Scientific Method-1
What is the dependent variable- the one you changed or the one that is measured ?
The one that is measured
This type of graph is used for showing percentages.
Convert 23 cm to m. (1 m = 100 cm)
1- What is your conversion factor to multiply with 23 cm?
2- Answer?
1- 1 m / 100 cm
2- 0.23 m
Best glassware to measure precise amounts of liquid
Graduated Cylinder
What word is used to describe how to appropriately smell unknown substances in lab?
WAFT
Factors that stay the same in an experiment so that the results are reliable are called…
Constants
In a controlled experiment, how many variables can be worked with at a time?
A. one B. two or three C. limitless
A. only one
Convert 3,600,000 mm to km.
(1 m=1000 mm and 1 km=1000 m )
1- What are the two conversion factors to multiply with 3,600,000 mm?
2- Answer?
1- Conversion factors to be used:
1m/1000 mm and 1 km/1000 m
2- Answer: 3.6 km (needs to be a smaller because the unit is getting bigger from mm --> km)
Used to grind solid materials into a powder
Mortar and Pestle
If your lab partner’s clothes catch on fire, what is the first thing you should do?
TELL THE TEACHER!!!
A rule or principle that describes HOW something happens in nature is a…(____ of gravity)
A law
List 3 things every line graph must have
Title, X-Axis label, Y-Axis label
Convert 71,000 mL to gallons. (1 gal = 3785.4 mL)
1- What is the conversion factor to be used?
1 gal/3785.4 mL or 3785.4 mL / 1 gal
2- Answer?
1- Since the given unit is mL, pick the denominator with mL: 1 gal/3785.4mL
2- 18.75 gal
Used to transfer liquids from large to small containers
Funnel
What is the best safety equipment for helping a person who is on fire?
FIRE BLANKET
If you increase the amount of spinach you eat, then you will increase the iron in your blood. What is the independent variable?
amount of iron in your blood (because that is what you measure and collect data from)
If you need to convert 32 Celsius to Fahrenheit. Which formula do you need to use?
C = (F-32) / 1.8
Convert 75°F to °C
1-What formula do you need to you?
2- Answer?
1- C= (F-32)/1.8
2- 24 degrees Celsius
The curve that forms in liquids in graduated cylinders.
Meniscus
List 3 things you should wear to protect yourself from chemicals.
1-Safety goggles,
2-Lab apron,
3- Long pants or closed toed shoes.
A team of scientists want to test if watching commercials makes kids eat more snacks when watching TV. They gather two groups of elementary school students. The first group watches 2 hours of TV with no food commercials. The second group watches 2 hours of TV with food commercials every 15 minutes. After the scientists record how many goldfish the students ate during the time period.
1- What is the CONTROL GROUP ?
2- WHAT is the EXPERIMENTAL GROUP?
1- Control group = group without food commercials
2- Experimental Group= Group WITH food commercials
ACCURACY & PRECISION
The actual value of the density of Zinc metal is 7.13 g/mL. Three students made experiments to find the density of the zinc. According to the data below, which student is the most accurate and precise?
Trial 1 Trial 2
Student 1 8.1 g/mL 10.5 g/mL
Student 2 7.10 g/mL 7.13 g/mL
Student 3 3.5 g/mL 3.5 g/mL
Student 2 - because the student's both trials are the closest to the accurate data(accuracy) and are also closest to each other(precision).
TRIVIA 🧐
two American aviation pioneers generally credited with inventing, building, and flying the world's first successful motor-operated airplane
👏👏👏Orville and Wilbur WRIGHT Brothers👏👏👏
TRIVIA🧐
The planet in our Solar System known for having a ring.
Saturn
TRIVIA🧐
The inventor of the telephone.
Alexander Graham Bell