8th grade Science: how to help at home
What your child learns in 8th grade science in the Texas Essential Knowledge and Skills (TEKS), and simple things to try at home.
Focus areas this year
- Classifying matter, acids and bases, and conservation of mass
- Newton's laws, and waves of the electromagnetic spectrum
- Stars, galaxies, weather, hurricanes and climate
- Cells, genes, adaptations and ecosystem change
Easy ways to practice science at home
- Turn everyday questions into investigations: “Which paper towel holds the most water?”
- Read a science news story together and ask what evidence it gives.
- Look up how a household machine works, such as a bike gear, a lamp or a fridge.
- Have your child draw and label a diagram of something they just learned.
What each unit covers
Elements & Compounds
Elements, compounds and mixtures, reading chemical formulas, physical and chemical properties and changes, density, and common household chemicals, including why some should never be mixed.
Chemical Change
Telling a chemical change from a physical change, reading simple word and symbol equations, why mass is conserved, what speeds a reaction up, exothermic and endothermic changes, and GHS safety.
Forces, Motion & Momentum
Practices Newton's second law (F = ma), momentum and its conservation, and designing devices that reduce the force of a collision.
Light & Radiation
Wavelength and frequency, the electromagnetic spectrum from radio waves to gamma rays and what each is used for, reflection, refraction and color, and staying safe from UV radiation.
Cycles & Succession
How water, carbon and nitrogen are cycled through ecosystems, why cycling supports sustainability, and the difference between primary and secondary succession.
Cells & Life Processes
The cell theory, what organelles do in plant and animal cells, how photosynthesis and respiration are connected, osmosis, and how cells form tissues, organs and organ systems.
Genes & Heredity
Practices how genes on chromosomes code for proteins that shape traits, how mutations can be harmful, helpful or neutral, and how sexual and asexual reproduction differ in passing on genes.
Natural Selection
Practices how variation in traits leads some individuals to survive and reproduce more, how populations change over generations, and how artificial selection works.
Water, Acids & Bases
Practices the properties of water (cohesion, adhesion and surface tension) and the everyday things they explain, and comparing acids and bases, including their pH relative to pure water.
Stars, Galaxies & the Universe
Practices the life cycle of stars and classifying stars on the Hertzsprung-Russell diagram, spiral, elliptical and irregular galaxies and where our solar system sits in the Milky Way, and the evidence (such as galaxies moving apart and leftover radiation) for the Big Bang theory of the origin of the universe.
Weather, Winds & Hurricanes
Practices how energy from the Sun, the oceans and the atmosphere interact to shape weather and climate, global wind patterns such as the trade winds and westerlies, the jet stream, and how warm ocean water and air masses produce tropical cyclones such as Gulf hurricanes.
What Changes Climate
Practices how natural events (volcanic eruptions, meteor impacts, changes in ocean currents) and human activities (greenhouse gases, deforestation, urbanization) can influence climate, using evidence such as temperature records and Texas examples like urban heat islands.
Food Web Disruptions & Biodiversity
Practices how population changes, natural disasters and human actions disrupt the flow of energy in food webs, and how biodiversity makes an ecosystem more stable and its organisms healthier, with Texas examples such as Gulf Coast marshes, invasive species and coastal prairie.
What the report card levels look like at home
- Beginning
- Just getting started with this idea. Short, regular practice with lots of support helps most.
- Approaching
- Understands parts of it and is building confidence. Keep practicing the tricky parts.
- Meeting
- Has it! Mixed review now and then keeps it strong.
- Exceeding
- Applies it confidently, even in new or harder situations. Try challenge mode and real-life problems.
Your child’s teacher decides the level on the report card. Read the Texas report card guide.
Common questions
Turn everyday questions into investigations: “Which paper towel holds the most water?” Read a science news story together and ask what evidence it gives. Keep sessions short, about 10 to 15 minutes, and stop on a success.
The Texas Essential Knowledge and Skills (TEKS) 8th grade science units include Elements & Compounds, Chemical Change, Forces, Motion & Momentum, Light & Radiation, Cycles & Succession, Cells & Life Processes.
Free printable 8th grade science practice sheet
Questions from every unit, with an answer key.