The steps of the scientific method are:
1. question
2. hypothesis
3. ??
4. data
5. conclusion
What is Experiment
100
convert to scientific notation
267000
What is 2.67*10^5
100
NaCl is a _______
What is compound
100
________ first put together the periodic table of elements according to their atomic weights.
Who is Mendeleev
100
What is the proton number for Calcium
What is 20
200
_________ is a specific statement of prediction.
What is Hypothesis
200
How many significant figures?
0.0123010
What is 6
200
If I thoroughly mix sugar and water, I form what kind of mixture?
What is homogeneous
200
______ are good conductors of electricity.
What is metals
200
If my atomic mass is 11 and my atomic number is 5, how many neutrons does the atom contain?
What is 6
300
Carlos is trying to find out whether adding salt to water would cause the boiling point of water to increase. In this experiment, the boiling point of water is the _______ variable
What is dependent
300
the correct value is 21.76. my results were 21.77, 21.68, 21.56. are my measurements accurate, precise, or both?
What is accurate but not precise
300
________ cannot be broken down into simpler substances.
What is an element
300
When iron reacts with oxygen, it forms iron III oxide. That is the ______ property of iron.
What is chemical
300
_____ are the same elements with a different number of neutrons.
What are isotopes
400
In an experiment, the variable that a scientist want to remain constant is called the _______ variable
What is control
400
If an object has a mass of 25g and a volume of 10ml, what is the density of the object (include units)?
What is 2.5g/ml
400
My substance looks the same throughout. If I evaporate the water, a white powder is left at the bottom of the container. My original substance was a
What is homogeneous mixture
400
Group 17 elements are very reactive and exist as diatomic molecules. This group is called the
What is halogens/halides
400
If the density of a block is .9g/cm^3, what is density of half of the block?
What is .9g/cm3
500
_______ are the conditions of an experiment that must remain the same for all the test trials.
What are constants
500
If Jimmy needs 20 marbles. Each bag of marbles cost $2 and contain 10 marbles. How much money would Jimmy need to get his marbles?
What is $4
500
Oil and water form what kind of mixture?
What is heterogeneous
500
_______ discribed the atom as having a central nucleus containing positive charges.
Who is Rutherford
500
What volume will be occupied by 7000 g of helium if 4.003 g of helium occupies 22.4 L?