*Question*
If seasons happen because of orbital tilt, then what causes seasons to change? Answer choices: - Time and energy - gravity - orbital tilt - clouds - global warming - weather - climate - an object
**Answer**
orbital tilt

*Question*
If living things all require energy for reproduction, then what do all living things require in order to reproduce? Answer choices: - Proteins - food - DNA - nutrients - energy - Light - bamboo - sunlight
**Answer**
energy

*Question*
If mitosis often causes growth, then what does mitosis often cause? Answer choices: - death - growth - cell shrinkage - DNA - nucleus - gene flow - illness - pregnancy
**Answer**
growth

*Question*
If mantle convection causes earthquakes, then mantle convection causes what? Answer choices: - demolitions - global warming - earthquakes - forest fires - erosion - tsunamis - heat energy - heating liquids
**Answer**
earthquakes