All Gizmos Answer Keys
80 Gizmos across all subjects
Life Science
23 GizmosPhotosynthesis Lab
Explore how plants use light, water, and carbon dioxide to produce glucose and oxygen through photosynthesis. Free answer key for all student exploration sheet questions.
Cell Division
Observe the stages of mitosis and learn how cells divide to produce identical daughter cells.
DNA Analysis
Use gel electrophoresis to analyze DNA fragments and solve a crime using DNA fingerprinting techniques.
Ecosystems
Investigate how organisms interact with each other and their environment in a balanced ecosystem.
Natural Selection
Simulate how natural selection acts on a population over time, leading to evolutionary change.
Circulatory System
Explore the structure and function of the human heart and circulatory system.
Human Karyotyping
Arrange human chromosomes into a karyotype and identify chromosomal abnormalities.
Food Chain
Explore how energy flows through ecosystems via food chains and food webs.
Human Respiratory System
Investigate how the lungs and respiratory system deliver oxygen to the body and remove carbon dioxide.
Inheritance and Punnett Squares
Use Punnett squares to predict how traits are passed from parents to offspring.
Digestive System
Follow the path of food through the digestive system and learn how nutrients are absorbed.
RNA and Protein Synthesis
Follow the process of transcription and translation to see how DNA codes for proteins.
Animal Behavior and Adaptations
Study how animals behave and adapt to survive in their environments.
Plant and Animal Cells
Compare plant and animal cells and identify the function of different organelles.
Nervous System
Learn how the brain, spinal cord, and nerves work together to control the body.
World Biomes
Compare the major biomes of the world and the organisms adapted to live in each one.
Meiosis
Compare meiosis and mitosis and understand how sex cells are produced.
Immune System
Learn how the body defends itself against pathogens using the immune system.
Photosynthesis and Respiration
Compare photosynthesis and cellular respiration and see how they are opposite processes.
Evolution by Natural Selection
Understand the mechanisms of evolution and how species change over time.
Diffusion and Osmosis
Understand how molecules move across cell membranes through diffusion and osmosis.
Energy Pyramid
Understand how energy flows through trophic levels in an ecosystem.
Human Evolution
Trace the evolution of humans from early primates to modern Homo sapiens.
Earth & Space Science
16 GizmosPlate Tectonics
Explore how tectonic plates move and interact to create earthquakes, volcanoes, and mountain ranges.
Rock Cycle
Trace the journey of rocks as they transform between igneous, sedimentary, and metamorphic types.
Weather Patterns
Analyze weather data and learn how air masses, fronts, and pressure systems create weather patterns.
Solar System Explorer
Explore the planets, moons, and other objects in our solar system and compare their properties.
Water Cycle
Trace the continuous movement of water through Earth's systems via evaporation, condensation, and precipitation.
Volcanoes
Investigate how volcanoes form, erupt, and shape Earth's surface.
Moon Phases
Explore the phases of the Moon and understand why the Moon appears to change shape.
Gravity and Orbits
Investigate how gravity governs the motion of planets, moons, and satellites in orbit.
Earthquakes and Seismic Waves
Understand what causes earthquakes and how seismic waves help scientists study Earth's interior.
Carbon Cycle and Climate
Learn how carbon moves through Earth's systems and how human activities affect climate.
Weathering and Erosion
See how rocks break down over time and how sediment is transported and deposited.
Tides
Understand what causes tides and why they change throughout the day and month.
Ocean Currents
Discover what drives surface and deep ocean currents and how they affect climate.
Fossils and Geologic Time
Use fossils to understand Earth's history and the geologic time scale.
Mineral Identification
Identify minerals using physical properties like hardness, luster, and streak.
Seasons and Earth's Tilt
Learn why Earth has seasons and how sunlight intensity changes throughout the year.
Physical Science
23 GizmosCircuits
Build and test series and parallel circuits to understand how current, voltage, and resistance are related.
Forces and Motion
Investigate how forces affect the motion of objects and explore Newton's laws of motion.
Wave Properties
Explore the properties of waves including amplitude, wavelength, frequency, and wave speed.
Chemical Reactions
Investigate the signs of chemical reactions and explore factors that affect reaction rates.
Density
Discover how density is calculated and why objects float or sink in different liquids.
Magnetism
Explore magnetic fields, poles, and how magnets attract and repel each other.
Energy Transformations
Investigate how energy changes from one form to another in everyday situations.
States of Matter
Explore the properties of solids, liquids, and gases and how matter changes between states.
Atoms and Molecules
Explore the structure of atoms and how atoms combine to form molecules.
Balancing Chemical Equations
Learn to balance chemical equations by adjusting coefficients to satisfy the law of conservation of mass.
Sound Waves and Hearing
Learn how sound travels as waves and how our ears detect different pitches and volumes.
Light and Reflection
Study how light reflects off surfaces and how mirrors form images.
Acids, Bases, and pH
Test the pH of different substances and learn what makes something acidic or basic.
Electromagnetism
Discover the connection between electricity and magnetism by building electromagnets.
Refraction and Lenses
See how light bends when it passes through different materials and how lenses focus light.
Stoichiometry
Use mole ratios from balanced equations to calculate quantities of reactants and products.
Periodic Table
Learn how elements are organized in the periodic table and predict their properties.
Nuclear Reactions
Compare fission and fusion reactions and understand radioactive decay.
Speed, Velocity, and Acceleration
Calculate speed, velocity, and acceleration and interpret motion graphs.
Heat Transfer
Learn the three methods of heat transfer: conduction, convection, and radiation.
Atomic Structure
Build atoms and understand how protons, neutrons, and electrons determine element identity.
Chemical Bonding
Compare ionic and covalent bonds and predict how atoms will bond.
Phases of Water
Explore the three phases of water — solid, liquid, and gas — and understand heating curves, phase changes, and latent heat. Free answer key for all student exploration sheet questions.
Math
18 GizmosLinear Functions
Explore linear functions by changing slope and y-intercept and observing effects on graphs.
Pythagorean Theorem
Discover the Pythagorean theorem and apply it to find missing side lengths of right triangles.
Theoretical and Experimental Probability
Compare theoretical and experimental probability through simulations and discover the Law of Large Numbers.
Slope-Intercept Form of a Line
Master the slope-intercept form y = mx + b and learn to write equations from graphs and tables.
Quadratic Functions
Graph parabolas and find key features like vertex, axis of symmetry, and roots of quadratic functions.
Adding and Subtracting Fractions
Master adding and subtracting fractions with like and unlike denominators.
Area of Polygons
Calculate the area of triangles, rectangles, parallelograms, and other polygons.
Solving Systems of Equations
Solve systems of linear equations using graphing, substitution, and elimination methods.
Exponents and Powers
Learn the rules of exponents and how to simplify expressions with powers.
Ratios and Proportions
Use ratios to compare quantities and solve proportion problems.
Mean, Median, Mode, and Range
Calculate and interpret measures of central tendency and spread in data sets.
Decimals, Fractions, and Percents
Convert between decimals, fractions, and percents and use them to solve real-world problems.
Adding and Subtracting Integers
Master the rules for adding and subtracting positive and negative numbers.
Angles and Triangles
Classify angles and triangles and use angle relationships to solve problems.
Volume of 3D Shapes
Calculate the volume of prisms, cylinders, pyramids, cones, and spheres.
Graphing Linear Equations
Graph linear equations using slope-intercept form, point-slope form, and tables.
Solving and Graphing Inequalities
Solve one-variable inequalities and graph solutions on number lines.
Order of Operations
Use PEMDAS to evaluate expressions with multiple operations.