
- E.
None of the above answers are correct
- 7.There are two Erlenmeyer flasks filled with colorless, odorless liquids
- A.
As the physical properties mentioned are the same they are likely the same substance.
- B.
More tests of physical properties are needed before saying they are the same substance.
- C.
The tests of physical and chemical properties are needed before saying they are the same substance.
- D.
Tests are only needed if I am going to do something with these substances
- E.
None of the above answers are correct
- 8.When a boiling point is measured for a substance and is compared to textbook data
- A.
Safety doesn’t matter, it is just boiling stuff
- B.
You don’t need to use numbers to describe the boiling point
- C.
You need to be sure to measure it the way the book number did
- D.
For a liquid you need to ensure it the same air pressure as the book reports.
- E.
Both c) and d) need to be considered to see why they are alike or not.
- 9.When a powder is sprinkled into a flame
- A.
Qualitative Physical properties are being observed
- B.
Quantitative Physical properties are being observed
- C.
You are observing a property that can be used to identify maybe part of the substance
- D.
All of the above answers may be correct
- E.
None of the above answers are correct
- 10.Experiments are done by chemists
- A.
But properties are never measured in those experiments.
- B.
To see what, if any, changes occurs in the physical and chemical propertie
- C.
But are usually only done once to save money
- D.
But always require a lot of time
- E.
None of the above answers are correct
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