Chemistry
Biology
Earth Science
Astronomy
Engineering
100

This is the pH of a 0.01 M solution of hydrochloric acid (HCl)

What is 2?

100

The organelle where the electron transport chain and ATP synthase are located in eukaryotes.

What is the inner mitochondrial membrane?

100

The most abundant element in Earth’s crust.

What is oxygen?

100

The galaxy that contains our solar system.

What is the Milky Way?

100

The primary function of a capacitor in an electrical circuit.

What is storing electrical charge?

200

The gas law represented by PV = nRT.

What is the Ideal Gas Law?

200

The stage of the cell cycle in which chromosomes condense and the mitotic spindle begins to form.

What is prophase?

200

A fault characterized by horizontal shearing motion between blocks of rock.

What is a strike-slip fault?

200

The most abundant element in the Sun.

What is hydrogen?

200

The semiconductor material most frequently used in computer chips.

What is silicon?

300

The intermolecular force responsible for the unusually high boiling point of water compared to other group 16 hydrides.

What is hydrogen bonding?

300

The process by which genetic information is transferred from mRNA to a growing polypeptide chain.

What is translation?

300

The atmospheric layer that contains most of Earth’s ozone.

What is the stratosphere?

300

The point in Earth’s orbit where it is closest to the Sun.

What is perihelion?

300

The mechanical advantage gained from using a simple pulley system.

What is reduced input force?

400

The type of reaction in which a metal is dissolved in aqueous acid because the metal acts as this type of agent.

What is a reducing agent?

400

The type of selection that favors individuals with intermediate phenotypes over those with extreme traits.

What is stabilizing selection?

400

The primary reason Earth experiences seasons.

What is Earth’s 23.5° axial tilt?

400

The effect that causes light from receding galaxies to shift toward longer wavelengths.

What is redshift?

400

Joining materials by melting them together using high heat.

What is welding?

500

The point in a titration where the moles of acid equal the moles of base.

What is the equivalence point?

500

The model describing how enzymes change shape slightly to bind substrates more effectively.

What is the induced fit model?

500

The breakdown of rocks through physical forces like wind, water, or thermal expansion.

What is mechanical weathering?

500

The stage in stellar evolution where a star has exhausted its core hydrogen and begins burning hydrogen in a shell around the core, causing it to expand dramatically.

What is the red giant phase?

500

A bridge type in which the deck hangs from cables supported by tall towers.

What is a suspension bridge?