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WorksheetsREVIEW: Introduction to Chemistry
Total questions: 17
Worksheet time: 4mins
Which of the following statement is FALSE about Chemistry?
study of matter and its properties
study of energy transformation of different substances
study of how and why substances combine or separate to form other substances
none of the above
Which branch of chemistry studies the properties of chemical substances and the structure and composition of compounds and mixtures?
analytical chemistry
environmental chemistry
industrial chemistry
physical chemistry
Which branch of chemistry is concerned with chemical substances that do not contain carbon-carbon bonds?
biochemistry
inorganic chemistry
polymer chemistry
thermo chemistry
What step in the scientific method involves gathering information about the inquiry or problem from reliable sources?
making an observation
asking a question
conducting a research
formulating a hypothesis
"There is no significant relationship between the presence of cadmium and plant growth rate."
What kind of hypothesis is this statement?
alternative
cause and effect
null
"There will be a chemical reaction if a half pack of mentos is mixed with a liter of coke."
What kind of hypothesis is this statement?
alternative
cause and effect
null
"If soap is applied to a surface with virus, then the virus will be killed."
Identify the independent variable.
amount of soap applied
condition of virus (alive or dead)
temperature
type of virus
"If a person gets eight hours of sleep, then his level of functionality increases."
Identify the dependent variable.
hours of sleep
gender of the person involved
level of functionality
time of sleep
"If a person eats greasy food, then he has higher chances of getting acne."
Identify the controlled variable.
amount of greasy food intake
chances of a person getting acne
kind of greasy food
gender of the person involved
Hypothesis: The duration of light exposure has a significant relationship to fish reproduction.
Identify the experimental set-up.
Groups of fishes exposed to varying duration of light
Group of fishes not exposed to light
Which of the following numbers is expressed in four (4) significant figures?
0.001
0.010
10.00
10.0 X 104
Which of the following numbers has the MOST number of significant figures?
0.000123
0.012300
1.23 x 10-4
1.230 x 10-5
Express 45 629 kg into its scientific notation following the correct number of significant figures.
4.56 x 104
4.56 x 10-4
4.5629 x 104
4.5629 x 10-4
Express 6.02 x 10-5 m using standard notation.
60 200 m
602 000 m
0.000602 m
0.0000602 m
What is the volume of the liquid (mL)?
42.5 mL
43.0 mL
43.5 mL
44.0 mL
Which results show LOW accuracy and precision?
Student A
Student B
Student C
Which results show HIGH accuracy and precision?
Student A
Student B
Student C
