NASA
Nasa Earth Observatory: Mystery of the Missing Carbon
This article discusses the mystery of the one to two billion metric tons of missing carbon from the global carbon budget. Scientists do not know where between fifteen and thirty percent of the carbon released each year disappears to, but...
PBS
Pbs: The Lowdown: Poverty Trends: What Does It Mean to Be Poor in America?
Use math to learn about changes in US wealth distribution and poverty rate over time in this interactive from KQED. In the accompanying classroom activity, students interpret the graphs and consider how the poverty rate spike following...
Science Struck
Science Struck: How to Calculate Percentage Increase
Explains and demonstrates how to calculate the percentage increase from year to year and how to calculate it using an Excel spreadsheet.
Sophia Learning
Sophia: Using Percentages in Statistics: Lesson 2
This lesson will investigate some of the uses of percentages in statistics. It is 2 of 3 in the series titled "Using Percentages in Statistics."
Texas Education Agency
Texas Gateway: Empirical Formula
This tutorial reviews how to calculate molecular formula by giving students video, exercises, and practice.
TeachEngineering
Teach Engineering: Solar Water: Heat It Up!
Students explore energy efficiency, focusing on renewable energy, by designing and building flat-plate solar water heaters. They apply their understanding of the three forms of heat transfer (conduction, convection and radiation), as...
CK-12 Foundation
Ck 12: Algebra: Rational Equations Using Proportions
[Free Registration/Login may be required to access all resource tools.] Learn how to solve rational equations using proportions.
Sophia Learning
Sophia: Using Percentages in Statistics: Lesson 3
This lesson will investigate some of the uses of percentages in statistics. It is 3 of 3 in the series titled "Using Percentages in Statistics."
Physics Aviary
Physics Aviary: Mc Culley's Trig Thing
This program gives students a visual representation of sine and cosine at different angles. A unit vector will cycle through different angles and students can see the changes that take place to the horizontal part and the vertical part...
Texas Instruments
Texas Instruments: I'm Melting, I'm Melting
In this activity you will use the EasyTemp temperature sensor. Determine the change in thermal energy for a given mass of ice. Determine the heat of fusion of ice and the percent error.
Physics Aviary
Physics Aviary: Energy Loss Lab
This lab is designed to have students investigate the amount of energy lost by a ball when it bounces. Students will change the starting height of the ball and see how this affects the amount of energy lost and the percent of the...
Science Struck
Science Struck: What Are Ocean Trenches and How Are They Formed?
Around 72 percent of the Earth's surface is found under the oceans. It has always been contributing to the dynamically changing face of the Earth through the tectonic phenomenon occurring at its depths. Such a naturally occurring...
AAA Math
Aaa Math: Multiplying by Repeated Addition
Find the relationship between multiplication and addition at this lesson from AAA Math. The game gives an addition problem that you change into a multiplication problem. Your correct and incorrect answers are shown, as well as a percent...
Curated OER
Educational Technology Clearinghouse: Maps Etc: South China, 1971
"South China comprises the drainage basins of the middle and lower Yangtze River, the basin of the His Chiang (West River) in Kwangtung and Kwangsi; and the mountainous coastal provinces of Fukien and Chekiang. The division between the...
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