FREE AND STUDY GAMES ABOUT 8TH SCIENCE EDGEN---

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FREE AND STUDY GAMES ABOUT 8TH SCIENCE EDGEN---

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -20 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: What is occurring when two waves traveling along the same medium meet and cancel each other out?

Answer:

destructive interference Question 2: Henri draws a wave that has a 4 cm distance between the midpoint and the trough.Geri draws a wave that has an 8 cm vertical distance from the trough to the crest. Which best describes the energy in Henri and Geri's waves?

Answer:

Henri's wave and Geri's wave have the same amplitude, but Geri's has more energy.

Question 3: Sound Waves are produced when something does what?

Answer:

vibrate

Question 4: What do digital signals turn sounds into?

Answer:

zeros and ones

Question 5: Which types of waves requires matter to carry energy?

Answer:

mechanical waves only Question 6: Sound Wave A is moving through a medium wave that is decreasing in temperature.Sound Wave B is moving from a liquid to a gas medium. What statement can be made about both waves

Answer:

They will slow down Question 7: What will occur when the trough of Wave A overlaps the crest of Wave B?

Answer:

Destructive interference will occur, causing the new wave to have less energy than Wave A or Wave B

Question 8: Describe how sound waves are produced and how they travel.

Answer:

Medium Question 9: What best describes what occurs when an object takes in a wave as the wave hits it.

Answer:

absorption Question 10: Which best describes the order of the technology used to transmit a sound through the radio?

Answer:

microphone -> transmitter -> raidio

Question 11: What do diffraction and refraction have in common?

Answer:

They both involve waves interactions

Question 12: Identify the features of a sound wave.

Answer:

Wave A has a higher amplitude than Wave B

Question 13: The frequency of a wave does not change as it passes from one medium to another. What will most likely happen if a light wave moves from the air into a solid?

Answer:

The speed of the light wave will decrease Question 14: What statement can most likely be made about the shock waves of atomic bombs?

Answer:

They are a mechanical waves

Question 15: Which two animals use echolocation?

Answer:

bats and dolphins

Question 16: Which equation should be used to calculate the speed of a wave?

Answer:

speed = frequency x wavelength Question 17: What refers to the number of wavelengths that pass a fixed point in a second?

Answer:

frequency

Question 18: How does waves carry energy?

Answer:

Energy moves from one place to another through the wave

Question 19: What is an example of a transverse wave?

Answer:

a crowd doing the wave at a sporting event.Question 20: An ultrasound tech is trying to identify an object, but the screen of the machine is broken. Which statement best describes this situation

Answer:

The machine will not be able to process the received echoes into images.