The collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
What is the solar system?
100
Animals that eat plants only.
What are herbivores?
200
A system of biological structures and processes within an organism that protects against disease.
What is an immune system?
200
Measures how acidic or basic a substance is. It ranges from 0 to 14.
What is a pH scale?
200
Scalar quantity that refers to "how much ground an object has covered" during its motion.
What is distance?
200
The sixth planet in the solar system.
What is saturn?
200
Any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table.
What is a noble gas?
300
Thread-like structures located inside the nucleus of animal and plant cells.
What is a chromosome?
300
An atom or molecule in which the total number of electrons is not equal to the total number of protons, giving the atom or molecule a net positive or negative electrical charge.
What is an ion?
300
Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
What is Newton's First Law of Motion or Law of Inertia?
300
A strong, rapid increase in the brightness of a star.
What is a nova?
300
A lightbulb that has a filament that glows inside to give off light.
What is an incandescent?
400
A specialized type of cell division which reduces the chromosome number by half.
What is meiosis?
400
100 degrees celcius
What is the boiling point of water?
400
The imaginary force an unrestrained object experiences as it moves around an arc.
What is centrifugal force?
400
A theoretical particle having no mass and no charge that carries the gravitational force.
What is a graviton?
400
The most abundent protein in the human body.
What is collagen?
500
The tendency of a fluid, usually water, to pass through a semipermeable membrane into a solution where the solvent concentration is higher, thus equalizing the concentrations of materials on either side of the membrane.
What is osmosis?
500
The third most common gas found in the air we breathe.
What is Argon?
500
Theoretical framework in which the point-like particles of particle physics are replaced by one-dimensional objects called strings.