Quiz

1. What do both scientists and engineers do? Select all that apply.

• use models

• use creativity 

• work in groups

• build prototypes

1. Engineers test a model for a new iPad screen and find that the prototype breaks easily when dropped. The engineers should view the model as

• a model that provides lessons that can help them succeed with another approach.

• a model that can be used to promote the product.

• a failure that should be forgotten.

• a model to be copied for other types of phones.

It is important to include titles and labels on graphs. Why do you think so?

• to eliminate signs of experimental error

• . to convince others that your data is reliable

• to show that your hypothesis has been supported

• to indicate what data is being illustrated

1. Mechanical waves can be produced in a variety of ways. Identify the possible scenarios that would produce transverse waves. Select all that apply.

• plucking a guitar string

• doing the wave in sporting arena

• throwing a stone across the surface of a pond

• rapid heating of air by lightning

• striking a tuning fork

Why is it necessary for engineers to test a prototype before launching the final product?

• To ensure the product is perfect and has no flaws

• To increase the cost of production

• To delay the launch of the product

• To make the product look attractive

What is the significance of a failed prototype in the engineering design process?

• It indicates that the engineers are incompetent

• It provides lessons that can help in refining the design

• It is a waste of time and resources

• It has no significance

Why is it important to accurately represent data on graphs?

• To make the graph look colorful and attractive

• To ensure the data is understood correctly

• To confuse the audience

• To make the graph look complicated

Instruments vibrate, similar to the diaphragm in the speaker.

• true

• false

This is a kind of energy that is produced when vibrations travel through the medium.

• sound

• light

• electrical

• potential

A bottle is filled with water of different amounts. Which bottle will produce sound that has a lowest pitch?

• 200mL

• 50 mL

• 1000mL

• 300 mL

Answer explanation

More water means less air and less vibration resulting in a lower frequency thus a lower pitch.