Life Science
Physical Science
Earth Science
American History
Civics & Government
100

This organ in your chest pumps blood all day long.

What is the heart?

100

A push or pull that can make something move is called a _____.

What is a force?

100

Rain, snow, sleet, and hail are all kinds of _____.

What is precipitation?

100

The first ten amendments to the Constitution are called the _____.

What is the Bill of Rights?

100

The U.S. governing document that begins “We the People” is the _____.

What is the Constitution of the United States?


200

During photosynthesis, plants take in this gas from the air to help make sugar.

What is carbon dioxide?

200

A household device that turns chemical energy into electrical energy is a _____.

What is a battery?

200

The lowest layer of the atmosphere—where clouds and weather form—is the _____.

What is the troposphere?

200

The conflict between Northern and Southern states from 1861‑1865 is known as the _____.

What was the Civil War?

200

Each U.S. state elects this many Senators.

What is two?

300

A cross of Bb × bb yields what percent of offspring showing the recessive trait?

What is 50 %?

300

A bike rides 30 km in 2 h.  What is its average speed?

What is 15 km/h?

300

Which earthquake wave (P or S) cannot travel through Earth’s liquid outer core?

What is an S‑wave?

300

Which 1803 purchase from France doubled the size of the United States?

What was the Louisiana Purchase?

300

If both the President and Vice President can no longer serve, who becomes President?

Who is the Speaker of the House?

400

When blood glucose rises after a meal, the pancreas releases this hormone to lower it.

What is insulin?

400

Elements in the same vertical column of the periodic table form a(n) _____, sharing valence‑electron patterns.

What is a group (or family)?

400

Magnetic “stripes” of reversed polarity in seafloor basalts on both sides of mid‑ocean ridges provided key evidence for this geologic theory.

What is seafloor spreading / plate tectonics?

400

The 1848 Seneca Falls Convention issued a declaration demanding rights for this group.

Who were women?

400

The constitutional clause that makes federal law the “supreme law of the land” over state laws is called the _____.

What is the Supremacy Clause?

500

Variation in Galápagos finch beaks is an example of this evolutionary process in which one ancestral species diversifies to fill different niches.

What is adaptation?

500

The measure of disorder that must increase in any closed‑system energy transformation is called _____.

What is entropy?

500

After shedding its outer layers, a Sun‑like star becomes this dense, Earth‑sized stellar remnant.

What is a white dwarf?

500

The Strategic Arms Limitation Talks (SALT) took place during what era of U.S.–Soviet tension?

What was the Cold War?

500

In Citizens United v. FEC (2010), the Court said limits on corporate independent spending violated protections found in which amendment?

What is the First Amendment?