5.PS.3.1
A battery-powered toy car moves across the floor. Identify the initial and final forms of energy.
Chemical → electrical → kinetic (motion)
Which material is a better insulator: foam or copper?
Foam
Why are variations within a species important?
They increase chances of survival in changing environments.
What type of landform is created by lava cooling?
Volcano / igneous rock formation
Why must engineers test their designs?
To determine if they solve the problem effectively.
A wind turbine generates electricity. Describe the energy transformation.
Kinetic (wind) → mechanical → electrical
How does insulation reduce heat transfer?
It slows conduction and convection.
How might thicker fur help animals survive in cold climates?
It provides insulation.
How do glaciers change Earth’s surface?
They scrape and move rock, causing erosion.
What is a constraint in an engineering problem?
A limitation such as cost, materials, or time.
Why is some energy always “lost” as heat during transformations?
Not all energy converts efficiently; some transfers as thermal energy.
Why does hot air rise in a room?
Warm air is less dense than cool air.
If a drought occurs, which plant trait might improve survival?
Deep roots.
Why do deltas form at river mouths?
Sediment is deposited as water slows down.
Why compare multiple solutions to the same problem?
To determine which works best.
A stretched bow launches an arrow. Explain how energy changes during this process.
Elastic potential → kinetic energy of arrow
A metal pan handle gets hot while cooking. Which type of heat transfer caused this?
Conduction
Why might certain traits become more common over time?
Organisms with helpful traits survive and reproduce.
Compare rapid changes (earthquakes) and slow changes (weathering).
Rapid changes happen suddenly; slow changes occur over long periods.
A design meets criteria but exceeds budget. Is it successful? Why or why not?
No, because it does not meet constraints.
Why can no machine be 100% efficient?
Some energy always transfers as heat due to friction.
Explain how radiation differs from conduction and convection.
Radiation transfers energy through waves and does not require matter.
Explain how environmental changes can affect which traits are advantageous.
New conditions may favor different characteristics needed for survival.
Explain how constructive and destructive forces interact to shape landforms.
Constructive forces build land up; destructive forces wear it down.
Explain how redesign improves performance after testing failures.
Engineers analyze weaknesses and modify the design to improve results.