Scientific Method and Characteristics of Life

This variable in an experiment is the one being deliberately changed -

• dependent variable

• independent variable

• data

• control group

In a controlled experiment, how many variables can be changed?

• one

• none

• two or more

• how ever many makes sense

Which variable will be either observed or measured during an experiment?

• dependent

• independent

• control

• following

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what is the dependent variable?

• Type of plant

• Plant growth

• Water, apple juice, milk

• Color of the plant leaves

A hypothesis is part of the scientific method. True or false?

• True

• False

Mr. Krabbs is trying a new money making scheme. On Tuesdays he is selling his crabby patties on multicolored buns. He usually averages 25 customers per day. On Tuesdays he now averages 27 customers. What is the independent variable?

• The number of customers

• The multicolored buns

• The crabby patties

• The day of the week

Suzanne usually walks to school. She wants to see if running to school will help her do better on quizzes in first period. What is her independent variable?

• How far she runs

• running to school

• how well she does on her quizzes

• walking to school

What is the basic unit of life?

• cell

• organ

• tissue

• organ system

A ______ is something in the environment that causes an organism to respond.

• Stimulus

• Cause

• response

• effect

When a baby kitten becomes an adult cat, this is an example of -

• energy metabolism

• response to stimuli

• growth and development

• having cells