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MTTC Integrated Science Exam Questions With Correct Answers.

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MTTC Integrated Science Exam Questions With Correct Answers. Independent Variable - answerThe experimental factor that is manipulated; the variable whose effect is being studied. Placed on the x-axis (horizontal) on a graph. Dependent Variable - answerThe variable that is measured in an experim...

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  • October 18, 2024
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  • 2024/2025
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©SIRJOEL EXAM SOLUTIONS
10/10/2024 11:44 AM



MTTC Integrated Science Exam Questions
With Correct Answers.


Independent Variable - answer✔The experimental factor that is manipulated; the variable whose

effect is being studied. Placed on the x-axis (horizontal) on a graph.


Dependent Variable - answer✔The variable that is measured in an experiment. Placed on the y-

axis (vertical) on a graph.


Scientific theory - answer✔Must be repeatable. Possible to be disproved and capable of change.


Sampling and Sample Size - answer✔Random sampling is the preferred, but isn't always

possible. A large sample will yield the most accurate information.


Manipulating Variables - answer✔Only one variable should be manipulated at a time.


Control variable - answer✔A factor that is held constant to test the relative impact of an

independent variable


Response to Lab Accident - answer✔In most cases, 911 should be called immediately.


Response to Fire in a Beaker or Flask - answer✔Do not use a fire extinguisher. Just place a

watch glass or wet towel over it to cut off Oxygen supply.

, ©SIRJOEL EXAM SOLUTIONS
10/10/2024 11:44 AM


Guidelines for Dissections - answer✔Specimens should be rinsed before using. Latex glover

preferred. Avoid use of formaldehyde/dispose of correctly. Need to provide alternative for

students with moral objections to assingment.


Storing Lab Chemicals - answer✔Store all in secured, dry area. Acids locked in separate area.


Origin of Biological Sciences - answer✔Traced back to ancient Greeks (i.e. Aristotle)


Andrea Vesalius - answer✔Dissected human bodies; created a book on anatomy


Anton van Leeuwenhoek - answer✔Father of Microscopy, first to see and describe bacteria,

yeast plants, and microscopic life found in water


Scanning Electron Microscope (SEM) - answer✔Instead of a light, a beam of electrons pass

through specimen. Resolution about 1,000 times greater than light microscope. Will kill

specimen though.


Robert Hooke - answer✔Famous for Hook's law describing elasticity. But called a "virtuoso",

able to contribute findings to any major field in science


Carl Von Linnaeus - answer✔Famous for binomial system of nomenclature. Each living

organism has two names, a genus and species. Considered father of modern ecology and

taxonomy


Pasteur - answer✔Discovered role of microorganisms in the cause of disease, pasteurization, and

rabies vaccine.

, ©SIRJOEL EXAM SOLUTIONS
10/10/2024 11:44 AM


Koch's Postulates - answer✔Specific diseases caused by specific pathogens


Cell theory - answer✔Cell is the common structural unit in plants and animals. Proposed by

Mattias Scheleiden and Schwann.


Watson and Crick - answer✔Discovered the structure of DNA was a double helix (in the 1950s).

Made it possible to understand how DNA replicated and synthesized proteins


Commonalities Among all Sciences - answer✔- Systems, order, and organization


- Evidence, models, and explanation

- Constancy, change, and measurement

- Evolution and equilibrium

- Form and function


Empirical Evidence - answer✔All evidence is empirical; all evidence must be observed by the

five sense.


Peer-reviewed Journals - answer✔Most accepted source for information on scientific

experiments and studies


Air Pollution - answer✔Chemicals in the air; include carbon monoxide, sulfur dioxide, and

chlorofluorocarbons (CFC's)


Water Pollution - answer✔Contaminants enter water by ground runoff or by leaching

, ©SIRJOEL EXAM SOLUTIONS
10/10/2024 11:44 AM


Thermal pollution - answer✔Factories dump water at high temperatures which increases normal

water temperatures. This means the water can hold less gas, disrupting the ecosystem


Greenhouse gasses - answer✔I.e. carbon dioxide and nitrous oxide. Concentration of them is

increased by burning fossil fuels. These gasses absorb and trap heat, therefore warming the

planet


Acid ran - answer✔Sulfur and nitrous oxides converted to acids and contaminate water supplies


Prokaryotes - answer✔Single-celled organisms that do not have a membrane-bound nucleus


Flagella - answer✔Appendages on bacteria cells; used for movement


Pili - answer✔Used by bacteria cells to attach to other cells


Cell Wall - answer✔a thin membrane around the cytoplasm of a cell


Cell membrane - answer✔a phospholipid layer that covers a cell's surface and acts as a barrier

between the inside of a cell and the cell's environment


Eukaryotes - answer✔organisms whose cells contain a nucleus and other membrane bound

organelles


Nucleus - answer✔a part of the cell containing DNA and RNA and responsible for growth and

reproduction

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