This is the seventh of nine lessons from a student learning module called "Visualizing and Understanding the Science of Climate Change." This lesson addresses climate feedback loops and how these loops help drive and regulate Earth's...

Anje-Margriet Neutel describes some common positive and negative feedback loops, examining how an ecosystem's many loops come together to make its 'trademark sound.' [5:11]

Practice solving word problems with negative numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice solving challenging negative number addition and subtraction problems. Number line models, variables, and absolute value come together to push your knowledge of negative numbers even deeper (maybe even below zero!). Students...

Practice adding positive and negative single-digit numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice solving addition and subtraction problems with integers (positive and negative numbers). Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice matching number line diagrams to addition expressions involving negative numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice identifying equivalent expressions involving the addition and subtraction of negative numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice explaining the meaning of negative numbers in different scenarios. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Identify positive and negative integers on the number line. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice plugging in values to evaluate negative number addition and subtraction expressions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

In this exercise, students practice interpreting negative numbers. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

In this exercise, students practice finding negative numbers on the number line without reference to zero. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

Practice working through addition and subtraction problems using the number line. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

In this exercise, students practice finding negative numbers on the number line. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

In this exercise, students practice ordering expressions. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

Practice identifying the types of correlations shown in scatter plots. Sometimes we see linear correlations (positive or negative), sometimes we see non-linear correlations (the data seems to follow a curve), and other times we don't see...

Practice computing numbers with negative exponents. Exponents may be fractions. Students receive immediate feedback and have the opportunity to try questions repeatedly and to watch a video or get hints.

Practice matching addition and subtraction equations to real-world scenarios. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice matching situations to multiplication and division expressions and equations. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Recognize the negative sign as meaning the opposite of a number. Use the negative sign to find the opposites of numbers. In some items, we will find the opposite of an opposite. Students receive immediate feedback and have the...

Practice finding equivalent multiplication and division expressions. Numbers in these problems may be negative. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

In this exercise, students practice ordering negative numbers. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

Practice putting positive and negative numbers in order. For example, --2, 1, -5, and 3. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.