Significant Figures
How many Sig Figs are in 1.3
2
Convert to standard notation: 4.7 X 10^4
47,000
Convert 5 kilometers to meters using dimensional analysis
5,000 meters
This variable is the variable that the scientist changes on purpose
The independent variable
The variable that the scientist measures is the...
Dependent variable
Convert to scientific notation: 234000
2.34 X 10^5
What's the experimental group?
Farhia keeps telling her mom that she doesn't need glasses and that she can see without them. Farhia's mom doesn't believe her and says that she must see better with glasses. She raises three fingers up and asks Farhia how many fingers she's showing. She keeps asking her this question while getting farther away until Farhia says she doesn't know. Farhia's mom then asks her to do the same thing with her glasses on.
Farhia wearing glasses
How many significant figures are in the number 0.00456?
3
Convert to standard notation: 8.923 X 10^2
892.3
How many seconds are in 3.5 hours using dimensional analysis?
12,600 seconds
Experiment: Are test scores impacted by the amount of sleep a student gets the night before a test?
Independent variable is:
The amount of sleep the student gets
Experiment: Are test scores impacted by the amount of sleep the student gets the night before the test?
What is the dependent variable?
The test scores
Convert to scientific notation: 25,360
2.536 X 10^4
What is the control group?:
Milena struggles with insomnia, meaning she has difficulty falling asleep. She was advised to use melatonin to help her sleep, but she doesn't know what dosage works best for her. She decides she'll take different amounts of melatonin every day and see how quickly she falls asleep.
Milena not using melatonin
round 0.00789 to two significant figures.
0.0079
Convert to standard notation: 987 X 10^5
98,700,000
8300 dam = ___________________ m
83,000 m
Experiment: Teacher wants to see how caffeine impacts test scores.
Independent variable is:
Amount of caffeine
Experiment: Teacher wants to know if caffeine impacts a students test scores.
What is the dependent variable?
Test scores
Convert to scientific notation: 8,000,000
8 X 10^6
What's the experimental group based off the following question:
"How does the type of liquid used to make ice cubes affect the rate at which it melts?"
The ice cubes receiving the different types of liquids
In the calculation (2.45 x 3.1), what would the answer be rounding to the correct number of significant figures?
7.6
Convert to standard notation: 3 X 10^6
3,000,000
Convert 56.7 m to cm
5,670
Experiment: Drug manufacturers are testing a medication for depression. They give one group a placebo, one group 10mg daily, another group 20 mg daily, and the last group 30mg daily. The people take a survey about their depression at the beginning of the month and again at the end.
What is the independent variable?
The amount of medication.
Experiment: A scientist wants to know if the amount of sunlight a plant gets impacts the plants health.
Dependent variable?
Health of the plant
Convert to scientific notation: 734,239
7.34239 X 10^5
What's the experimental group(s) based off the following scenario:
Mr. Meeseeks is trying to get Jerry to take two strokes off his golf swing (Get the golf ball in two less tries). He keeps suggesting different positions for Jerry to try out.
Jerry in the different positions
In the calculation (0.002 x 3.1), what would the answer be rounding to the correct number of significant figures?
0.006
Convert to standard notation: 3.425 X 10^8
342,500,000
230.2 mg to kg
0.0002302 kg
A scientist wants to know if caffeine has an impact on the memory of bees.
What is the independent variable?
The amount of caffeine
Is the dependent variable the CAUSE or the EFFECT?
The effect
Convert to scientific notation: 45,300
4.53 X 10^4
What's the control group for the following prompt:
Mangos grow in warm biomes. A botanist wants to determine the most optimal location to grow her red mango trees for sweetness. She decides to plant some in four different places, one in the mountain tops, one in its native habitat, one in wetlands, and one in a greenhouse. She thinks that her mangos taste best in the wetlands, but grow best in the greenhouse.
Mangos grown in their native habitat