NSCAS Science Standards 3

Question 1

Which process in the water cycle returns water vapor to liquid water in clouds?

Accepted Answer

Condensation

Answer

Condensation is the process by which water vapor cools and changes back into liquid water droplets, forming clouds.

Question 2

A scientist wants to test whether fertilizer affects plant growth. Which variable should be kept the same in all groups?

Accepted Answer

Both B and C

Answer

A controlled experiment requires that all variables except the one being tested (fertilizer) remain constant, including plant type and sunlight.

Question 3

Which of the following structures is responsible for controlling what enters and leaves a cell?

Accepted Answer

Cell membrane

Answer

The cell membrane is a selectively permeable barrier that regulates what substances enter and exit the cell.

Question 4

Fossils of marine organisms are found in rock layers high in a mountain range. What does this most likely indicate?

Accepted Answer

Tectonic forces uplifted the seafloor over time

Answer

The presence of marine fossils in mountains indicates that tectonic activity uplifted rock layers that once lay on the ocean floor.

Question 5

Which type of wave requires a medium to travel through?

Accepted Answer

Mechanical waves

Answer

Mechanical waves, such as sound, require a physical medium (solid, liquid, or gas) to propagate.

(NSCAS) Nebraska Student-Centered Assessment System Practice Test