algebra and geometry
biology
physics
chemistry
advanced topic
100

This is the value of x in the equation 2x+5=15.

5

100

The powerhouse of the cell.

mitochondria

100

The force that pulls objects towards Earth.

gravity

100

The chemical symbol for water.

H2O

100

The type of chemical reaction where energy is released as heat or light.

exothermic reaction

200

The formula for the area of a triangle.

½ × base × height

200

This green pigment is essential for photosynthesis.

chlorophyll

200

The unit of measure for force.

newton

200

The atomic number of carbon.

6

200

The branch of mathematics dealing with shapes and their properties.

geometry

300

The type of angle that measures exactly 90 degrees. 

90°

300

The process by which cells divide to produce two identical daughter cells.

mitosis

300

The law that states F = ma.

Newton's Second Law of Motion

300

The negatively charged particle in an atom.

electron

300

The smallest unit of life.

cell

400

The distance formula is derived from this theorem.

Pythagorean Theorem

400

The main organ of the circulatory system.

the heart

400

The bending of light as it passes from one medium to another.

refraction

400

The type of bond formed when atoms share electrons.

covalent bond

400

The scientist who formulated the law of universal gravitation.

Isaac Newton

500

The equation y = mx + b represents this type of graph.

linear graph

500

The type of symbiotic relationship where both organisms benefit.

mutualism

500

The measure of the total energy of motion in the particles of a substance.

thermal energy

500

The pH level of a neutral solution.

7

500

The type of graph used to represent the probability of events.

histogram