## SAT Question of the Day

The SAT question of the day is a Geometry Question that has already been addressed on this blog: click here to see an explanation.

## ACT Question of the Day

The ACT question of the day is a science question that tests your ability to translate the information in a table into a graph.

You are given a graph and told that it represents the relationship between concentration and sediment depth for one of the ions or dissolved gasses in your table. Start by reading the graph. You don't know what it represents, but you do know that at a depth of 0 cm, this stuff has a concentration of 1 ppm.

Look up at your table. Go to the row that represents a depth of 0 cm. If you follow that row, there is only one column that has a value of 1 in this row. That column is CO2.

You have the answer! If you want to be sure, check another value. In your graph, the value at a depth of 20 cm is also 1. Look at your table. In the row representing a depth of 20 cm, there is only one column that has a value of 1. This is the CO2 column.

The correct answer is (H): Carbon dioxide (CO2).

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