Evaluation 1

1.      Which of the following is NOT an instrument used to observe living organisms?

A) Microscope B) Pipette C) Hand lens D) Binoculars  

• A) Microscope

• B) Pipette

• C) Hand lens

• D) Binoculars

Answer explanation

here are explanations for the answers:

B) Pipette is not an instrument used to observe living organisms. Pipettes are used in laboratory settings for transferring precise volumes of liquids, but they are not used for observing living organisms directly. Microscopes, hand lenses, and binoculars are all instruments commonly used for observing living organisms.

C) Telescope is the instrument used to observe a lion in the savannah. Binoculars could also be used, but a telescope would provide a higher magnification and better image quality, making it easier to observe the lion from a distance.

A) Microscope is the instrument used to observe the organism that causes cholera in humans. Cholera is caused by a bacterium called Vibrio cholerae, which is too small to be seen with the naked eye. A microscope is needed to observe the bacterium and study its structure and behavior.

C) The first three steps of the scientific approach in studying living organisms are observation, questioning, and hypothesis. This involves first observing a phenomenon or problem, then asking questions about it, and finally formulating a hypothesis or tentative explanation based on the available evidence. Once a hypothesis is formed, it can be tested through further observation and experimentation.

B) The part of the microscope where you place your eye before observing an organism is called the eyepiece or ocular lens. This lens provides a magnified view of the specimen that has been magnified by the objective lens. The other parts of the microscope listed are the base (which provides stability), body tube (which holds the objective and eyepiece lenses in alignment), and stage (which holds the specimen).

1.      Which of the following instruments is used to observe a Lion in the savana?

A) Microscope B) Stethoscope C) Telescope D) Hand lens

• A) Microscope

• B) Stethoscope

• C) Telescope

• D) Hand lens

Answer explanation

C) Telescope is the instrument used to observe a lion in the savannah. Binoculars could also be used, but a telescope would provide a higher magnification and better image quality, making it easier to observe the lion from a distance

1.      Which of the following instruments is used to observe the organism that causes Cholera in man?  

A) Microscope B) Stethoscope C) Telescope D) Hand lens

• A) Microscope

• B) Stethoscope

• C) Telescope

• D) Hand lens

Answer explanation

Cholera is caused by the bacterium Vibrio cholerae, which is too small to be seen with the naked eye. A microscope is needed to observe the bacterium and study its structure and behavior.

4.      The first three steps of the scientific approach in studying living organisms in their order are:

A)    Questioning, hypothesis, observation  B) observation, hypothesis, questioning  C) observation, questioning, hypothesis D) hypothesis, observation, questioning

• A)    Questioning, hypothesis, observation

•  B) observation, hypothesis, questioning

• C) observation, questioning, hypothesis

• D) hypothesis, observation, questioning

Answer explanation

The scientific approach involves a series of steps that scientists use to investigate and understand natural phenomena. The first three steps of the scientific approach are observation, questioning, and hypothesis. Observation involves noticing a phenomenon or problem, questioning involves asking questions about the phenomenon, and hypothesis involves formulating a tentative explanation based on the available evidence.

5.      The part of the microscope where you place your eye before observing an organism is called:

A)    Base B) Eye piece  C) body tube D) stage   

• A)    Base

• B) Eye piece

• C) body tube

• D) stage

Answer explanation

The eyepiece or ocular lens is the part of the microscope where you place your eye before observing an organism. The eyepiece provides a magnified view of the specimen that has been magnified by the objective lens. The other parts of the microscope listed are also important components of the microscope, with the base providing stability, the body tube holding the lenses in alignment, and the stage holding the specimen.

Identify this piece of equipment

(a)  

Is NOT one of the rules of the laboratory

• Be on time

• Pay attention to the teacher and respect

• Bring materials prepared

• Maintain cameras off

Be alert and proceed with caution at all times in the lab.  _______________ immediately of any unsafe conditions you see.

• Assess and fix
• Notify the teacher
• Notify your lab group
• Call out, "Code 1"

When is it OK to eat or drink at the lab tables?

• Always

• Only during group work, not during labs

• Never

• Whenever I'm hungry

This symbol means

• keep a cover on your containers to avoid fumes

• take special precautions with disposal

• dispose of all specimens in the trash at the end of the lab