Science

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Under which of the following conditions would a fossil most likely form?

a. a living thing dies and sediment is very slowly deposited on top of its body
b. a living thing dies and sediment quickly covers its body*
c. a living thing dies and its skeleton is left exposed to the elements
d. a living thing dies and a radioactive element breaks down its body

Radioactive decay occurs when atoms:

a. lose mass*
b. join with atoms of another element
c. break down to form atoms of another element
d. are exposed to chemical weathering

Which of the following events occurred in the Mesozoic era?

a. dinosaurs became common on land*
b. whales and dolphins evolved in the oceans
c. flowering plants flourished
d. the supercontinent Pangaea formed

  • Science -

    #1
    http://www.enchantedlearning.com/subjects/dinosaurs/dinofossils/Fossilhow.html

    #2 is c.

    #3.
    http://en.wikipedia.org/wiki/Mesozoic

  • Science -

    1. d

    3. c

  • Science -

    #1 isn't right. The site I gave you spells it out in plain English.

  • Science -

    C?

  • Science -

    Now you're guessing.

  • Science -

    The site says that "some animals were quickly buried after their death," which matches my original answer, b.

  • Science -

    Did you look at this site. I can't believe you did and didn't see this.
    Here is the introduction to the summary.
    Fossils of hard mineral parts (like bones and teeth) were formed as follows:
    Now read the first sentence after that.

  • Science -

    The only original answer I saw was/is
    1.d
    3.c
    If you had b initially I didn't notice.

  • Science -

    OK, now I get it. What is more helpful than the intro is the flow chart which gives the conditions which must exist.

  • Science -

    I have an asterisk next to b in the first question.

  • Science -

    Now I see the asterisk. Sorry I didn't see it initially.

  • Science -

    OK, to summarize:

    1. B
    2. C
    3. C

    Thank you so much for help!

  • Science -

    so what else?????

  • Science -

    answers 1-10

    B
    A
    A
    B
    C
    A
    D
    B
    A
    C

  • Science -

    Wait.. I though for q. 1 it is A...

  • Science -

    NOBODY LISTEN TO THE GIRL NO ONE KNOWS THEY ARE WRONG I CHECKED

  • Science -

    thanks for telling us

  • Science -

    stop posting incorrect answers
    correct answers:
    b
    a
    a
    b
    c
    a
    a
    c
    a
    c
    c
    b
    true/a
    true/a

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