Scientific Method
What is an educated guess or testable prediction called?
Hypothesis
What variable does the scientist purposely change?
Independent variable
What worldwide measurement system is used by scientists?
International System of Units (SI)
What is the amount of space an object takes up?
Volume
What axis contains the independent variable?
X- axis
Name the three main branches of science.
Life science, Earth science, and physical science
What usually comes first: an observation or a hypothesis?
Observation
What variable responds to the change in an experiment?
Dependent variable
What SI unit would be appropriate for measuring the length of a classroom?
Meter (m)
What is the formula for density?
Density = Mass รท Volume
Which graph is best for showing how data changes over time?
Line Chart
True or False: A scientific theory is simply a scientist's guess.
False
What should a scientist do after collecting data from an experiment?
Analyze the data and draw a conclusion
What is something that stays the same throughout an experiment?
Constant
What is the amount of matter in an object?
Mass
What method can determine the volume of an irregularly shaped solid?
Water displacement
What axis contains the dependent variable?
Y-axis
A student wants to compare the favorite sports of 100 students. Which type of graph should be used?
Bar Graph
Why should an experiment have a clear, detailed procedure?
So other scientists can repeat the experiment
What is used as the standard for comparison in an experiment?
Control
Which changes when you travel from Earth to the Moon: mass or weight?
Weight
An object has a mass of 60 g and a volume of 20 mL. What is its density?
3 g/mL
What axis contains the dependent variable?
Y Axis
A rock causes water in a graduated cylinder to rise from 35 mL to 52 mL. What is the rock's volume?
17 mL
What is the difference between a scientific theory and a scientific law?
A theory explains observations using evidence and data; a law describes a consistent pattern in nature
A scientist changes the amount of water given to plants and measures their growth. Identify the independent and dependent variables.
Independent = amount of water; Dependent = plant growth
Convert 2,000 meters into kilometers.
2 Kilometers
Object A has a mass of 120 g and volume of 40 mL.
Object B has a mass of 100 g and volume of 20 mL.
Which is denser?
A = 3 g/mL. B = 5 g/mL
Object B is denser
Which graph represents an entire whole as 100% and divides it into parts?
Pie Chart or Circle Graph
A student changes the temperature of water and measures how long sugar takes to dissolve. Identify the independent and dependent variables.
Independent = water temperature; Dependent = time for sugar to dissolve