Show:
Earth & Space
Life Science
Physics & Energy
Matter & Chemistry
Scientific Method & Tools
100

  • What is the hardest mineral on the Mohs hardness scale?

  •  Diamond

100

  • Which body system transmits electrical signals to relay messages throughout the entire body?

  • Nervous system

100

  • As a skier goes downhill, potential energy is primarily converted into what type of energy?

  • Kinetic energy

100

  •  What state of matter has a definite volume but takes the shape of its container?

  • Liquid

100

  • What laboratory instrument is used to measure liquid volume accurately?

  • Graduated cylinder

200

  • What type of rock is formed from the cooling and solidification of magma or lava?

  • Igneous rock

200

  • What organelle is known as the "powerhouse of the cell" because it generates most of the chemical energy?

  •  Mitochondria

200

  • What is Newton's First Law of Motion often referred to as?

  • The Law of Inertia

200

  • What subatomic particle carries a negative charge and orbits the nucleus of an atom?

  • Electron

200

  • What variable in a scientific experiment is deliberately changed or manipulated by the scientist?

  • Independent variable

300

  • What celestial event occurs when the Earth passes directly between the Sun and the Moon?

Lunar Eclipse

300

  • What is the primary product of photosynthesis that plants store for energy?

Glucose (Sugar)

300

  • What physical quantity is calculated by dividing total distance traveled by total time elapsed?

  • Average Speed

300

  • On the pH scale, any solution with a pH value less than 7 is considered what?

  • Acidic (an acid)

300

  • What is a testable, proposed explanation for a scientific phenomenon based on prior observation called?

  • Hypothesis

400

  • Which layer of the Earth's atmosphere is closest to the surface and contains most of our weather?

  • Troposphere

400

  • What type of biological relationship exists when both organisms benefit from the interaction?

  •  Mutualism

400

  • What force opposes the relative motion of two surfaces sliding past each other?

  • Friction

400

  • What physical phase change occurs when a substance converts directly from a solid to a gas without becoming a liquid?

  • Sublimation

400

  • What unit of measurement in the International System of Units (SI) is used to measure mass?

  • Kilogram (or gram)

500

  • What boundary type is created when two tectonic plates slide horizontally past one another (e.g., the San Andreas Fault)?

  • Transform boundary

500

  • What allele combination describes an organism that has two identical dominant alleles for a single trait (e.g., BB)?

Homozygous dominant

500

  • If an object has a mass of 10 kg and accelerates at 3 m/s², what net force is acting on it in Newtons?

30 N (F=ma)

500


  • What is the term for a substance that increases the rate of a chemical reaction without undergoing any permanent chemical change itself?

  •  Catalyst

500

  •  What type of graph is best suited for showing how a continuous variable changes over time?

  • Line graph