2PT SR7 ARIS

A group of students wants to find out how different amounts of sunlight affect the growth of their bean plants. They place some plants under full sunlight, some under partial sunlight, and some in the shade. All the plants are watered with the same amount of water and grown in the same type of soil. The plants in the shade are used as a basis for comparison.

What is the independent variable in the experiment?

• Type of soil

• Amount of water

• Amount of sunlight

• Height of the plant

A group of students wants to find out how different amounts of sunlight affect the growth of their bean plants. They place some plants under full sunlight, some under partial sunlight, and some in the shade. All the plants are watered with the same amount of water and grown in the same type of soil. The plants in the shade are used as a basis for comparison.

What is the dependent variable in the experiment?

• Type of soil

• Amount of water

• Amount of sunlight

• Height of the plant

A group of students wants to find out how different amounts of sunlight affect the growth of their bean plants. They place some plants under full sunlight, some under partial sunlight, and some in the shade. All the plants are watered with the same amount of water and grown in the same type of soil. The plants in the shade are used as a basis for comparison.

Which of the following is a controlled variable?

• Number of leaves

• Type of soil used

• Height of the plant

• Amount of sunlight

What is a variable in a scientific investigation?

• The equipment used to collect data

• The final result or conclusion of an experiment

• A factor that never changes during an experiment

• A factor that can change or be controlled in an experiment

Azaleah is testing how water temperature affects the amount of oxygen dissolved in water.

Which should be kept constant to ensure a fair test?

• Type of experimenter

• Temperature of water

• Volume of water and container

• Type of thermometer used by the researcher

King investigates how pH of soil affects the height of tomato plants.

Which correctly identifies the variables?

• Independent: soil pH; Control: plant height

• Independent: plant height; Dependent: soil pH

• Independent: soil pH; Dependent: plant height

• Independent: fertilizer; Dependent: plant height

Which of the following correctly matches the type of variable to its role?

• Constant – kept the same

• Independent – measured

• Dependent – manipulated

• Control – changed during the experiment

Which of the following describes a variable?

• Factors that are immeasurable

• Factors that are always kept the same

• Factors that can change or be controlled

• Factors that never change

Why are control variables important in an experiment?

• To prove the hypothesis is immeasurable

• To prevent other factors from influencing the outcome

• To keep the dependent variable constant with the conclusion

• To increase the number of variables being tested

What is typically used to visually assess linear relationships between two variables?

• Bar chart

• Histogram

• Scatter plot

• Box plot