HISET Cheat Sheet 2026

The 30 highest-yield HISET facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which one of the following waves is an example of a type of wave known as an electromagnetic wave? → gamma wave
2. The Holocaust during World War II resulted in the systematic murder of approximately how many Jewish people? → 6 million
3. When a government spends more money than it collects in revenue in a given year, the result is called a: → Fiscal deficit
4. This map illustrates the relationship between → humans and environment
5. What is equivalent to 3x(2 + 5y)? → 6x + 15xy
6. Which of the following best explains why the ocean absorbs large amounts of solar heat without dramatic temperature changes? → Water has a high specific heat capacity
7. Which of the following best describes the role of decomposers in an ecosystem? → They break down dead organic matter and return nutrients to the soil
8. What is the purpose of the Electoral College in U.S. presidential elections? → To serve as a body of elected representatives who formally cast votes for president
9. What adaptation allows desert cacti to minimize water loss? → Thick waxy cuticle and modified leaves (spines)
10. A right triangle has legs of length 9 and 12. What is the length of the hypotenuse? → 15
11. Which hormone is responsible for stimulating the fight-or-flight response in the human body? → Adrenaline (epinephrine)
12. This passage best illustrates the role of archaeologists in → interpreting evidence
13. How many outfit combinations are possible with six shirts, three slacks, and five ties? → 90
14. A graveyard on a wet winter evening is a typical example of a dark and dismal backdrop that tends to inspire a ____ feeling in readers. → melancholic
15. What happens when an element moves from one physical state to another? → Its chemical state remains the same.
16. The Declaration of Independence, adopted in 1776, was primarily written by: → Thomas Jefferson
17. Which of the following BEST describes a niche in ecology? → The role and position of an organism in its ecosystem
18. A data set contains the values: 3, 8, 5, 12, 7, 9, 5. What is the mode? → 5
19. Which document, signed in 1215, limited the power of the English king and is considered a foundation of democratic rights? → The Magna Carta
20. In an experiment, root tips are treated with a chemical that prevents spindle fiber formation. Which cellular process would be most directly disrupted? → Cell division (mitosis)
21. A segment of a line with two ends. → line segment
22. What is the primary function of the large intestine in the human digestive system? → Absorption of water and formation of solid waste
23. Which of the following associations with the word grave is NOT true? → Warmth
24. The formula h - 15 = 3.2t gives the height h in inches of a plant t weeks after planting. Which is the rate at which the plant's height is increasing? → 3.2 inches per week
25. The Homestead Act of 1862 encouraged westward settlement by: → Granting 160 acres of public land to settlers who farmed it for five years
26. Which continent is the world's largest by land area? → Asia
27. Which of the following is a factor of 450 and multiple of 25? → 75
28. Which event directly triggered the United States' entry into World War II? → Japan's attack on Pearl Harbor
29. Which of the following lists is in chronological order? → Revolutionary War, Great Depression, first moon landing
30. What type of energy is stored in the chemical bonds of food? → Chemical potential energy