SCIENCE!

the second worksheet of SCIENCE! for today

performing an experiment
read the following statements and then answer the questions.
1. a scientist wants to find out why sea water freezes at a lower temperature than fresh water.
2. the scientist goes to the library and reads a number of articles about the physical properties of solutions.
3. the scientist also reads about the composition of sea water.
4. the scientist travels to a nearby beach and observes the conditions there. the scientist notes that taste of the sea water and other factors such as waves, wind, air pressure, temperature, and humidity.
5. after considering all this information, the scientist sits at a desk and writes, "if sea water has salt in it, it will freeze at a lower temperature than fresh water.
6. the scientist goes back to the laboratory and does the following:
a. fills each of two beakers with 1 liter of fresh water.
b dissolves 35 grams of table salt in one of the beakers.
c.places both beakers in a freezer at a temperature of -1 C.
d. leaves the breakers in the freezer for 24 hours.
7. after 24 hours, the scientist examines both breakers and find the fresh water to be frozen. the salt water is still liquid.
8. the scientist writes in a notebook, "it appears that salt water freezes at a lower temperature than fresh water does."
. the scientist continues, "i suggest that the reason salt water freezes at a lower temperature is that sea water contains dissolved salts, while fresh water does not."

questions

a. which statement(s) contain conclusions?

b. which statement(s) contains a hypothesis?

c. which statement(s) contain observations?

d. which statement(s) describe an experiment?

e. in which statement is the problem described?

f. which statement(s) contain data?

g. which is the manipulated variable in the experiment?

h. what is the responding variable in the experiment?

okay so this is the worksheet, and i think i have submit the other worksheet too early, butt i will also be answering these questions in an hour, so if you could also explain or tell me what i need to know for this, then thank you very much tutors !

  1. 0
  2. 0
  3. 72
asked by anon
  1. We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.

    However, here is some help:


    An independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable.

    A dependent variable is the response or measure of results.

    1. 0
    2. 0
    posted by PsyDAG
  2. that's why i said i will be posting the answers in an hour, butt i didn't get a chance to. sorry about that psydag. thanks for the help.

    please check the following (and add statements if needed):

    a. which statement(s) contain conclusions?
    i think the ninth statement.

    b. which statement(s) contains a hypothesis?
    i think the fifth statement.

    c. which statement(s) contain observations?
    i think the seventh, the fourth, and the eighth statements.

    d. which statement(s) describe an experiment ?
    i think the sixth statement.

    e. in which statement is the problem described ?
    i think the first statement.

    f. which statement(s) contain data?
    i think the second third
    i think the second and third statements.

    g. which is the manipulated variable in the experiment?
    i think the manipulated variable is the beaker that has salt in it.

    h. what is the responding variable in the experiment?
    i think the responding variable is which beaker or water that freezes the first.

    tank you very much tutors.

    1. 0
    2. 0
    posted by anon
  3. help somone i need to get a 100

    1. 0
    2. 0
    posted by lyma
  4. Which statement(s) contain conclusions ?

    1. 0
    2. 0
    posted by Anonymous

Respond to this Question

First Name

Your Response

Similar Questions

  1. SCIENCE!

    last worksheet for SCIENCE! for today analyzing elements of a scientific method read the following statements and then answer the questions. 1. you and your friend are walking along a each in maine on january 15, at 8:00 am. 2.

    asked by anon on August 30, 2015
  2. Science

    Trying to be sure that procedure directions for performing my experiment are correct! I'm on step by step experimental procedure for what dogs foods and/or treats does my dog like the best? this is very hard for me to put in to an

    asked by 6th Grade School Science Expo Timeline on October 7, 2009
  3. AED

    List the equipment and materials to be included in the science kit. o Explain what safety precautions are needed. Wear goggles, wear apron, wear gloves, and I am stuck there. o Outline the step-by-step procedures for the

    asked by troyer0269 on November 30, 2008
  4. SCIENCE

    I have to find research about Jan van Helmont's work on Spontaneous Generation and I am having trouble finding info. about it and how he conducted the experiment..also i have to figure out the strengths and weaknesses of the

    asked by Amanda on May 24, 2008
  5. Chemistry

    In the experiment of Nucleophilic substitution reactions: Competing Nucleophiles 1)what would happen if all the solids in the nucleophile medium were not dissolved? How might this affect the outcome of the experiment? 2)Explain

    asked by Jennifer on February 17, 2010
  6. science

    I have a science experiment and I'm not sure how to do this or have all the materials to do it can anyone help? For this portfolio, you will design an experiment to investigate the relationship between the number of coil loops and

    asked by Amber on April 3, 2015
  7. General Education

    Only circus animals with a clean bill of health will perform in today’s exhibition. A monkey, a poodle, and a horse will perform in today’s exhibition. No circus animals with a clean bill of health were prescribed medications

    asked by Tiffany on July 20, 2014
  8. Math

    Sam and his father are talking: Son how many pages are there in that book you have to read for school? Less than 1000. Have you started reading it yet? Yes, on Sunday I already passed page 150. And how many pages did you read

    asked by Elsie on October 15, 2009
  9. General

    This is a question to everybody: I was just wondering if anyone had any science related questions or things they wonder about that may require experiments. If you have any ideas please mention them. I need this for a science for a

    asked by Samantha on September 6, 2012
  10. English

    My daughter has a worksheet due tomorrow and is stressing because she read the book Dragonwings and didn't get it at all and doesn't get the worksheet and i cant read it and help her,please help 1)Why doesn't Moon Shadow attend

    asked by Abigail on December 9, 2014

More Similar Questions