Science Investigations
A student tests how sunlight affects plant growth. She changes the amount of sunlight each plant receives. What is the independent variable?
A. Plant height
B. Amount of sunlight
C. Type of plant
D. Soil type
B. Amount of sunlight
Which property describes how a substance reacts with another substance?
A. Density
B. Chemical property
C. Mass
D. Volume
B. Chemical property
Which process occurs when water vapor cools and forms clouds?
A. Evaporation
B. Condensation
C. Precipitation
D. Runoff
B. Condensation
When a flashlight is turned on, what energy transformation occurs?
A. Chemical → Light and Thermal
B. Mechanical → Electrical
C. Thermal → Chemical
D. Light → Mechanical
A. Chemical → Light and Thermal
Which statement correctly describes renewable resources?
A. They cannot be replaced
B. They take millions of years to form
C. They can be replenished naturally in a short time
D. They are only found underground
C. They can be replenished naturally in a short time
Which tool is best for measuring the volume of a liquid accurately?
A. Balance
B. Thermometer
C. Graduated cylinder
D. Meter stick
C. Graduated cylinder
What causes the phases of the Moon?
A. Earth’s shadow covering the Moon
B. The Moon producing its own light
C. The Moon’s position relative to Earth and the Sun
D. Changes in the Moon’s size
C. The Moon’s position relative to Earth and the Sun
What is a watershed?
A. A body of saltwater
B. Land where all water drains to a common location
C. A type of underground water source
D. A water purification system
B. Land where all water drains to a common location
What happens to an object’s motion when an unbalanced force acts on it?
A. It stays at rest
B. It continues at constant speed
C. It changes speed or direction
D. It loses all mass
C. It changes speed or direction
Why is conservation of natural resources important in Virginia?
A. Resources are unlimited
B. It prevents the use of renewable energy
C. It helps protect ecosystems and ensures future availability
D. It increases pollution
C. It helps protect ecosystems and ensures future availability