What does the circulatory system do?

Pumps blood, oxygen and nutrients around the body via the heart, arteries and veins.

Name the three types of muscle tissue.

Skeletal, smooth and cardiac muscle.

What is the role of the lymphatic system?

Filters pathogens, returns excess fluid to blood, supports immunity.

What is the largest organ in the human body?

The skin (integumentary system).

State Newton's First Law of Motion.

An object remains at rest or in uniform motion unless acted on by an external force.

F = ma (Force = mass × acceleration).

What is acceleration?

The rate of change of velocity per unit time. Units: m/s².

Motion under gravity alone; acceleration ≈ 9.8 m/s² on Earth.

What is the powerhouse of the cell?

Mitochondria — produce ATP through cellular respiration.

What does the cell membrane do?

Controls what enters and exits the cell (selective permeability).

Difference between plant and animal cells?

Plant cells have a cell wall, chloroplasts and a large central vacuole; animal cells do not.

Control centre of the cell; contains DNA.

Function of ribosomes?

Synthesise proteins by translating mRNA.

What is the quadratic formula?

x = (−b ± √(b²−4ac)) / 2a

Simplify: x³ · x⁴

x⁷ (add exponents when multiplying same base).

What does 'factoring' mean?

Rewriting an expression as a product of its factors, e.g. x²+5x+6 = (x+2)(x+3).

How do you calculate the mean?

Sum all values then divide by the count of values.

The middle value when data is sorted in order.

Define standard deviation.

A measure of how spread out values are from the mean.

P(event) = (favourable outcomes) / (total outcomes)

What is a normal distribution?

A bell-shaped curve where data is symmetrically distributed around the mean.

The value a function approaches as the input approaches a given point.

What does a derivative represent?

The instantaneous rate of change (slope of the tangent line).

What event brought the USA into WWII?

The Japanese attack on Pearl Harbor, December 7, 1941.

The Allied invasion of Normandy, France on June 6, 1944.

What ended the war in the Pacific?

The atomic bombings of Hiroshima (Aug 6) and Nagasaki (Aug 9) 1945, followed by Japan's surrender.

What is the Parthenon?

A Greek temple on the Athenian Acropolis, dedicated to the goddess Athena.

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