NGSS
HS-PS1-1
25 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Physical Science · Chapter 1 · Lesson 1
The Scientific Method in Practice
A theory that explains everything predicts nothing.
Physical Science · Chapter 1 · Lesson 2
A number without a unit is not a measurement.
Physical Science · Chapter 1 · Lesson 3
Significant Figures and Uncertainty
Extra digits are a claim you cannot back.
Physical Science · Chapter 1 · Lesson 4
Graphing and Interpreting Data
A straight line through points is a claim, not a drawing.
Physical Science · Chapter 1 · Lesson 5
Designing a Controlled Experiment
A precise result can still support nothing.
Physical Science · Chapter 2 · Lesson 1
Heat it steadily and the temperature stops rising.
Physical Science · Chapter 2 · Lesson 2
Elements, Compounds, and Mixtures
Salt is not salty sodium mixed with salty chlorine.
Physical Science · Chapter 2 · Lesson 3
Physical and Chemical Properties
The test is whether you can get it back.
Physical Science · Chapter 3 · Lesson 1
Change the protons and you have changed the element.
Physical Science · Chapter 3 · Lesson 2
No chlorine atom weighs 35.45.
Physical Science · Chapter 3 · Lesson 3
The outer shell decides almost everything.
Physical Science · Chapter 3 · Lesson 4
More protons and the atom gets smaller.
Chemistry · Chapter 1 · Lesson 1
One question sorts almost everything.
Chemistry · Chapter 1 · Lesson 3
Let the units tell you if you are right.
Chemistry · Chapter 1 · Lesson 4
Density and Physical Properties
A property that does not depend on how much you have.
Chemistry · Chapter 2 · Lesson 1
Each model died of a specific experiment.
Chemistry · Chapter 2 · Lesson 4
Filling order is not shell order.
Chemistry · Chapter 2 · Lesson 5
Two forces, and every trend follows.
Honors Chemistry · Chapter 2 · Lesson 1
Brightness does not help if the frequency is wrong.
Honors Chemistry · Chapter 2 · Lesson 2
Four numbers, and no two electrons share all four.
Honors Chemistry · Chapter 2 · Lesson 3
Electrons spread out before they pair up.
Honors Chemistry · Chapter 2 · Lesson 4
The configuration, read off an instrument.
Honors Chemistry · Chapter 2 · Lesson 5
Trends are effective nuclear charge and distance, in competition.