Monday
February 20, 2017

# Homework Help: Science

Posted by anonymous on Wednesday, October 30, 2013 at 5:30pm.

1.
Why do scientists use models of natural systems? (1 point)

Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly.
Scientists use models of natural systems because they like to use art in science.
Scientists use models of natural systems because the models are more accurate than the actual system.
Scientists use models of natural systems because models work exactly the way these systems do in nature.

2.
A scientist is studying a new chemical he hopes will prevent insects from eating raspberry bushes. He sprays the chemical on a raspberry bush and places it with an unsprayed blackberry bush and some insects in a sealed room. He observes insects eating the blackberry bush, but not the raspberry bush. He concludes that the chemical works. This situation is an example of (1 point)

a controlled experiment.
experimental bias.
cultural bias.
skepticism.

3.
Why do scientists use the International System of Units (SI)? (1 point)

because the SI is based on the metric system
because the tools scientists use only measure in SI units
so they can communicate their results without confusion
so all scientists are guaranteed to come up with the same measurements

4.
What should you do if there is an accident while you are doing a scientific investigation? (1 point)

Go to the hospital.
Wait a few minutes to see if you are hurt or there is any damage to your work station.
Call 911.
Tell an adult immediately and follow his or her directions as quickly as possible.

7.
A student measures a rectangular room to be 20.0 m × 17.16 m. Which of the numbers below represents the room’s area with the correct number of significant figures? (1 point)

340 m2
343 m2
343.2 m2
343.20 m2

8.
A student measures the mass of a paper clip. The student’s data table is shown below. The accepted value for the paper clip’s mass is 1.14 g.
Trial # Mass
1 2.45 g
2 2.40 g
3 2.42 g

Which of the following best describes the student’s measurements? (1 point)

The student’s measurements were accurate, but not precise.
The student’s measurements were precise, but not accurate.
The student’s measurements were neither accurate nor precise.
The student’s measurements were both accurate and precise.

9.
Which component of the technological system is achieved when an automobile airbag inflates? (1 point)

input
feedback
process
output

11.

Knowing the main ideas ahead of time helps you know where to focus your attention.
Surveying ahead of time means you can skip maps, diagrams, and content summaries later.

12.
An advertisement claims that three out of five dentists prefer a particular type of toothpaste. After researching the study, you find that the toothpaste company paid for it. Why should you be skeptical of the advertisement’s claims? (1 point)

because the dentists are showing experimental bias
because only dentists were involved in the study
because the organization that paid for the study is biased
because you do not like the toothpaste being advertised

13.
If a bowling ball were moved from Earth to the moon, how would its weight and mass change? (1 point)

The bowling ball would weigh the same, but its mass would increase.
The bowling ball would weigh the same, but its mass would decrease.
The bowling ball would weigh less on the moon, but its mass would stay the same.
The bowling ball would weigh more on the moon, but its mass would stay the same.

14.
A student hypothesizes that a goldfish will be more active in a bowl that has red gravel than in a bowl with grey gravel. To test this hypothesis, the student places one goldfish in a bowl with red gravel and another goldfish in a bowl with grey gravel. The color of the gravel is the _______________ variable in the experiment. (1 point)

control
responding
dependent
independent

15.
A scientist goes to a large international conference and hears about a new discovery. The scientist is very excited about these new findings and decides to verify the other scientists’ results by conducting her own investigations. The scientist is being open-minded but __________________. (1 point)

16.
A scientist observes chimps putting dry leaves into a hole in the tree. The leaves come out wet and the chimps lick the water off of the leaves. The scientist reasons that there is water inside the tree. This reasoning is called a(n) ________________. (1 point)

17.
Contact lenses improve lives. Contact lenses are an example of a(n) ________________. (1 point)

18.
Explain what science is. Give an example of a type of scientist and what they study. (3 points)

19.
Explain the difference between a scientific theory and a scientific law. (3 points)

20.
Using an example, explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life. (3 points)

1.a
2.b
3.c
4.d
7.d?
8.b
9.b
11.a
12.c
13.c
14.d
15.cautious or skeptical?
16.inference?
17.?
18.
19.
20.

• Science - hannah, Monday, September 15, 2014 at 2:12pm

did you get them all right ?

• Science - Anonymous, Tuesday, October 14, 2014 at 1:02pm

were they right

• Science - answer plz, Tuesday, September 15, 2015 at 2:21pm

well were they right or what?

• Science - answer plz, Tuesday, September 15, 2015 at 2:34pm

and btw 7 was C

• Science - Anonymous, Wednesday, September 16, 2015 at 11:11am

the capital ks are in the second row, 12 from the left, the eighth row,32 from the left, and the second from bottom row 14 from the left

• Science - Daisy, Tuesday, September 22, 2015 at 5:32pm

did you get them right?

• Science - Olii, Friday, September 25, 2015 at 7:47pm

Are you sure you answered al of them correctly (is the person who made the question doesn't answer, then can someone who had taken the test and got the results tell me if this is helpful??) PLZZZZ REPLY FAST!

• Science - Aasiyaa, Wednesday, September 30, 2015 at 10:26am

7 , 9 , & 14 is wrong 😒 ' I just took the test !! (( 7 is B " 343m^2 " , 9 is D " output " , & 14 is D " Independent "

• Science - 31, Wednesday, September 30, 2015 at 11:31am

• Science - 31, Wednesday, September 30, 2015 at 11:58am

1.a
2.b
3.c
4.d
5.c
6.d
7.b
8.c
9.d
10.c
11.a
12.c
13.c
14.d
15. skeptical
16. inference
17. invention or technology both are correct

i just took this and got 100%

• Science - Ms. Sue, Wednesday, September 30, 2015 at 1:24pm

Yes, 31. Those are correct.

• Science - Anonymous, Thursday, October 1, 2015 at 2:20pm

8 is B

• Science - Revan, Monday, October 5, 2015 at 12:02pm

hes right. 8 is B

• Science - Mrs.Sue, Tuesday, October 6, 2015 at 6:34pm

1.A
2.B
3.C
4.D
5.C
6.D
7.B
8.B
9.D
10.C
11.A
12.C
13.C
14.D
15. Skeptical
16. inference
17. invention or technology

Got 100%

• Science - Wasup, Monday, October 12, 2015 at 9:11pm

Mrs. Sue is correct got 100%

• Science - jakson, Tuesday, October 13, 2015 at 4:59pm

mrs. sue is right got 100%

• Science - Mr.Smart, Wednesday, October 21, 2015 at 7:55pm

1.A
2.B
3.C
4.D
5.C
6.D
7.B
8.B
9.D
10.C
11.A
12.C
13.C
14.D
15.Skeptical
16.Inference
17. invention or technology

• Science - You suck, Wednesday, September 7, 2016 at 1:19pm

I got 10/16 because the answers are wrong!!

• Science - BK, Wednesday, September 7, 2016 at 1:44pm

Does anyone know if those answers are correct?

• Science - a, Wednesday, September 7, 2016 at 1:55pm

ill check

• Science - a, Wednesday, September 7, 2016 at 2:05pm

1.a
2.b
3.c
4.d
5.d
6. b
7.b
8.d
9. c
10.a
11. c
12. c
13.d
14. skeptical
15. inference
16. invention or technology
I just took the test

• Science - INCA student, Wednesday, September 7, 2016 at 7:29pm

@a are you an INCA student?

• Science - Course, Friday, September 9, 2016 at 1:19pm

• Science - Maria, Monday, September 12, 2016 at 1:43pm

1.a
2.b
3.c
4.d
5.d
6.b
7.b
8.d
9.c
10.a
11.c
12.c
13.d
14.Skeptical
15.inference
16.invention or technology
write the rest, they are super easy. I just did the test

• Science - sam, Tuesday, September 27, 2016 at 12:44pm

is maria right?

• Science - helpmeh, Wednesday, September 28, 2016 at 10:04am

Maria is right

• Science - YunoGasai, Thursday, September 29, 2016 at 7:09pm

maria is right <3

• Science - Anonymous, Monday, October 10, 2016 at 3:42pm

mrs sue is wrong he didn't get 100% because some of them are wrong.

• Science - Kailyn, Wednesday, February 15, 2017 at 10:11am

I mean just look at INCA dude his/her answers are right! Everyone else just copied