BC Science 8 Quiz: 1.1 Observing Living Things

1. An organism made up of many cells is known as ___________.

A complex organism.

A multicellular organism.

An intelligent organism.

An organism capable of reproducing.

An organism made up of many cells is known as a multicellular organism because multicellular organisms are composed of multiple cells that work together to perform various functions and maintain the overall health and functioning of the organism. This is in contrast to unicellular organisms, which are made up of only one cell. The term "multicellular" refers to the presence of multiple cells, indicating a higher level of complexity and specialization in the organism's structure and function.

Explanation

An organism made up of many cells is known as a multicellular organism because multicellular organisms are composed of multiple cells that work together to perform various functions and maintain the overall health and functioning of the organism. This is in contrast to unicellular organisms, which are made up of only one cell. The term "multicellular" refers to the presence of multiple cells, indicating a higher level of complexity and specialization in the organism's structure and function.

2. Single-celled organisms are called _________.

Single-celled organisms are referred to as "unicellular" because they consist of only one cell. This term accurately describes their structure and distinguishes them from multicellular organisms, which are composed of multiple cells.

Explanation

Single-celled organisms are referred to as "unicellular" because they consist of only one cell. This term accurately describes their structure and distinguishes them from multicellular organisms, which are composed of multiple cells.

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3. Which is not a characteristic of ALL living things?

Living things respond to their environment.

Living things breathe.

Living things must get rid of wastes.

Living things grow.

Living things need energy.

Not all living things require a respiratory system and breathing capabilities. For example, plants survive without breathing - they instead furl themselves through photosynthesis.

Explanation

Not all living things require a respiratory system and breathing capabilities. For example, plants survive without breathing - they instead furl themselves through photosynthesis.

4. Yukuno has decided that the object she is viewing through the microscope requires the high-power objective lens. How should she focus the image while viewing the object at high-power?

She should turn the fine focus knob.

She should turn the coarse focus knob.

She should get glasses.

She should distance the eyepiece lens from the objective lens.

When viewing an object through a microscope with the high-power objective lens, the fine focus knob should be used to focus the image. The fine focus knob allows for small adjustments to be made to bring the object into clear focus. The coarse focus knob, on the other hand, is used when initially focusing the image at low power and should not be used when viewing the object at high-power. Getting glasses or distancing the eyepiece lens from the objective lens are not relevant actions for focusing the image in this scenario.

Explanation

When viewing an object through a microscope with the high-power objective lens, the fine focus knob should be used to focus the image. The fine focus knob allows for small adjustments to be made to bring the object into clear focus. The coarse focus knob, on the other hand, is used when initially focusing the image at low power and should not be used when viewing the object at high-power. Getting glasses or distancing the eyepiece lens from the objective lens are not relevant actions for focusing the image in this scenario.

5. Mr. Sitzofritz is trying to find the total magnification power of his compound light microscope. He knows that he is using a typical compound light microscope while viewing an object at medium-power. What is the total magnification power?

50X

400 000X

35X

100X

2X

10X = eyepiece lens
10X = medium-power objective lens.
Total magnification = 100X (multiplication)

Explanation

10X = eyepiece lens
10X = medium-power objective lens.
Total magnification = 100X (multiplication)

6. A compound light microscope uses two lenses, and a light source. They can help you focus on two details or things that are very close together, and indistinguishable to the human eye. This is called ____________________.

Zooming in.

Magnification power.

Microscopic separation.

Resolving power.

A compound light microscope uses two lenses and a light source to enhance the resolving power. Resolving power refers to the ability of the microscope to distinguish between two closely spaced objects or details that are indistinguishable to the human eye. By using multiple lenses and a light source, the microscope can increase the resolving power, allowing for better clarity and visibility of fine details.

Explanation

A compound light microscope uses two lenses and a light source to enhance the resolving power. Resolving power refers to the ability of the microscope to distinguish between two closely spaced objects or details that are indistinguishable to the human eye. By using multiple lenses and a light source, the microscope can increase the resolving power, allowing for better clarity and visibility of fine details.