Variables
Scientific Method
Unit Conversions
Dimensional Analysis
Scientific Notation
100
This variable is the variable that is measured in the experiment.
Dependent variable
100
Fill in the blank:
The scientific method is a _____ process that scientists use to answer questions and solve problems
Fluid
100
Using the mnemonic device provided in class, give me the prefixes in order
BE EXACT IN YOUR DELIVERY OF YOUR ANSWER!!!!
Mega...
Kilo
Hecto
Deka
Unit Base
Deci
Centi
Milli...
Unexpectedly/Mysteriously
100
The following example gives you the start to a dimensional analysis problem. The goal is to turn yards into feet. Where will the yards go in the next ratio to make sure we correctly set up our problem?
35 yd ft
Next ratio: 1 yd/3ft
Bottom of the fraction bar (in the demoninator)
100
What's the purpose of using scientific notation?
To condense really long numbers into a more readable format. This practice saves space on papers and time when relaying results from a study.
200
Give an example of a control from your soda carbonation experiment
Answers will vary
200
List the steps of the scientific method in order
Observe, Hypothesize, Experiment, Collect/Analyze Data, Conclude
200
32 m into cm
3200 cm
200
40,400 mm into ft
Round to the nearest whole number
133 ft
200
What sign would the exponent have for the following number, and how many decimal jumps would be necessary?
0.00073
Negative Exponent
4 jumps
300
A botanist (someone who studies plants) wants to study the effects of different liquids on plant growth.
For the experiment, the botanist decides to feed the plants water, pineapple juice, and Dr. Pepper. The botanist gives the same amount of each liquid to 3 different plants and measures their height after 2 weeks.
Identify the independent variable, dependent variable, and controlled variable in this experiment.
Independent= Type of Liquid
Dependent= Height of Plant
Control= Amount of Liquid
300
Why can the scientific method be considered fluid?
The process can flow from one experiment to the next, depending on the questions and curiosities arising from the original experiment
The steps can be revisited if errors are noted.
300
15,000 ms into das
1.5 das
300
72 mi/hr into km/hr
Round to the nearest whole number
116 km/hr
300
Convert 8.24x106 into extended notation
8,240,000
400
A wildlife biologist is studying grizzly bears and notices the bears floofing up their dens in November to prepare for hibernation. The wildlife biologist wishes to conduct an experiment on hibernation.
To prepare for this experiment, the wildlife biologist must plan for an entire year. The wildlife biologist chooses to investigate three different variables he believes affect hibernation: temperature, availability of food, and concentration of a chemical in the body that causes sleepiness. The wildlife biologist chooses three different bears of the same species in separate environments. Grizzly Bear #1 is in an ecosystem where deer are very scarce. Grizzly Bear #2 is in a colder climate, and Grizzly Bear #3 shot with a hormone dart every night around 11:30 p.m. to increase the hormone in question.
After 2 months of studying each Grizzly Bear, the wildlife biologist records that all three Grizzly Bear enter their caves to hibernate at the same time. Thus, the wildlife biologist declares that all three factors affect a bear’s ability to sense hibernation.
What is the independent, dependent, and a control?
Independent= Conditions
Dependent= Day/time of cave entering
Control= Type of bear
400
You are a palentologist digging up a fossil of a new dinosaur species discovered in Chile. Write a procedure for extracting this fossil with the following information in mind:
- You are writing the procedure from the moment you leave the station ALONE looking for a good site to look for dino bones
- Tool 1 is a chisel; Tool 2 is a walkie talkie; Tool 3 is a GPS which can be used to mark your location; Tool 4 is a rock hammer; Tool 6 is a brush; Tool 8 is called Vinac and is used if a fossil cracks while extracting; and Tool 9 are place markers
Answers may vary
400
0.881 ML to L
881,000 L
400
11.25 L into fluid ounces
NEEDED RATIO NOT ON THE BOARD:
1 cup= 8 fluid ounces
Round to the nearest whole number
381 fl oz
400
Convert 0.000000000000000000000000000000000000000001 into scientific notation
1x10-42
1.00x10-42
500
Explain why it is important for scientists to have controlled variables AND provide an example of an experiment where not having a controlled variable would affect the experiment.
Controlled variables are necessary because changing more than one variable at a time makes it difficult to figure out which variable affected the results.
Example experiments will vary.
500
You think that increasing the amount of salt in water will make it boil faster. Write out the steps you would follow in the scientific method to test this idea.
EACH STEP MUST BE INCLUDED AND SPECIFIC
Observation- We noted a difference in the amount of time needed to boil water when salt was or was not added to the water
Hypothesis- If salt is added to water, then the water will boil more quickly
Experiment- 10g of salt will be added to a pot containing 3 cups of water. The water will then be placed on the 7 setting, and the amount of time needed for steam to be produced will be tracked. The procedure will then be repeated with 5g of salt and 0g of salt. Each amount of salt will require 3 trials
Data- The amount of time will be tracked in a table.
Conclusion- From the results, the hypothesis will be accepted or refuted
500
915 µg into kg
Then turn this number into scientific notation
0.000000915
9.15x10-7
500
45 mi/hr into m/s
Round to the hundredths place
20.16 m/s
500
Make an estimate as to how many stars are in the Milky Way Galaxy. Then write this number in scientific notation. The team who is the closest to the correct number with accurate scientific notation wins the points
200 billion (200,000,000,000)
2.0x1011