LO 2D Prove Mastery (Unit 1-B)

In an experiment, a scientist adds fertilizer to one pond in order to compare the algae growth to a pond that does not receive fertilizer. The amount of algae that grows would represent a(n)

• a. model.
• b. dependent variable.
• c. prediction.
• d. independent variable.

Speed (on the y-axis) would represent which variable?

You are asked to study the effect of temperature on the volume of a balloon. The balloon's size increases as it is warmed. What is the independent variable?

• temperature
• the amount of air in the balloon
• the size of the balloon
• an identical balloon kept at room temperature
• Option 5

You are asked to study the effect of temperature on the volume of a balloon. The balloon's size increases as it is warmed. What is the dependent variable?

• temperature
• the amount of air in the balloon
• the size of the balloon
• an identical balloon kept at room temperature

You are asked to study the effect of temperature on the volume of a balloon. The balloon's size increases as it is warmed. What would be a control for this experiment?

• temperature
• the amount of air in the balloon
• the size of the balloon
• an identical balloon kept at room temperature

A report in the media states that a specific diet will protect individuals from cancer. However, no data supports this statement. Is this statement a...?

• fact
• conclusion
• hypothesis

This part of the experiment shows the effect of the one variable being tested.

• control group
• experimental group
• data
• variables

Penelope wanted to see if the temperature of the oven made cookies softer or harder. What is the dependent variable.

• Temperature of oven
• Hardness of cookie
• Type of oven

Mrs. Group wanted to know if the iPhone could stand up against being dropped from different heights. She dropped them from 3 heights and saw if they broke. What is the independent variable?

• if they broke
• drop height
• If they had a case on them or not

Which is NOT a step in the scientific method?

• Make observation
• Collect data
• Form a theory
• Form a hypothesis