AzM2 Science Assessment 1

Question 1

Which of the following BEST describes the role of producers in an ecosystem?

Accepted Answer

They convert sunlight into food through photosynthesis

Answer

Producers (plants, algae) use photosynthesis to convert sunlight, water, and carbon dioxide into food (glucose), forming the base of all food chains.

Question 2

A student drops a ball from different heights and measures how high it bounces. What is the INDEPENDENT variable in this experiment?

Accepted Answer

The height from which the ball is dropped

Answer

The independent variable is what the student intentionally changes. The student changes the drop height, so that is the independent variable.

Question 3

Water changes from liquid to gas during evaporation. What type of change is this?

Accepted Answer

Physical change, because the water molecules remain H₂O

Answer

Evaporation is a physical change — the water changes state (liquid to gas) but the molecules remain H₂O. No new substance is created.

Question 4

The Earth's layers from outermost to innermost are:

Accepted Answer

Crust, mantle, outer core, inner core

Answer

Earth's layers from outside to inside: crust (solid rock), mantle (hot, flowing rock), outer core (liquid iron/nickel), inner core (solid iron/nickel).

Question 5

Which process in the water cycle returns water from the atmosphere to the Earth's surface?

Accepted Answer

Precipitation

Answer

Precipitation (rain, snow, sleet, hail) returns water from clouds in the atmosphere to Earth's surface.

AzM2 Practice Test

AzM2 Practice Test

AzM2 Science Assessment 1