Question

help metal and fan!!!!!

Answer 1

1. [02.01]

What are the characteristics of low energy waves?

long wavelengths and low frequencies
short wavelengths and high frequencies
high frequencies and long wavelengths
low frequencies and long wavelengths
2. [02.01]

______________ are low energy waves found in the electromagnetic spectrum and ______________ are high energy waves found in the electromagnetic spectrum.

Gamma rays; radio waves
Microwaves; X-rays
Visible light; microwaves
Ultraviolet rays; radio waves
3. [02.01]

Waves that make up the visible part of the electromagnetic spectrum have

lower energy than X-rays.
lower energy than microwaves.
higher energy than gamma rays.
higher energy than ultraviolet light.
4. [02.04]

If you sit outside and get a sunburn, what type of electromagnetic waves are to blame?

X-rays
microwaves
infrared light
ultraviolet light
5. [02.04]

When a sound source is moving toward the observer, the observer will hear a higher pitch. This is due to

a decrease in the amplitude of the sound wave.
a decrease in the frequency of the sound wave.
an increase in the frequency of the sound wave.
an increase in the amplitude of the sound wave.
6. [02.04]

Sam is walking through the park. He hears a police car siren moving on the street coming toward him. What happens to the siren sound as it approaches and then passes Sam?

As the siren approaches Sam, the frequency of sound waves from the siren increase. As the police car continues past Sam, the sound waves decrease in frequency.
As the police car approaches Sam, sound waves from the siren remain constant. As the car continues past Sam, the sound waves decrease in frequency.
As the police car approaches Sam, the frequency of sound waves from the siren decrease. As the car continues past Sam, the sound waves increase in frequency.
As the police car approaches Sam, the frequency of the sounds waves from the siren increases and continues to increase as the car passes and moves away from Sam.
7. [02.04]

An observer notes that the pitch of a sound is becoming progressively lower. The observer can conclude that the sound is moving

away and the frequency of the sound wave is increasing.
away and the frequency of the sound wave is decreasing.
closer and the frequency of the sound wave is decreasing.
closer and the frequency of the sound wave is increasing.
8. [02.04]

How does light travel?

Light only travels in a vacuum and travels faster when the sound source is moving.
Light only travels in a medium and light travels faster when a sound source is stationary.
Light can only travel in a vacuum and the speed varies depending on whether the source is moving or stationary.
Light can travel in the air or a vacuum and the speed is constant whether the light source is stationary or moving.
9. [02.04]

Select the statement that correctly describes how light travels.

Light travels at different speeds when the light source is moving and cannot travel in a vacuum.
Light cannot travel through a vacuum and travels slower when the light source is moving away.
Light can travel in a vacuum, and the speed at which it travels changes if the source is moving.
Light travels at a constant speed through a vacuum, even if the light source is moving.
10. [02.05]

Which statement best describes scientific laws?

Scientific laws are facts that describe natural events.
Scientific laws are theories that have been proven to be true.
Scientific laws are based on opinions and testing.
Scientific laws are the result of scientific explanations of ideas.
11. [02.05]

Select the statement that is true regarding scientific theories.

Scientific theories are what laws are called before they are proven.
Scientific theories attempt to explain why natural events occur.
Scientific theories are based on facts.
Scientific theories describe natural events.
12. [02.05]

In order to be considered science, a body of knowledge must be

questionable and testable.
obvious and factual.
testable and obvious.
testable and observable.
13. [02.05]

Which of the following could be considered a scientific statement?

Mark has the best smile in class.
Nancy is the tallest person in the class.
Blue is the best color.
Desha is the funniest person in class.
14. [02.05]

Which question can be answered using the scientific method?

Which type of dog food has more calories per serving: National, Dog's Best, or Good Chow?
What color is the most attractive: red, blue, green, or yellow?
Which type of pie is the best: cherry, apple, or blueberry?
Which flower smells best: a rose, carnation, or tulip?
15. [02.05]

Which statement is the best example of pseudoscience?

Scientists have observed many constellations in our universe.
Mary thinks her astrological sign, Leo, is a perfect fit for her personality.
Satellites found in space record images of events that take place on the Earth.
The employees at the observatory use telescopes to study the stars.
16. [02.05]

You are writing a science report and want to find accurate trustworthy information. Which would be the best resource?

an encyclopedia
a magazine article
the science club's website
a newspaper
17. [02.05]

The city council is discussing whether or not to put fluoride in the city's water supply. Many other towns add it already, but your town wants to research the topic before they make a decision. Which would be the best group for them to ask for information on the topic?

citizens from the town who are interested in the topic
the company that supplies the fluoride
the government agency responsible for monitoring water safety
citizens from another town that currently add fluoride to their water
18. [02.05]

The state is thinking about building a dam. They hire a team of biologists and environmental scientists to study the impact of the dam on the local wildlife. Which statement best explains how this study will be useful to the state?

The state will be able to weigh the benefits against the negative impact that the project might have in order to decide if it is safe to build the dam.
A local fishermen's club is against the project. This study will prove that there will be no impact on fish populations.
Environmentalists will be opposed to the project. The study will prove the dam should be built, and the environmentalists will have to consent.
The state will be able to save money on the construction of the dam since they will have more information about the area.
19. [02.05]

An environmental group wants to sink a ship off the coast to create an artificial reef. They find that they must get a permit from the Environmental Protection Agency in order to be allowed to do this. Which statement best describes why a permit would be required?

The environmental protection agency does not trust the environmentalists.
The environmental protection agency is trying to make money by selling the permits.
The environmental protection agency needs to inspect the ship and make sure it is safe before giving the ok.
The environmental protection agency uses permits to control the actions and beliefs of some environmental groups.

Answer 2

@redred413
@jordanloveangel
@-StudyShark-
@misswinzeyyy
@leonardo0430

Answer 3

ill hellp u but it will take a few mins and my os is kindah frozen

Answer 4

lol why are you taking this class if you're not interested in doing any of the work

Answer 5

because I have to take this class.. -_-

Answer 6

i think it would help if you say medal instead of metal in the vary top

Answer 7

very*....

Answer 8

this is the dude you want: @Gabebro13

i suck at everything except history and english xDDD

Answer 9

oh and @bibby

Answer 10

no thank you

Answer 11

-.- DUDE PLS

Answer 12

she needs help and you know u know this stuff xD

Answer 13

I don't know physics and I don't do tests for people

Answer 14

i already got it... thanks tho @misswinzeyyy

Answer 15

sorry i couldnt help ;-;

Answer 16

1. A
2. Not sure
3. B
4. D (this one I know because I grew up in Miami and had it drilled in my head)
5. Not sure, but I think it's C.
6. Pretty sure it's A.

And I got bored of reading the rest.

Sorry it took me so long to reply @misswinzeyyy Maybe next time I'll get here faster.

And you shouldn't have someone do your entire exam @vita955