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Direct linkDrouin, Pamela; Welty, David J.; Repeta, Daniel; Engle-Belknap, Cheryl A.; Cramer, Catherine; Frashure, Kim; Chen, Robert – Science Scope, 2006
In this article, the authors present a classroom experiment that was developed to introduce middle school learners to the carbon cycle. The experiment deals with transfer of CO[subscript 2] between liquid reservoirs and the effect CO[subscript 2] has on algae growth. It allows students to observe the influence of the carbon cycle on algae growth,…
Descriptors: Research Design, Middle School Students, Science Experiments, Secondary School Science
PDF pending restorationNational Inst. of Child Health and Human Development (NIH), Bethesda, MD. – 1994
The National Institute of Child Health and Human Development (NICHD) Study of Early Child Care is an ongoing, prospective, 3-year longitudinal study of over 1,300 full-term healthy infants and families from 10 sites across the United States. While the sample is not nationally representative, the subjects come from major regions of the country: the…
Descriptors: Child Development, Data Collection, Day Care, Day Care Effects
PDF pending restorationNational Inst. of Child Health and Human Development (NIH), Bethesda, MD. – 1991
The National Institute of Child Health and Human Development (NICHD) Study of Early Child Care is an ongoing, prospective, 3-year longitudinal study of over 1,300 full-term healthy infants and families from 10 sites across the United States. While the sample is not nationally representative, the subjects come from major regions of the country: the…
Descriptors: Child Development, Data Collection, Day Care, Day Care Centers
PDF pending restorationNational Inst. of Child Health and Human Development (NIH), Bethesda, MD. – 1992
The National Institute of Child Health and Human Development (NICHD) Study of Early Child Care is an ongoing, prospective, 3-year longitudinal study of over 1,300 full-term healthy infants and families from 10 sites across the United States. While the sample is not nationally representative, the subjects come from major regions of the country: the…
Descriptors: Child Development, Data Collection, Day Care, Day Care Centers
PDF pending restorationNational Inst. of Child Health and Human Development (NIH), Bethesda, MD. – 1992
The National Institute of Child Health and Human Development (NICHD) Study of Early Child Care is an ongoing, prospective, 3-year longitudinal study of over 1,300 full-term healthy infants and families from 10 sites across the United States. While the sample is not nationally representative, the subjects come from major regions of the country: the…
Descriptors: Child Development, Data Collection, Day Care, Day Care Centers
PDF pending restorationNational Inst. of Child Health and Human Development (NIH), Bethesda, MD. – 1994
The National Institute of Child Health and Human Development (NICHD) Study of Early Child Care is an ongoing, prospective, 3-year longitudinal study of over 1,300 full-term healthy infants and families from 10 sites across the United States. While the sample is not nationally representative, the subjects come from major regions of the country: the…
Descriptors: Child Behavior, Child Development, Data Collection, Day Care
