PTA Science Fundamentals

Question 1

What are the three states of matter?

Accepted Answer

Solid, liquid, and gas

Answer

Matter exists in three common states: solid (fixed shape and volume), liquid (fixed volume, variable shape), and gas (variable shape and volume).

Question 2

What is the water cycle?

Accepted Answer

The continuous movement of water through evaporation, condensation, precipitation, and collection

Answer

The water cycle describes how water continuously moves: evaporating from surfaces, condensing into clouds, falling as precipitation, and collecting in bodies of water.

Question 3

What is photosynthesis?

Accepted Answer

The process by which plants convert sunlight, water, and CO2 into glucose and oxygen

Answer

Photosynthesis allows plants to use solar energy to combine carbon dioxide and water into glucose (food) and oxygen.

Question 4

What is Newton's First Law of Motion?

Accepted Answer

An object at rest stays at rest and an object in motion stays in motion unless acted on by an external force

Answer

The law of inertia states that objects resist changes in their state of motion — they keep doing what they are doing unless a force intervenes.

Question 5

What is the difference between an element and a compound?

Accepted Answer

An element is a pure substance of one atom type; a compound is two or more elements chemically bonded

Answer

Elements cannot be broken into simpler substances (like gold or oxygen), while compounds are two or more elements chemically combined (like water: H2O).

(PTA) Practice Tests Academy Practice Test

(PTA) Practice Tests Academy Practice Test

PTA Science Fundamentals