Topic 1

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.

What is the independent variable?

• Dropping the same way

• Wing Length

• Amount of time it takes the helicopter to hit the floor

• Dropping from the same height

According to the data table, which two days had the greatest increase in growth?

• Day 1 and Day 2

• Day 2 and Day 3

• Day 3 and Day 5

• Day 4 and Day 5

The ___________________ variable is the factor in the experiment that responds to the thing you’re testing.

• dependent

• controlled

• independent

• scientific

A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of plants that can live in the water. In this experiment the dependent variable is _______________________________.

• the water

• the temperature of the water

• the number of plants that can live in the water

• the amount of salt in the water

Look at the line graph.  Which statement is consistent with the line graph?

• The ability of air to hold moisture increases as temperature increases.
• The ability of air to hold moisture decreases as temperature increases.
• The ability of air to hold moisture decreases and then increases as temperature increases.
• The ability of air to hold moisture stays the same regardless of temperature.