I'm kinda in a rush but take your time!Thx!
1.What was Henri Becquerel studying when he accidentally discovered radioactivity?
A.photography
B.properties of black light
C.properties of X-rays
D.solar energy
2.When Marie Curie isolated uranium from pitchblende, she realized that the pitchblende was more radioactive than the uranium she had extracted. What did she conclude about her observations?
A.Pitchblende itself is a radioactive element
B.The pitchblende sample contained an unknown radioactive element
C.The pitchblende sample was defective
D.Pitchblende should be used as radiation therapy
3.Henri Becquerel's original hypothesis was that fluorescent minerals became excited by a solar energy and gave off X-rays. However, after he discovered uranium minerals emitted their own radiation without the help of solar energy, he abandoned his hypothesis. Why did Becquerel abandon his first hypothesis?
A.He was afraid of ridicule from the scientific community for being wrong
B.He found new evidence that didn't support his original hypothesis
C.He couldn't repeat the results in multiple experiments.
D.He couldn't make the experiment work, so he came up with a new plan
4.Marie Curie had many "firsts". Which of the following is not one of Marie Curie's firsts?
A.first female Nobel Prize winner
B.first female professor in the Faculty of Sciences
C.first to suggest that atoms can change
D.first to discover X-rays
My answers:
1.D
2.B
3.A
4.D
58 answers
http://www2.lbl.gov/abc/wallchart/chapters/03/4.html
1.C
2. B
3. B
4.D
100%
they win
everything
answers:
1.D
2.B
3.A
4.D
answers
1.C
2. B
3. B
4.D
3.Henri Becquerel's original hypothesis was that fluorescent minerals became excited by a solar energy and gave off X-rays. However, after he discovered uranium minerals emitted their own radiation without the help of solar energy, he abandoned his hypothesis. Why did Becquerel abandon his first hypothesis?
A.He was afraid of ridicule from the scientific community for being wrong
B.He found new evidence that didn't support his original hypothesis
C.He couldn't repeat the results in multiple experiments.
D.He couldn't make the experiment work, so he came up with a new plan
4.Marie Curie had many "firsts". Which of the following is not one of Marie Curie's firsts?
A.first female Nobel Prize winner
B.first female professor in the Faculty of Sciences
C.first to suggest that atoms can change
D.first to discover X-rays
B
B
D
is correct i just got 100% on it!!!
1.C
2.B
3.B
4.D
C
B
B
D
I just took a quiz
B
B
D
Just took it! 100% XD
C
B
B
D
100 percent :D
C
B
B
D
is all 100!
C
B
B
D.
I took the test and got 100%
c
b
b
d
!!!!!!
1.c
2.b
3.b
4.d
100% connection students
:(
2.B
3.B
4.D
these are 100% answers believe me I took the assessment
B
B
D
is 100% correct thx everyone ;)
B
B
D
100% correct!
B
B
D
∞ %!!!!!!!!!
C
B
B
D
Thank you!
2. B
3. B
4. D
100%
B
B
D is correct
B
B
D
No lie this is right it got 100%
b
b
d
2. B
3. B
4. D
110% Garentee (R.I.P. spelling)
1:C
2:B
3:B
4:D
I just took the test and I got 100%
Using the answers
C, B, B, D
1.C
2.B
3.B
4.D
B
B
D
B
B
D
2. B- the pitchblende sample contained an unknown radioactive element
3. B- he found new evidence that didn't support his original hypothesis
4. D- first to discover xrays
B
B
D
100%!!!!
2020 is ruined by the coronavirus btw :(
USE CBBD
C
B
B
D
so for my awesome dudes have a five dollar bill [̲̅$̲̅(̲̅5̲̅)̲̅$̲̅]