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- 1. Multiple Choice
Why are scientists most likely working on developing cleaner-burning fuel for cars?
to increase fuel consumption
to increase fuel production
to reduce noise pollution
to reduce air pollution
- 2. Multiple Choice
Which is the most likely reason why scientists change a model?
The public wants to understand a concept more easily.
Students need illustrated models in a study guide.
New discoveries makes the current model inaccurate.
Current models may be uninteresting.
- 3. Multiple Choice
Which scientific tool helps to make distant objects appear nearer and larger?
a microscope
a telescope
a telescope
an ultrasound
- 4. Multiple Choice
Which best blocks X-ray particles and can therefore be observed more closely through the use of this technology?
organs
muscles
fluids
bones
- 5. Multiple Choice
Which observation tool allows Shauna’s doctor to monitor her blood circulation in real-time?
a microscope
a telescope
an X-ray
an ultrasound
- 6. Multiple Choice
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?
to determine whether human exploration of Mars is possible
to develop better X-ray technology
to find evidence of once-living Martian microorganisms
o investigate evidence of hydrogen and water
- 7. Multiple Choice
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?
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?
Scientists started using electron microscopes instead.
Scientific telescopes were already using advanced technology.
Scientific ideas often have to wait until advancements in technology make the ideas possible.
Scientists often feel their ideas place an unnecessary burden on the research to develop telescopes.
- 8. Multiple Choice
Which elements do hydrogen fuel cells combine to produce electricity?
hydrogen and oxygen
hydrogen and carbon
hydrogen, oxygen, and nitrogen
hydrogen, carbon, and nitrogen
- 9. Multiple Choice
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?
on racetracks
in real-world conditions
in flooded environments
on closed courses
- 10. Multiple Choice
Cars powered by hydrogen fuel cells emit which substance?
oxygen
carbon dioxide
hydrogen
water
- 11. Multiple Choice
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?
to produce more water
to improve fueling stations
to move more cargo
to reduce harmful emissions
- 12. Multiple Choice
For which group of people might brain-powered cars allow the greatest increase in mobility?
children or young adults
people with physical disabilities
highly educated people
wealthy business people
- 13. Multiple Choice
Mia uses the formula πr2 to find the area of a circle. What is πr2 an example of?
a robot
a car
a telescope
a model
- 14. Multiple Choice
Which model is most likely used to show something that happens too slowly to see?
a model of a weather system
a model of mountain formation
a model of the area of a circle
a model of an architectural building
- 15. Multiple Choice
Which best describes the current model of the atom?
It is similar to the model of the solar system with orbiting planets.
It has remained the same for several centuries.
It is similar to the model of plum pudding with suspended plums.
It may be revised with increasing scientific knowledge.
- 16. Multiple Choice
Advancements in which field have increased the ability to store increasing amounts of data on electronic devices?
social skills
driving skills
technology
biology
- 17. Multiple Choice
Students are studying the changing concentration of carbon dioxide levels in different substances. They insert sensors into each substance and allow a device to graph the results.
What are the students most likely using?
thermometers
microscopes
probeware
- 18. Multiple Choice
Which is one reason why hydrogen is considered a better fuel source for cars?
It is nonrenewable.
It produces carbon dioxide.
It emits no harmful emissions
It combines with water to produce electricity.
- 19. Multiple Choice
Which model is most likely used to predict a future event?
a model of a cell
a model of Mars
a model of weather systems
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