Saturday
February 6, 2016

# Homework Help: science

Posted by Kiera Lisople on Monday, March 31, 2014 at 2:24pm.

1.
Use the diagram to answer question 1.
description: particles have enough energy to break free from each other and can move around freely; particles spread out in different directions
sketch:

What kind of substance is described?  (1 point)
solid
liquid
gas
molecule
2.
Note: The item below has been reviewed and is scheduled to be updated. All students will receive full credit for any response to the following.

Equal amounts of thermal energy are applied to a 100 g sample of one substance and a 200 g sample of a different substance. What statement is always true?  (1 point)
The temperature of the first substance will rise more than the temperature of the second substance.
The temperature of the first substance will rise less than the temperature of the second substance.
The temperature of the sample with the higher specific heat will rise more than the sample with the lower specific heat.
The temperature of the sample with the lower specific heat will rise more than the sample with the higher specific heat.
3.
The density of an object with a volume of 60.0 mL and a mass of 400.0 g is _____.  (1 point)
0.150 g/mL
2.89 g/mL
5.50 g/mL
6.67 g/mL
4.
Refer to the table below to answer the question.
Densities of Some Common Materials
Material
Density (g/cm3)
Air
0.0013
Gasoline
0.7
Wood (oak)
0.85
Water (ice)
0.9
Water (liquid)
1.0
Aluminum
2.7
Steel
7.8
Silver
10.5
11.3
Mercury
13.5
Gold
19.3

A 54-gram sample of an unknown material has a volume equal to 20 cm3. What is the identity of the substance?  (1 point)
steel
aluminum
mercury
5.
An ice cube, a glass of cold water, and a swimming pool are each exposed to the same amount of sunlight on a hot day. After five minutes, the ice cube is melted and the cold drink is two degrees warmer, but the temperature of the swimming pool remains unchanged. What is the best explanation for these observations?  (1 point)
The ice cube has a higher heat capacity than the glass of water and the pool.
The ice cube has a lower heat capacity than the glass of water and the pool.
The ice cube and the glass of water have higher heat capacities than the swimming pool.
The ice cube and the glass of water have lower heat capacities than the swimming pool.
6.
A banana turning brown when exposed to the air is an example of  (1 point)
a heterogeneous mixture.
vaporization.
a chemical change.
an amorphous solid.
7.
A puddle of water on the sidewalk evaporates and becomes water vapor. The water vapor travels through the air and comes into contact with a cold mirror. What happens next? Choose all that apply.  (2 points)
It becomes a solid.
It becomes a liquid.
The molecules gain energy.
The molecules lose energy.
8.
Why did a portion of the tabletop get cold when Natasha placed her cold drink on the table?  (1 point)
The table’s molecules were vibrating more slowly in that area.
The table’s molecules had gained energy in that area.
The table’s molecules had become free of each other in that area.
9.
What fact does Antoine Lavoisier’s work show?  (1 point)
The overall volume before a reaction is equal to the overall volume after a reaction.
The overall mass before a reaction is equal to the overall mass after a reaction.
The overall thermal energy before a reaction is equal to the overall thermal energy after a reaction.
The overall temperature before a reaction is equal to the overall temperature after a reaction.
10.
How do liquid water, ice, and water vapor differ from one another?  (1 point)
They are different states of matter.
They are different compounds.
They are made of different kinds of molecules.
They are made of different kinds of atoms.
11.
Use the chart to answer question 11.
Oxygen (O2)
Carbon dioxide (CO2)
Water (H2O)
contains 2 oxygen atoms per molecule
contains 2 oxygen atoms per molecule
contains 1 oxygen atom per molecule
gas at room temperature
gas at room temperature
liquid or gas at room temperature
flammable
not flammable
not flammable

A student compared some chemical and physical properties of three pure substances. Her data are recorded in the chart above. What is a logical conclusion the student can draw about pure substances?  (1 point)
Pure substances have the same chemical and physical properties.
Pure substances have the same chemical properties, but different physical properties.
Pure substances have the different chemical properties, but the same physical properties.
Pure substances have different chemical and physical properties.
12.
Carl crumpled a piece of paper before throwing it into the trash can. Which is true about the paper after it was crumpled?  (1 point)
Its weight changed.
Its mass changed.
Its form changed.
Its density changed.
Use the chart to answer question 13.
A
B
melt 1 cup of butter
brown the meat in a frying pan
chop an onion
boil 6 eggs
mix ingredients in a large bowl
bake at 350 degrees
13.
Kendra was looking at recipes in a cookbook. She divided some of the steps of a recipe into two columns. How would you label each column?  (1 point)
Column A shows sublimation; column B shows vaporization.
Column A shows vaporization; column B shows sublimation.
Column A shows physical changes; column B shows chemical changes.
Column A shows chemical changes; column B shows physical changes.
Fill in the Blank

The item below has been reviewed and is scheduled to be updated. Please insert chemical as the answer to receive full credit for this question.
14.
A property of matter describes its ability to change into different substances.  (1 point)

Use the picture to answer question 15.

15.
The individual substances of the mixture shown above are easily distinguished and easily separated. This is an example of what kind of mixture?  (1 point)

16.
The ratio of the mass of a substance to its volume is called ___.  (1 point)

17.
A ___, such as H2SO4, is a symbol that shows the elements in a compound and the ratio of atoms.  (1 point)

18.
When molecules of water vapor in the air come into contact with a cold can of soft drink, they lose energy, slow down, and form a liquid due to a decrease in ___.  (1 point)

19.
The contents of a can of air freshener are gaseous when sprayed, but remain a liquid while in the can due to ___.  (1 point)

20.
A ___ is two or more substances that are together in the same place but are not chemically combined.  (1 point)

21.
When exposed to the same amount of heat for the same amount of time, a 3 g sample of copper will experience a greater temperature change than a 12 g sample of copper due to its smaller ___.  (1 point)

22.
A property of matter that can be observed without changing the matter into a new substance is known as ______.  (1 point)

23.
A substance made of two or more elements chemically combined in a set ratio, or proportion, is called a ___.  (1 point)
• science - umm, Sunday, May 25, 2014 at 7:51pm

hey, if you could post the answers to this test if you already took it that would be amazing!

• science - rainbowgirl, Wednesday, December 10, 2014 at 11:18am

1.c/gas

• science - rainbowgirl, Wednesday, December 10, 2014 at 11:21am

3.6.67

• science - juan, Monday, February 16, 2015 at 8:56pm

• science - chris, Tuesday, February 17, 2015 at 1:54am

have you gotten the answers yet

• science - Eevee, Wednesday, February 18, 2015 at 1:38pm

i need help on the ice cube one

• science - Eevee, Wednesday, February 18, 2015 at 6:58pm

LOL this is the connections science unit test lol no probe everyone needs help :)

DUH that why I'm here lol I'm dumb!

• science - Louis, Friday, February 20, 2015 at 8:50am

• science - Angel, Monday, February 23, 2015 at 11:46am

Ill post them after im done

• science - doug , Wednesday, February 25, 2015 at 1:08pm

• science - Lexi, Thursday, February 26, 2015 at 2:15pm

I'm taking this test right now..

• science - xavier, Wednesday, March 4, 2015 at 1:26pm

are u all in connexus

• science - xavier, Wednesday, March 4, 2015 at 1:26pm

are u all in connexus if u are taking the science test i got a 100 anyone need help it was so easy!!

• science - xavier, Wednesday, March 4, 2015 at 1:30pm

the anser are from 1 to 23 are BCDACCDDCBAADDCBACDABBB
there u go good luck

• science - Iris, Thursday, March 5, 2015 at 5:15pm

Hey Xavier are the answers you said 100% correct?

• science - Eevee, Friday, March 6, 2015 at 11:12am

i need help with this one.....A student compared some chemical and physical properties of three pure substances. Her data are recorded in the chart above. What is a logical conclusion the student can draw about pure substances?

can you explain why its pure substances have both differnt chemical and physical properties...this pokemon needs it :)

• science - Anonymous, Monday, March 16, 2015 at 2:04pm

The First One Is Actually Gas...

• science - lkdfhase, Wednesday, March 18, 2015 at 1:58pm

xavier got me a 5/14

• science - Anonymous, Wednesday, March 18, 2015 at 2:31pm

• science - Bruh, Saturday, March 21, 2015 at 10:11pm

HELP PLZZZZ

• science - Anonymous, Monday, March 23, 2015 at 9:12am

I am taking this right now! LOLZ

• science - Trent, Monday, March 23, 2015 at 11:20am

Anonymous, I am too LOL

• science - KN, Tuesday, March 24, 2015 at 10:41am

• science - angela, Tuesday, March 24, 2015 at 11:22am

I dont think Xavier got the right answers........

• science - KN, Tuesday, March 24, 2015 at 11:44am

I'm taking the test right now. I think their right. I'm just checking them over.

• science - xavier, Wednesday, March 25, 2015 at 1:03pm

Haha thats what you get cheaters.... almost all of my answers are wrong @ikdfhase and @KN start studying on your own.. stop being lazy and do your own work!

• science - @\$(THE THING)\$@, Monday, March 30, 2015 at 12:13pm

• science - layla, Tuesday, March 31, 2015 at 1:12pm

• science - @zaynmalik1D, Wednesday, April 1, 2015 at 6:39pm

omfg,does anybody have all the CORRECT answers to this test?! I NEED ANSWERS!!! lol

• science - Amy, Thursday, April 2, 2015 at 7:33am

I'm just about to take a wild guess on all of these for this test !

• science - Amy, Thursday, April 2, 2015 at 8:47am

OKAY! So every time I came on here hoping to get HELP (which is what this site is for btw) I got nothing but people wanting attention and being rude. Yeah @xavier I understand your point but this site isn't for misdirection, so congrats on your 2 seconds of fame! @\$(THE THING)\$@ don't say you know the answers if you're not going to help because no one has time for petty games. I just took the test and because I wish that someone would have done this to help me on the test i'm going to share the 100% correct answers!
~ If you don't trust my answers are correct then go ahead and get a bad grade because I at least tried to help. And if that still doesn't convince you, I have the right answers and I could keep them to myself. But if you're looking on this site then that means you need help and I was in your position too. I'm not sharing these answers for me, i'm doing them for whoever isn't very good at science or doesn't pay attention.

1. C
2. B
3. D
4. C
5. D
6. C
7. 2nd & 4th
8. A
9. B
10. A
11. D
12. C
13. C

~ And for all the ones you have to fill in the blanks I haven't had my test graded yet so I'm not going to give my answers because I don't know if their accurate. But right when I get my test graded I will post the right answers for the fill in the blank.
- Here ya go. Do what you want with the answers. Use them or don't. Can't say I didn't try to help.

• science - Anonymous, Thursday, April 2, 2015 at 12:04pm

^^^^ thank you v much. I was so confused

• science - Buttercup214, Thursday, April 2, 2015 at 5:05pm

Omg thank you so much! @Amy

• science - Kate, Friday, April 3, 2015 at 12:18pm

@Amy
Hey there, I was wondering if you had the answers to the blanks? I CANNOT get ANYTHING right in science, cause I completely suck XD

• science - Anon, Friday, April 3, 2015 at 12:55pm

I would like to share my answers for the fill in the blanks. These ARE NOT proven to be correct, but I think most are good and most likely correct answers.

14. Chemical
15. Heterogenous
16. Density
17. Chem Form
18. Temperature
19. Pressure
20. Mixture
21. Mass
22. Physical Property
23. Compound

• science - Anon, Friday, April 3, 2015 at 12:55pm

Thanks Amy! THOSE ARE CORRECT.

• science - Kate, Friday, April 3, 2015 at 1:33pm

Do you know what the answers are for 24 and 25? @anon

• science - Kate, Friday, April 3, 2015 at 1:33pm

BTW: THANKS SO MUCH FOR THE ANSWERS OF 14-23! XD @Anon

• science - Amy, Monday, April 6, 2015 at 8:17am

My science teacher is still taking too long to grade my test but no shocker -.- anyways, you're welcome for the answers and for 24 and 25 I really want to wait until he grades my test to share because I don't want to give a wrong answer.

• science - Amy, Tuesday, April 14, 2015 at 7:43am

@Anon is right and 100% correct. Follow my answers and his fill-in-blanks and you are off to a good grade. For 24 & 25 I got 5/5 and 6/6 for my written responses but all I can tell you is for 24. It's a long process but I am sure you will figure it out. And 25. Change from liquid to new gases with different boiling points. It's a chemical change.

• science - Amy, Tuesday, April 14, 2015 at 8:15pm

Priceless other Amy! Thank you!! :-)

• science - Math man, Wednesday, April 29, 2015 at 8:55am

Are you guys sure these are right

• science - Anonymis Lover, Saturday, May 2, 2015 at 9:41pm

@Amy and @Anon IS CORRECT!! I JUST DID THE TEST THEY ARE ACCURATE.

• science - Nasir, Friday, May 15, 2015 at 11:03am

Thanks amy and anon your help was the best

• science - Lydia, Thursday, May 21, 2015 at 8:31am

I owe you my life xD thank you!

• science - loverboy, Saturday, May 23, 2015 at 7:54pm

@xavier u are a jerk

• science - Keema, Thursday, May 28, 2015 at 1:04pm

Omg thanks yo guys i really needed that i have least then a few days at school and i need to pass and i think that you just are awsome thanks sooo much <3

• science - Keema, Thursday, May 28, 2015 at 3:10pm

Omg thanks yo guys i really needed that i have least then a few days at school and i need to pass and i think that you just are awsome thanks sooo much <3

• science - Candy, Saturday, May 30, 2015 at 2:42pm

Thanks guys for the help I hate science and I'm so behind I needed your help! Thanks to all of your hard work if I have the right answers for something let me know!!!!

• science - Anonymous, Wednesday, October 7, 2015 at 11:34am

I think that you need to learn to do your own work !>!!!!!!!

• science - Anonymous, Wednesday, October 7, 2015 at 11:34am

I think that you need to learn to do your own work !>!!!!!!!

• science - Anonymous, Saturday, October 10, 2015 at 9:17am

Omg Thank u so much

• science - My name is jeff, Wednesday, October 14, 2015 at 1:22pm

I would just do this test on you're own, if you don't get good grades, work on it, if you just take the answers from some site, you learn nothing, the point I'm trying to make is, never cheat, it gets you no where in life, how many of you have learned from this, I bet very little (I'm talking about the ones who copied the answers). And I came to this site because I had a question on 1 question, I will not copy you're answers, because I want to get a good grade myself, if you are not doing well in science, ask for help, I'm sure you're teacher will help, ok?

• Science - Mani, Thursday, October 15, 2015 at 9:42pm

Gotchya @My name is jeff…..but um…YEAAAAHHH We are just going to be kind people and thank Anon and Amy AAAALLLOOOOT!!!!!

• science - Lyana, Tuesday, November 3, 2015 at 10:21am

True, but I think We're just going to thank them for the correct answers >.< Unfortunately, most of us go to online school, so our teachers aren't always there upon our beck and call.

• science - Ms. Sue, Monday, November 9, 2015 at 1:43pm

Thanks so much!

• science - Mattie_G, Tuesday, December 15, 2015 at 12:50pm

OMFG Thank you so much!

• science - >:(, Tuesday, January 19, 2016 at 6:16pm

>:( 9 is A not B u big dick

• science - UprisingFury, Tuesday, January 26, 2016 at 4:01pm

Questions 1-14 are correct by what Amy said and ">:(" 9 is B so idk maybe ur answers are switched

• science - AvengedFury, Tuesday, January 26, 2016 at 4:02pm

Questions 1-14 are correct by what Amy said and ">:(" 9 is B so idk maybe ur answers are switched