What is a hypothesis and why is it so tricky to teach?

How can students benefit from participating in a science fair?

How are testable questions different than other questions?

Graphing in Science

Units of measurements: an overview

How do you convert between units?

How is mass different from weight?

What are the basics of the International System of Units (SI)?

Why doesn’t the U.S. use the metric system?

What are rates? And how do they differ from ratios?

What is a baseline measurement and why is it important in science?

What are good ways to graph changes over time? Changes based on conditions?

What are ecological disturbances and recoveries? Are disturbances necessarily bad? Are people always involved?

What is a food web with trophic levels?

What is a Punnett Square and how does it relate to dominant and recessive traits?

How do genes that cause disease stay in populations generation after generation?

What are the big ideas related to Mendel’s experiments?

Beyond Mendel’s Laws: What else do we know about genetics, beyond Mendel?

What are the common misconceptions related to evolution?

Why is the story of the peppered moth so famous and important?

How do position, distance, time, speed, velocity, acceleration, force, mass, and momentum relate to one another?

What is “work” as a science term? How is it measured?

Can things moving through the air encounter friction?

What is gravity?

How is a pendulum helpful in thinking about kinetic and potential energy?

What are the different classes of levers?

What does atomic structure have to do with how atoms bond with each other?

What evidence first led chemists to adopt the modern atomic theory of matter?

What is “power” mean when talking about work and energy?

How do generators create electricity?

What is energy transfer?

Why are some lakes salty? And why are some lakes alkaline?

What is involved in studying the environmental impact of a construction project?

What do scientists mean when they say the cell is the basic unit of life?

Why do biologists study yeast? What exactly is yeast?

How do cells do the things they do?

How do substances pass through the cell membrane on their own?

How does the cell move large particles through the cell membrane?

How do I teach students about microscopes?

What types of waves are there, and what do they have in common?

How can energy travel when matter doesn’t?

Why do electromagnetic signals (and lots of other phenomena) get weaker with distance?

How are digital signals a more reliable way to encode and transmit information than analog signals?

What is the difference between physical and chemical change?

What is the difference between chemicals and mixtures?

How does the density of an object relate to the mass of an object?

How is liquid displacement used in density measurement?

What exactly is electricity?