Unit 1 test

1. Unit 1 test Scientific Method, Variables, Tools, EDP, Adaptive/Assistive, and Intended/Unintended

2. What is the purpose of using Scientific methods? • To think of a question about the world • To follow steps in order • To answer questions and solve problems • To make careful observations

3. After making a hypothesis, a scientist must • A. analyze results • B. test it with experiments • C. share it with other scientists • Draw conclusions

4. A student pulls on a rubber band with both hands and releases it. The rubber band travels across the room. The student repeats this procedure several times. Which tool should the student use to measure the distance traveled by the rubber band?

5. A student designs an experiment to determine how surface type affects the amount of force neede to roll a ball 20 meters. What is the INDEPENDENT variable? • A. lengths of the surfaces • B. the force needed to roll the ball • C. the type of surfaces used • D. the type of ball chosen

6. Students want to determine which type of plant will best survive in a hot, dry environment. They place 4 different types of plants in identical pots and put all plants by the same large window. They give each plant the same amount of water each day. What is the INDEPENDENT variable? • A. amount of water • B. health of plant • C. type of plant • D amount of sunlight

8. Students are to build a model bridge using toothpicks and would glue. The design of the bridge must support a specific amount of weight and measure 20 cm long. Which tools would BEST help determine if the model bridge meets the design requirements? • A. rulers, weights, and string • B. string, beaker, water • C. hammer, string, and nails • D. pliers, saw and string

9. What is the relationship between science and engineering? • A. Engineering uses scientific knowledge to develop technology • B. Engineering does not use scientific methods. • C. Science uses cost-benefit analysis to test a hypothesis • D. Science uses the EDP to prove scientific theories

10. Which of these BEST describes why an artificial arm is considered an ASSISTIVE engineered product? • A. it is an adaptation of an earlier technology • B. it helps a person with a disability to overcome a handicap • C. it resembles a human body part • D. It causes a permanent change to an organism.

11. Which BEST explains an example of ADAPTIVE engineering? • Automobile tires made from recycled material because resources are conserved • Walking canes made from lightweight aluminum, because mobility is increased • Hearing aids worn in the ear canal because a disability is overcome • Vision corrected by laser surgery because a permanent change is made

12. The main biofuel on the market today is ethanol, a fuel made from corn? Which type of bioengineered product is ethanol? • Adaptive • Assistive • Resistant • Manipulated

13. Ethanol, often produced from corn, is being added to gasoline in an attempt to reduce the amount of fossil fuel usage. Which is an UNINTENDED consequence of ethanol use? • Cost of corn products increases • Improvement in gas mileage • Conservation of fossil fuels • Improved health of the environment

14. A technology company has identified the need for smaller, longer-lasting batteried to use in hybrid vehicles. What would be the FIRST step engineers would take to design and produce an improved battery? • Test the new battery • Reshape the existing battery • Research current battery technology • Build a prototype battery

15. What is an UNINTENDED consequence of technology? • A negative result of an engineering design • Results or uses of technology not part of the engineering design • A positive purpose for which technology is used • Results or uses of technology that are part of the engineering design

16. Almost half of the electricity generated in the US comes from burning coal. Which statement explains the most likely INTENDED benefit for using coal as a source of electricity? • Coal is a resource that occurs naturally on Earth. • Coal is plentiful an inexpensive compared to other power sources. • Some types of coal mining cause harm to the environment. • Burning coal releases gases into the air that leads to acid rain.

17. A student is to determine how much salt dissolves in 59 mL of water. Which tool is BEST for measuring the volume of water to be used? • 100 ml graduated cylinder • Thermometer • Spring scale • 25 ml beaker

18. An emergency equipment company makes warning signal flares. The company wants to redesign a flare so that it produces light for a longer period of time. After the company thinks of ideas, what is the BEST choice for the next step in the EDP? • Build a prototype • Improve the product • Decide on the best improvement • Define the problem

19. Which of the following is an example of adaptive bioengineering? • Eyeglasses • Hearing aid • Crutch • Cochlear implant

20. Which tool measures force?

21. Which tool measures volume?

22. Which tool measures mass?

23. Which tool measures temperature?

24. Which tool measures time?

25. The basic SI unit of length is the _________________

26. A measure of how much surface an object as is _________

27. The amount of matter in a given volume is ____________

28. The amount of space that something takes up is __________

29. The amount of matter that makes up an object is _________.