AnswersPre-Algebra - MA3119 A Distance LearningExpressions with More Than One Operation

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Which of the following is the correct order for the steps of scientific inquiry?

A
observe, question, hypothesize, analyze, experiment, formulate a conclusion
B
question, observe, hypothesize, experiment, analyze, formulate a conclusion
C
question, hypothesize, observe, experiment, analyze, formulate a conclusion
D
observe, question, hypothesize, experiment, analyze, formulate a conclusion
6

Which of the following is an observation and not an inference?

A
A cup with steam coming from it will be hot to the touch.
B
Dark clouds in the sky will mean rain later in the afternoon.
C
Bubbles form when two chemicals are mixed together.
D
A plastic bag moving along the ground is being pushed by the wind.
7

A scientific theory _______.

A
describes what occurs every time in a given situation
B
is not validated by experimentation
C
can never be changed
D
is an explanation for a set of events
8

A student is conducting an experiment to determine how far a ball will roll down a ramp based on the angle of incline.

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Which type of graph is best for analyzing quantitative dependent and independent variables?

A
line graph
B
pie graph
C
bar graph
D
surface graph
10

How is a scientific law different than a scientific theory?

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11

Discuss the variations in foot shape and the type of shoes that are required for each foot shape.

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Explain why exercise programs must increase in difficulty and duration over time to remain effective.

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Explain the tangible physical benefits of warming up for and cooling down from a workout activity.

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Describe how exercise can positively affect your environmental health.

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Exercise has no positive effects on the nervous system.

A
T
B
F
16

What is the difference between an observation and an inference?

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17

Which of the following were effects of the growth of agriculture in the Midwest?

A
Safer and more versatile railroads made it easier to travel and settle the West.
B
Refrigerator cars helped the meatpacking industry to grow.
C
Longer rail lines made it easier to send crops to markets.
D
New railroads brought minerals and raw materials to iron and steel mills.
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Based on the information from the railroad and resource maps you just saw, where would you expect to find most US factories at the turn of the century? Why? (You may want to go back and look again at the maps.)

Answer:

Most US factories at the turn of the century would be in the Northeast and Midwest. These regions had dense railroad networks that made it easy to bring in raw materials and ship finished goods, and they also had concentrated supplies of coal, iron, and oil needed for industry.

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