Scientific Method
What is the first step of the scientific method?
What is making an observation/asking a question?
What is the SI unit for length?
Meter
What variable is deliberately changed?
Independent variable
How many centimeters are in one meter?
100 cm
What type of change does not form a new substance?
Physical change
What do scientists conduct to test a hypothesis?
Experiment
What is the SI base unit for mass?
Kilogram
If you measure reaction time, what type of variable is it?
Dependent variable
How many milliliters are in one liter?
1,000 mL
A substance with a pH of 2 is what?
Acidic
What type of data uses numbers and measurements?
Quantitative data
What prefix means 10-3?
Milli-
If you change acid concentration, what type of variable is it?
Independent variable
Convert 2 meters to centimeters.
200 cm
What subatomic particle has no charge?
Neutron
What variable is kept the same during an experiment?
Control variable
What prefix means 103?
Kilo-
What variable remains constant?
Control variable
Convert 0.75 liters to milliliters.
750 mL
What law states that matter cannot be created or destroyed?
Conservation of Mass
What is a scientific explanation supported by extensive evidence called?
Theory
What prefix means 10−6?
Micro-
A student changes the temperature of water and measures how quickly a tablet dissolves. What is the independent variable?
Water temperature
Convert 0.0035 kg to milligrams.
3,500 mg
What is the center of an atom called?
Nucleus
(different from cells, nucleus in atom contains protons and neutrons)