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Sergeeva-Olga [200]
3 years ago
11

1. What's the difference between a hypothesis and a theory? a. "Theory" is another word for "fact;" "hypothesis" is another word

for "guess." b. Hypotheses can't be proven; theories can. c. Theories have been confirmed through tests; hypotheses haven't. d. Theories contain many hypotheses; a hypothesis only contains one theory. 2. Place the following steps in sequence: A) Recognizing a problem; B) Testing a hypothesis; C) Drawing inferences a. A, C, B b. A, B, C c. B, C, A d. C, B, A 3. In the phrase, "The scientific method is an analytic process for determining why things happen," what's the best synonym for "analytic?" a. Probable b. Amazing c. Incoherent d. Logical 4. What must you do before you make a hypothesis? a. Run an experiment b. Make observations c. Form a theory d. Draw conclusions 5. If you were running an experiment to determine the temperature at which beans sprout the fastest, what would be the variable? a. The number of beans you plant. b. The height of the sprouts you grow. c. The amount of water you give the beans. d. The temperature at which each bean is kept 6. You should run an experiment several times to make sure your results are consistent. In the preceding phrase, what does "consistent" mean? a. Obvious b. Perfect c. Unchanging d. Testable 7. What might cause a theory to change over time? a. New laws passed by the government b. New but untestable ideas c. Changes in public opinion d. The discovery of new evidence 8. Evolution is one example of a theory. From what you know about the scientific method, what can you conclude about this biological theory? a. It's been tested many times. b. Scientists don't need to test it anymore. c. No one is allowed to test whether it's true or not. d. There is very little evidence to support it. 9. Which of the following is a testable hypothesis? a. Roses are more beautiful than violets. b. A plant needs at least five hours of sunlight per day to grow. c. Ice cream is delicious. d. Humans will someday land on Mars. 10. What happens if you test a hypothesis multiple times and the data doesn't support your prediction? a. Change the data to support your prediction b. Run the experiment again until you get the results you're looking for c. Conclude that your hypothesis cannot be proven d. Re-think your hypothesis 11. A controlled experiment is simply an experiment in which all factors are held constant except for one two three four 12. We make observations using our notebook calculator senses computer
Chemistry
1 answer:
34kurt3 years ago
3 0

Answer:

b. Hypotheses can't be proven; theories can.

Explanation:

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Which are components of cell theory? Check all that apply.
STatiana [176]

Answer:

All living things are made up of cells.

cells are the basic unit of structure and function of ll living things.

All cells are come from other cells.

Explanation:

The cell theory is historic scientific theory and is universally accepted. This theory was given by Robert Hook in 1665. According to this theory all living things are made up cells.

Cell:

Cell is the smallest unit of life and it is building block of life.

This theory consist of following points:

All living things are made up of cells.

Cells are the basic unit of structure and function of ll living things.

All cells are come from other cells. Which means that cells are originated from pre-existing cells.

The other given options:

Cells comes from nonliving matter.

Cells make up most organisms bu not all.

These are two are not the postulate of cell theory because all living organisms are made of cells.

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3 years ago
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gizmo_the_mogwai [7]

Answer:

C

Explanation:

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3 years ago
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0.5832 miles =____ft and ___ inches​
arlik [135]

Answer:

0.5832 miles =3079ft and 3.552 inches​  

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3 years ago
Help?
tino4ka555 [31]

Answer:

There is 52.33 grams of water produced.

Explanation:

Step 1: Data given

Mass of propane burned = 32.00 grams

Molar mass of propane = 44.1 g/mol

Oxygen is in excess

Molar mass of water = 18.02 g/mol

Step 2: The balanced equation

C3H8 + 5O2 → 4H2O + 3CO2

Step 3: Calculate moles of propane

Moles of propane = mass propane / molar mass of propane

Moles of propane = 32.00 grams / 44.1 g/mol

Moles of propane = 0.726 moles

Step 4: Calculate moles of H2O

Propane is the limiting reactant.

For 1 mol of propane consumed, we need 5 moles of O2 to produce 4 moles of H2O and 3 moles of CO2

For 0.726 moles of propane we'll have 4*0.726 = 2.904 moles of H2O

Step 5: Calculate mass of H2O

Mass of H2O = moles of H2O * molar mass of H2O

Mass of H2O = 2.904 moles * 18.02 g/mol

Mass of H2O = 52.33 grams

There is 52.33 grams of water produced.

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<h2><em>B</em></h2>

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