Physics
Biology
Chemistry
Earth/Space Science
General Science
& History
100

This vector quantity is defined as the rate of change of velocity.

What is acceleration?

100

This structure regulates what enters and exits a cell.

What is the cell membrane (plasma membrane)?

100

This subatomic particle, found in the nucleus, has no electrical charge.

What is a neutron?

100

This part of the water cycle occurs when water vapor cools and changes back into liquid droplets, forming clouds.

What is condensation?

100

In a controlled experiment, this group receives no treatment and serves as a baseline for comparison.

What is the control group?
200

This law related force, mass, and acceleration.

What is Newton's Second Law of Motion (F = ma)?

200

This process, occurring in mitochondria, converts glucose into ATP using oxygen.

What is cellular (aerobic) respiration?

200

This term refers to a substance that speeds up a chemical reaction without being consumed in the process.

What is a catalyst?

200

This layer of the Earth lies directly beneath the crust.

What is the mantle?

200

This scientist's experiments with pea plants established the foundational laws of genetic inheritance.

Who is Gregor Mendel?

300

This term describes the point in a system where forces are balanced and no net motion occurs.

What is equilibrium?

300

This organelle uses chlorophyll to capture light energy and convert it into chemical energy during photosynthesis.

What is the chloroplast?

300

This type of chemical reaction releases energy, usually in the form of heat, to its surroundings.

What is an exothermic reaction?

300

This type of rock forms when magma or lava cools and solidifies.

What is igneous rock?

300

This scientist developed the periodic table, arranging elements by increasing atomic mass and recurring properties.

Who is Dmitri Mendeleev?

400

This type of potential energy is stored in objects that are stretched or compressed.

What is elastic potential energy?

400

This process describes how enzymes speed up chemical reactions by lowering activation energy.

What is catalysis?

400

This term describes the amount of energy needed to remove an electron from an atom.

What is ionization energy?

400

This planet is home to Olympus Mons, the largest known volcano in the solar system.

What is Mars?

400

This is Darwin's proposed mechanism of evolution, in which organisms best suited to their environment are more likely to survive and reproduce.

What is natural selection?

500

This quantity is calculated by multiplying an object's mass by its velocity, and describes how difficult it is to stop a moving object.

What is momentum?

500

This type of cell division produces four genetically unique daughter cells with half the chromosome number of the parent cell.

What is meiosis?

500

This process describes how atoms in an unstable nucleus lose energy by emitting particles or radiation.

What is radioactive decay?

500

This term describes the explosive death of a massive star, which can leave behind a neutron star or black hole.

What is a supernova?

500

This physicist proposed that light behaves as both a particle and a wave to explain the photoelectric effect.

Who is Albert Einstein?