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Search every subject world, from Preschool to Grade 12. The first five courses of every subject path are free.

8 courses

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Science · Grade 4

Investigations, Measurement and Evidence

Fourth graders sharpen the tools of investigation. They choose the right tool and metric unit for each measurement and read scales carefully, run a simulated investigation on how water temperature affects dissolving time, calculate the average of repeated trials and spot measurement errors, and separate observations from inferences when building a claim with evidence and reasoning.

  • 3 lessons
  • About 95 min
  • Quiz: 9 questions
Free starter

Science · Grade 4

Energy and Motion

A faster ball knocks over more pins. Why? Learners gather evidence that the faster an object moves, the more energy it has, using a ramp simulation and collision data. They trace where the energy goes when objects collide (into the motion of the other object, sound and a little warming), predict collision outcomes and write an explanation that connects speed and energy.

  • 3 lessons
  • About 95 min
  • Quiz: 9 questions
Free starter

Science · Grade 4

Energy Transfer and Devices

Energy travels: heat moves along a metal spoon, light crosses a room, sound reaches your ear and electric current flows through wires to light a bulb. Learners gather evidence of each kind of transfer with heat and circuit simulations, discover what makes a bulb brighter or dimmer, trace the energy conversions inside everyday devices and refine a design of their own.

  • 3 lessons
  • About 100 min
  • Quiz: 9 questions
Free starter

Science · Grade 4

Waves and Information

Waves carry energy without carrying the water along: a floating cork just bobs up and down. Learners model waves with amplitude and wavelength, then model how we see: light from a source bounces off objects and enters our eyes. Finally they use patterns such as flash codes and pixel grids to send information, and compare different solutions for communicating across a distance.

  • 3 lessons
  • About 100 min
  • Quiz: 9 questions
Free starter

Science · Grade 4

Structures, Senses and Survival

Plants and animals are built from structures that work together: outside ones like thorns, shells and eyes, and inside ones like hearts, lungs, stems' water tubes and skeletons. Learners connect each structure to how it helps the organism survive, grow, behave and reproduce, model how senses send information to the brain so an animal can respond, and build arguments about structures from evidence.

  • 3 lessons
  • About 100 min
  • Quiz: 9 questions
Free starter

Science · Grade 4

Rocks, Fossils and Earth History

A canyon wall is like a history book written in stone. Learners model how layers of sediment become rock, use the rule that lower layers are usually older, and read the fossils in each layer to work out how a place changed from ocean to swamp to dry land. They then explain how patterns in rock formations, such as a river-cut canyon, show that landscapes change over very long times.

  • 3 lessons
  • About 100 min
  • Quiz: 9 questions

Science · Grade 4

Weathering, Erosion and Natural Hazards

Water, ice, wind and roots break rock apart (weathering) and carry the pieces away (erosion). Learners measure weathering in a model, read maps to find patterns in where mountains, volcanoes and earthquakes occur, and compare engineering solutions that reduce the impact of natural hazards on people, from earthquake-resistant buildings to tsunami warning systems.

  • 3 lessons
  • About 105 min
  • Quiz: 9 questions

Science · Grade 4

Natural Resources and Engineering Tradeoffs

Where does the energy for our lights and buses come from? Learners trace energy and fuels back to natural resources, sort them into renewable and nonrenewable, and combine information about how getting and using each resource affects the environment. Then, as engineers for a fictional town, they compare energy options in a decision table and recommend a plan that balances criteria, constraints and tradeoffs.

  • 3 lessons
  • About 100 min
  • Quiz: 9 questions