Quiz 1 - Science
36.52 mg: ___ g
.03652 g
In the first 6 questions, how many of the observations were quantitative?
1
Step 1 of Scientific Method
1. Ask a question
14.72 kg: ___ mg
14720000 mg
Step 2 of Scientific Method
2. Do background research
Step 3 of Scientific Method
3. Construct hypothesis
.0035 hm: ___ dm
3.5 dm
Step 4 of Scientific Method
4. Test with an experiment
Step 5 of Scientific Method
5. Analyze data
Step 6 of Scientific Method
6. Draw conclusions
Graphing:
Axes must be straight - use a ruler Capitalize all titles and labels Use intervals that stay the same on a given axis Plot points, then draw line of best fit using a ruler if its straight or free handed if it curves. *NO MORE THAN ONE CURVE* Bar graph bars should be equally spaced with at least one space in between bars. THE PLACE WHERE THE AXES MEET IS CALLED THE ORIGIN AND ALMOST ALWAYS REPRESENTS THE POINT (0,0) ZEROS ARE NOT TO BE PLACED AT ANY OTHER PLACE ON THE GRAPH
A metal ball has a mass of 2,345g and a volume of 834 cm3. What's it's density?
D: M/ V D:2,345g ----------- 834cm3 D:2.81 g/cm
Formula for Density:
Density: Mass/ Volume
A solid is 5 cm tall, 3 cm wide, 2 cm thick. It has a mass of 129g. What's it's density?
Height X Length X Width: Volume V: 30 cm D: M/ V D:129g --------- 30cm D: 4.3 g/cm3
It must be cold outside, since most students are wearing coats - O or I?
I
The unhealthy plant must not have been given any fertilizer - O or I?
I
Does the amount of exercise help a persons heart rate? IV: DV: CV: Quantitative Hypothesis:
IV: Amount of exercise DV: Persons heart rate CV: The way you exercise/ the time of day you exercise - could determine the amount of energy you have, etc. *If a needed amount of CV Observations isn't listed, put 2* Quantitative Hypothesis: IF, I exercise for 1 hour, THEN it will help my heart rate by 10%.
An investigation was done to see if keeping the lights on for different amounts of time each day affected the number of eggs chickens laid. IV: DV: CV:
IV: Different amounts of time the lights are on for DV: Number of chicken eggs laid CV: Type of light/ room the chickens are in
Does water temperature change when you measure water at different depths in Lake Michigan? IV: DV: CV: Quantitative Hypothesis:
IV: Different depths in Lake Michigan DV: Change in water temperatures CV: Tool used to measure (don't be specific on tools), where you are measuring in Lake Michigan, etc Quantitative Hypothesis: IF, Lake Michigan is 10 ft deep, then the water temperature will decrease by 8 degrees.
K H D U D C M
Kilo Hecto Deca Unit Deci Centi Milli
Formula for Mass:
Mass: Volume X Density
Fourteen students are working on the experiment - O or I?
O
I see snow falling - O or I?
O
The water in the beaker is 22 degrees C - O or I?
O
There are seven graduated cylinders on the teachers desk - O or I?
O
Formula for Percent Error:
Percent Error: |O-E|X100 ------- E
Eric wrote the following hypothesis statement... If you we find the amount of density in the liquid, then the density will be 3.4 g/mL. After analyzing his data he found out the density of the liquid is 3.9 g/mL. What was his percent error and can he accept or reject his hypothesis?
Percent Error: |O-E|X100 ------- E Percent Error: |3.9g/mL-3.4g/mL|X100 -------------------------- 3.4 g/mL Percent Error: 14.71% - Rejected
Formula for Volume:
Volume: Mass/ Density
A piece of paper might be 20.8 ___ wide
cm
A person might be 16.5 ___ tall
dm
A stapler might be 160 ___ tall
mm