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WorksheetsAwasha Review Questions
Total questions: 24
Worksheet time: 13mins
What is the first step in the Scientific Method?
Hypothesis
Conclusion
Observation
Experiment
A null hypothesis can be proven wrong.
True
False
what are the basic unit of length?
Litre
Kg
Metre
Degrees Celsius
10 cms is equal to ........ millimeters
100mm
10mm
1000mm
1mm
Iodine test is used to test for the presence of :
water
lipids
sugars
Starch
Biuret reagent is used to detect the presence of :
water
sugars
lipids
proteins
Which part of microscope controls the diameter of light source beam and amount of light sent to the condenser?
Condenser
Iris Diaphragm
on/off switch
Light intensity adjustment
While working on microscopes, What happens to the working distance as you go from low power to high power?
increased
decreased
remains same
Total magnification is obtained by magnifying power of
eyepiece
condenser lens
both the objective lens and eyepiece
the objective lens
Identify the cell type:
animal cell
onion epidermal plant cell
bacterial cell
What solution was used to see the slides under microscope?
Iodine solutions
Biurett reagent
Methylene blue
Bromophenol blue
What is cyclosis in Elodea leaf?
Can be seen without using microscope
Nucleus pushed to a side due to large central vacuole
Cytoplasmic streaming, where there is flow inside the cytoplasm
What is diffusion?
is the net movement of molecules from an area of lower concentration to an area of higher concentration
is the net movement of molecules from an area of higher concentration to an area of lower concentration
Osmosis: A process by which molecules of a solvent tend to pass through a semipermeable membrane from less concentration solution into a more concentrated one.
False
True
What are enzyme?
Enzymes are proteins in nature
Enzymes are very specific
All statement are true
They act as catalyst and speed up chemical reaction
Catalase is an inorganic catalyst
True
False
Temperature has no effect on catalase action
False
True
What type of respiration requires oxygen?
Anaerobic
Fermentation
Aerobic
All of them
Anaerobic respiration does not require molecular oxygen and found in bacteria and yeasts.
True
False
Which reaction during photosynthesis yields glucose molecules?
light reaction
dark reaction
Why do most leaves appear green in color?
because the green wavelength are not absorbed by chlorophyll
because the are formed from green colored seeds
because they have convert water from roots to green color
Which method can be used to separate pigments based on their solibility?
paper chromatography
spectophotometer
Which instrument helps in the absorption of the complete chlorophyll mixture?
paper chromatography
respirometer
spectrophotometer
يقول سلمان بن خالد: يا وجهك الي خلقه الله رضي و ضحوك و يا صوتك الي من يمله وهو سامعه
شو اسم القصيدة؟
78
73
74
75
