(Question)
If motion causes thermal expansion, then what causes thermal expansion? Answer choices: - power - Chimneys - Sun - motion - Energy. - sunlight - coal - energy
(Answer)
motion

(Question)
If growth rate can be estimated with tree rings, then what can be used to estimate a forest's growth rate? Answer choices: - rings - fibers - bamboo - bark - crown - wind - soil - traits
(Answer)
rings

(Question)
If substances found in soil are chemical elements that are essential for body processes, then substances found where are chemical elements that are essential for body processes? Answer choices: - bottles - countertops - soil - pockets - store - moles - sugar - skin
(Answer)
soil