Rasmussen University Marie Curie Exam Practice

Module 01 Content1.
Question 1
1 Point
Marie Curie was a Polish scientist that specialized in chemistry and physics. She
wanted to understand how X-rays worked and noticed in her studies that the
element, Uranium, gave off rays that could be measured but did not know what
the rays were. She assumed that the rays came from the uranium itself instead
of through different molecules interacting with each other. To study the rays, she
used an instrument, called an electrometer, that studied the electricity that the
rays passed through the air. Through this she was able to discover that the more
uranium atoms there were in a compound, the stronger the rays that came off of
it. She used this discovery to test other minerals that emitted more rays than
Uranium, and discovered the elements Thorium, Polonium and Radium. Through
her discoveries of these elements, scientists were able to find the structure of the
atom and even how the rays can be used to fight cancer. What was Marie Curie’s
observation?
2.
Question 2
1 Point
What was Marie Curie’s hypothesis?
3.
Question 3
1 Point
What was Marie Curie’s experiment to prove her hypothesis?
4.
Question 4
1 Point
What was the law Marie Curie discovered through her experiment?
5.
Question 5
1 Point
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What theories were formed from the law of Marie Curie’s experiments?
6.
Question 6
1 Point
Lina has worked hard to gather data for her experiments. With her last set of data she
received, she is ready to publish her paper in a peer-reviewed journal. In order to do that,
she has to make sure that all of her data has consistent SI units, significant figures and in
scientific notation if necessary. Help Jessica get all of her data in order. How many significant
figures are in 43.8lbs?
7.
Question 7
1 Point
Add 43.8lbs and 56.8923lbs. What is the answer in the correct significant figures?
8.
Question 8
1 Point
Convert the answer from #7 to kg. Use the correct significant figures.
9.
Question 9
1 Point
Convert the answer from #8 in kg to g. Use the correct significant figures.
10.
Question 10
1 Point
Write the answer from #9 in scientific notation. Use the correct significant figures.
11.
Question 11
1 Point
How many significant figures are in 643.78 quarts?
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12.
Question 12
1 Point
Multiply 643.78 quarts by 4.3562. What is the answer in the correct significant figures?
13.
Question 13
1 Point
Convert the answer in #12 to mL. Use the correct significant figures.
14.
Question 14
1 Point
Write the answer from #13 in scientific notation. Use the correct significant figures.
15.
Question 15
1 Point
Find the correct mass and the volume calculated from #10 to #13 to calculate
the density. Density = (4.7033 x 104 g/ 2.6540 x 106 mL) =
16.
Question 16
1 Point
The American Heart Association recommends to eat no more than 2,301mg of sodium per
day. Convert the mass of sodium to ounces, if 1 oz = 28.3459g. Use correct significant
figures. 2301mg x (0.001g / 1 mg) x (1 oz/ 28.3459g) =
17.
Question 17
1 Point
What is the difference between a heterogenous and a homogenous mixture?
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18.
Question 18
1 Point
Describe the difference between a solid, liquid or a gas in terms of the molecules in a
container, within each state of matter.
19.
Question 19
1 Point
Give an example of a chemical change that occurs in your life, regularly.
20.
Question 20
1 Point
With the rest of her data, Lina needs to make sure her numbers are in scientific notation so
that they are consistent to each other and easy to understand. For the following, write each
answer in scientific notation with the correct significant figures. 8,654 J x 3.45 =
21.
Question 21
1 Point
Kamal is a nurse that works in the ER. He knows the first thing he has to do is take the body
temperature of each patient. He has learned from his studies that the normal body
temperature is 37?C. If the body temperature is higher than 37?C, the patient has a fever,
and if the body temperature is below 37?C, the patient has hypothermia. Help Kamal figure
out if his patient is okay.
Patient #3: Kamal read a body temperature of 308.15?K. Convert K to C and write whether
the patient is normal, has a fever or has hypothermia. Use correct significant figures.
22.
Question 22
1 Point
Lina is working through her homework assignment and is having trouble with working
through some density equations. Help Lina with her homework. Use correct significant
figures and make sure the units are correct. What is the mass of chlorine if it has a volume of
68.78 mL and a density of 3.16g/L?
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23.
Question 23
1 Point
Lina is working through her homework assignment and is having trouble with
working through some density equations. Help Lina with her homework. Use
correct significant figures and make sure the units are correct. What is the mass
of mercury if it has a volume of 9.12 cm3 and a density of 13.593 g/mL?
24.
Question 24
1 Point
Dr. Henrietta Owusu was invited to give a presentation of her work at a medical
conference. Her presentation encompassed explaining various properties of
matter. At the presentation, she received a question to give examples to identify
various intensive and extensive properties of matter. Help her identify the
following properties below as intensive or extensive. Heat.
1.
Neither
2.
Intensive
3.
Extensive
4.
Both
25.
Question 25
1 Point
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Dr. Henrietta Owusu was invited to give a presentation of her work at a medical
conference. Her presentation encompassed explaining various properties of
matter. At the presentation, she received a question to give examples to identify
various intensive and extensive properties of matter. Help her identify the
following properties below as intensive or extensive. Boiling point.
1.
Neither
2.
Intensive
3.
Extensive
4.
Both
26.
Question 26
1 Point
Abayomi has several beakers of different mixtures and needs to figure out how to
identify each of them. Help him identify if the mixtures in each beaker is
heterogenous or homogenous: Beaker #8 has sweet ice tea with ice cubes.
1.
Neither
2.
Homogenous
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3.
Heterogenous
4.
Both
27.
Question 27
1 Point
Abayomi has several beakers of different mixtures and needs to figure out how to
identify each of them. Help him identify if the mixtures in each beaker is
heterogenous or homogenous: Beaker #9 contains coffee.
1.
Neither
2.
Homogenous
3.
Heterogenous
4.
Both
28.
Question 28
1 Point
Dr. Henrietta Owusu received a second question asking if she could provide
examples differentiating the physical and chemical properties of matter. Help her
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identify if the following changes are a chemical change or a physical change.
Souring of milk.
1.
Neither
2.
Physical change
3.
Chemical change
4.
Both
29.
Question 29
1 Point
Dr. Henrietta Owusu received a second question asking if she could provide
examples differentiating the physical and chemical properties of matter. Help her
identify if the following changes are a chemical change or a physical change.
Mixing chocolate syrup with milk.
1.
Neither
2.
Physical change
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3.
Chemical change
4.
Both
30.
Question 30
1 Point
Oberon took up archery recently and is trying his hardest to be both precise and
accurate with his shots. In his latest practice round, he shot at 4 different targets.
Identify if his shots in the target are accurate, precise, both accurate and precise,
or neither.
image00260bf8b30.jpg
1.
Both accurate and precise
2.
Precise, but not accurate.
3.
Accurate, but not precise.
4.
Neither accurate nor precise.
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