GED Science 2026 | Updated Practice Questions and
Answers | Complete Science Exam Prep Guide
,
, 1. A student wants to test the effect of sunlight on plant growth. She places one
plant in a sunny window and another in a dark closet. Both plants receive the
same amount of water and are the same type. After two weeks, the plant in the
window is taller and greener. What is the independent variable in this
experiment?
A. Height of the plant
B. Amount of water
C. Amount of sunlight
D. Type of plant
RATIONALE: The independent variable is the factor that is deliberately
changed by the experimenter. In this experiment, the amount of sunlight is being
changed (sunny window vs. dark closet). The height of the plant is the dependent
variable (what is measured), while amount of water and type of plant are
controlled variables.
2. Which of the following is the correct order of organization in a multicellular
organism, from simplest to most complex?
A. Organ system → organ → tissue → cell
B. Tissue → cell → organ → organ system
C. Cell → tissue → organ → organ system
D. Organ → tissue → cell → organ system
RATIONALE: The levels of organization in a multicellular organism are: cells
(basic unit of life), tissues (groups of similar cells), organs (structures made of
different tissues working together), and organ systems (groups of organs that
work together to perform a specific function).
3. A car is traveling at a constant speed of 20 m/s. How far will it travel in 15
seconds?
A. 150 m
B. 200 m
C. 300 m
D. 350 m
RATIONALE: Distance = speed × time. Distance = 20 m/s × 15 s = 300 m. The
correct answer is 300 meters.
Answers | Complete Science Exam Prep Guide
,
, 1. A student wants to test the effect of sunlight on plant growth. She places one
plant in a sunny window and another in a dark closet. Both plants receive the
same amount of water and are the same type. After two weeks, the plant in the
window is taller and greener. What is the independent variable in this
experiment?
A. Height of the plant
B. Amount of water
C. Amount of sunlight
D. Type of plant
RATIONALE: The independent variable is the factor that is deliberately
changed by the experimenter. In this experiment, the amount of sunlight is being
changed (sunny window vs. dark closet). The height of the plant is the dependent
variable (what is measured), while amount of water and type of plant are
controlled variables.
2. Which of the following is the correct order of organization in a multicellular
organism, from simplest to most complex?
A. Organ system → organ → tissue → cell
B. Tissue → cell → organ → organ system
C. Cell → tissue → organ → organ system
D. Organ → tissue → cell → organ system
RATIONALE: The levels of organization in a multicellular organism are: cells
(basic unit of life), tissues (groups of similar cells), organs (structures made of
different tissues working together), and organ systems (groups of organs that
work together to perform a specific function).
3. A car is traveling at a constant speed of 20 m/s. How far will it travel in 15
seconds?
A. 150 m
B. 200 m
C. 300 m
D. 350 m
RATIONALE: Distance = speed × time. Distance = 20 m/s × 15 s = 300 m. The
correct answer is 300 meters.
