Midterm Exam in Science

Liam wanted to know if he could get his flowers to grow, so he planted and watered them daily, then measured the plant's height two weeks later. What is causing the change you want to see in the experiment?

• independent variable

• dependent variable

• constant

• controlled variable

Danica believed that fertilizer will make the plant grow faster, so he treated one plant with fertilizer and the other plant did not receive fertilizer. What is the independent variable?

• Danica

• the fertilizer

• the plant

Danica believed that fertilizer will make the plant grow faster, so he treated one plant with fertilizer and the other plant did not receive fertilizer. What is the DEPENDENT variable? Hint: What was measured?

• Danica

• the fertilizer

• plant growth

A plant receives the same amount of sunlight and water at the same time each day. What is the constant?

• different amount of sunlight

• same amount of sunlight, water & same time

• different plant

Jake believed that fertilizer will make the plant grow faster so he treated 1 plant with fertilizer and the other plant did not receive fertilizer. What is the EXPERIMENTAL group?

• plant receiving fertilizer

• plant receiving water because it needs to grow

• plant not receiving fertilizer

Mark believed that fertilizer will make the plant grow faster, so he treated 1 plant with fertilizer and the other plant did not receive fertilizer. What is the CONTROL group?

• plant receiving fertilizer

• Mark believing the plant will grow faster

• plant NOT receiving fertilizer

What is a factor that is measured for change in an experiment?

• control group

• independent variable

• constant

• dependent variable

What is the factor that an experimenter changes on purpose?

• dependent variable

• constant

• independent variable

• control

What are all the things that are kept the same in an experiment?

• controls

• constants

• data

• independent variables

Experiment: The effect of salt water on the height of the blades of grass

What is the independent variable in the experiment?

• salt water

• average

• height

• effect