AnswersFL-2003010-MJ Physical ScienceTools and Technology

Tools and Technology Answers

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The Port of Houston is one of the busiest ports in the country. The U.S. Department of Energy gave this port $3.4 million to operate twenty heavy-duty hydrogen hybrid fuel cell powered trucks around the port.Which is the most likely reason the U.S. government made such an investment?

A
to produce more water
B
to improve fueling stations
C
to move more cargo
D
to reduce harmful emissions
2
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Rudri studies for her physical science test on the history of the atomic model. She creates a table to show how the atomic model has changed over time. Which represents the correct order of development for the atomic model?

Question illustration
A
W→X→Y→Z
B
Y→X→Z→W
C
X→Y→W→Z
D
X→Z→W→Y
3

Mia uses the formula πr2 to find the area of a circle. What is πr2 an example of?

A
a robot
B
a car
C
a telescope
D
a model
4

Which observation tool allows Shauna’s doctor to monitor her blood circulation in real-time?

A
a microscope
B
a telescope
C
an X-ray
D
an ultrasound
5

For which group of people might brain-powered cars allow the greatest increase in mobility?

A
children or young adults
B
people with physical disabilities
C
highly educated people
D
wealthy business people
6

Which best describes the current model of the atom?

A
It is similar to the model of the solar system with orbiting planets.
B
It has remained the same for several centuries.
C
It is similar to the model of plum pudding with suspended plums.
D
It may be revised with increasing scientific knowledge.
7

When people look through a telescope, air currents in the Earth’s atmosphere can distort the images they see. In the 1950s, a scientist named H. W. Babcock thought of a way to reduce this distortion by using a special device within the telescope. However, this device was not used until the 1990s.Which best explains why Babcock’s idea took many years to become a reality?

A
Scientists started using electron microscopes instead.
B
Scientific telescopes were already using advanced technology.
C
Scientific ideas often have to wait until advancements in technology make the ideas possible.
D
Scientists often feel their ideas place an unnecessary burden on the research to develop telescopes.
8

The public is not yet able to purchase cars powered by hydrogen fuel cells because engineers have to determine how the cars perform based on which scenario?

A
on racetracks
B
in real-world conditions
C
in flooded environments
D
on closed courses
9

Which model is most likely used to show something that happens too slowly to see?

A
a model of a weather system
B
a model of mountain formation
C
a model of the area of a circle
D
a model of an architectural building
10

The robotic rover Curiosity has instruments that detect radiation both inside the spacecraft and in the Mars environment. What is most likely the purpose of this radiation detection?

A
to determine whether human exploration of Mars is possible
B
to develop better X-ray technology
C
to find evidence of once-living Martian microorganisms
D
to investigate evidence of hydrogen and water
11

Which elements do hydrogen fuel cells combine to produce electricity?

A
hydrogen and oxygen
B
hydrogen and carbon
C
hydrogen, oxygen, and nitrogen
D
hydrogen, carbon, and nitrogen
12

Which scientific tool helps to make distant objects appear nearer and larger?

A
a microscope
B
a telescope
C
probeware
D
an ultrasound
13

View the model of the United States. Which is a likely limitation of this model?

Question illustration
A
It does not show which countries are to the north and south.
B
It does not show America’s major rivers.
C
It does not show mountainous regions.
D
It does not show the oceans surrounding America.
14

Cars powered by hydrogen fuel cells emit which substance?

A
oxygen
B
carbon dioxide
C
hydrogen
D
water
15

View the model of the rover Curiosity. Which classification best applies to this model?

Question illustration
A
very large
B
very small
C
very mathematical
D
very complex
16

Which best blocks X-ray particles and can therefore be observed more closely through the use of this technology?

A
organs
B
muscles
C
fluids
D
bones

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