Matter, Mass, Volume
What two properties must something have to be considered matter?
Mass and volume
What unit do scientists use to measure mass?
Grams (g)
What is density?
The amount of mass packed into a certain volume
What branch of science studies matter, energy, forces, and how things move and behave?
Physics
What is the scientific method?
The steps scientists follow to answer a scientific question.
What is volume?
The amount of space something takes up
What unit do we typically use to measure the volume of a liquid?
Milliliters (mL)
What is the formula for density?
Density = Mass ÷ Volume
What is the difference between an observation and an inference?
An observation is a fact gathered using your senses; an inference is a conclusion or educated guess based on observations.
What is the difference between a hypothesis and a conclusion?
A hypothesis predicts what we think will happen; a conclusion explains what actually happened and whether it supported our hypothesis.
What is mass?
The amount of matter in something
What unit do we use to measure the volume of a solid?
Cubic centimeters (cm³)
What is the unit for density when mass is measured in grams and volume in milliliters?
g/mL
What are the two things that make a question scientific?
It can be tested/measured, and it is not an opinion.
In an experiment, what is the difference between the independent and dependent variables?
Independent = what we change;
Dependent = what we measure.
How could you prove that air has mass?
Compare the mass of an inflated and deflated balloon
What does the word cubic mean?
Having three dimensions
An object has a mass of 30 g and a volume of 5 mL. What is its density?
6 g/mL
A student says, "The ice cube sank because the liquid is more dense." Is this an observation or an inference?
Inference
Why do scientists keep some things constant and repeat multiple trials?
To make experiments fair and results more reliable.
True or False: An object must be solid or liquid to be matter.
False — gases are matter too
What is the formula for finding the volume of a rectangular prism?
Length × Width × Height
Two objects have the same volume, but one has more mass. Which is more dense?
The object with more mass
Which of these is a scientific question?
A. Which soda tastes best?
B. Does the temperature of soda affect how high it erupts when Mentos are added?
C. Is soda delicious?
B
A scientist measures 10 cm, 14 cm, and 12 cm in three trials. What is the average?
12 cm