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HiSET Practice Questions

HiSET Science Practice Questions

HiSET Science Subtest — Looking for a solid HiSET science practice test to prep with? You're in the right place. These free sample questions cover life science, physical science, and earth science - the three core areas you'll actually see on the real thing. Each question comes with a detailed explanation so you're not just guessing and checking, but actually learning the reasoning behind each answer. Whether biology trips you up or physics makes your head spin, practicing with realistic questions is probably the single best way to build confidence before test day.

50
Total Questions
80 minutes
Time Limit
8 out of 20 (scaled score)
Passing Score
$10-$25 per subtest (varies by state)
Registration Fee

Free Sample Questions

Here are 5 free sample questions from our full bank of 350+ HiSET Science practice questions. Try them out below — click "Show Answer" to reveal the correct response and explanation.

1

In a forest ecosystem, a population of rabbits is the primary food source for foxes. If a disease significantly reduces the rabbit population, what is the most likely immediate effect on the fox population?

AA) The fox population will increase due to less competition for other food sources
BB) The fox population will decrease due to a reduced food supply
CC) The fox population will remain unchanged because foxes can photosynthesize
DD) The fox population will migrate to a marine ecosystem
2

An atom has 11 protons, 12 neutrons, and 11 electrons. Which element does this atom represent, and what is its mass number?

AA) Sodium (Na), mass number 23
BB) Magnesium (Mg), mass number 23
CC) Sodium (Na), mass number 11
DD) Neon (Ne), mass number 22
3

A 2-kilogram ball is rolling along a flat surface at 3 meters per second. What is the kinetic energy of the ball?

AA) 6 joules
BB) 9 joules
CC) 12 joules
DD) 18 joules
4

Which layer of Earth's atmosphere contains the ozone layer that protects living organisms from harmful ultraviolet radiation?

AA) Troposphere
BB) Stratosphere
CC) Mesosphere
DD) Thermosphere
5

A scientist tested the effect of different fertilizers on plant growth. The results are shown below: Fertilizer A: Average height 22 cm (10 plants) Fertilizer B: Average height 31 cm (10 plants) No fertilizer: Average height 15 cm (10 plants) All plants received the same amount of water and sunlight over 30 days. Based on these results, which conclusion is best supported?

AA) Fertilizer B caused plants to grow taller than Fertilizer A or no fertilizer
BB) Fertilizer A is toxic to plants
CC) All fertilizers produce the same results
DD) Plants do not need sunlight to grow

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About the HiSET Science

Format & Structure

Total Questions
50
Time Limit
80 minutes
Format
Multiple choice

Scoring & Cost

Passing Score
8 out of 20 (scaled score)
Registration Fee
$10-$25 per subtest (varies by state)

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Frequently Asked Questions

What is the HiSET Science subtest?

The HiSET Science subtest is one of five sections on the High School Equivalency Test (HiSET). It measures your ability to understand, interpret, and apply scientific concepts and reasoning. You don't need to memorize tons of facts - the test focuses more on your ability to read scientific information and draw conclusions from data, experiments, and passages.

How many questions are on the HiSET Science test?

The HiSET Science subtest contains 50 multiple-choice questions. You'll have 80 minutes to complete all of them, which works out to about a minute and a half per question. Some questions are standalone, while others come in sets based on a shared passage, chart, or experiment description.

What topics are covered on the HiSET Science test?

The test covers three main content areas: Life Science (biology and ecology), Physical Science (chemistry and physics), and Earth Science (geology, weather, and space science). Roughly 40% of the questions deal with life science, 40% with physical science, and 20% with earth science. You'll also need strong science reasoning skills - things like interpreting graphs, evaluating experiments, and drawing conclusions from data.

What score do I need to pass the HiSET Science subtest?

You need a minimum scaled score of 8 out of 20 to pass the HiSET Science subtest. Keep in mind that you also need at least a 2 out of 6 on the essay portion of the Language Arts - Writing subtest, and a combined total of at least 45 across all five subtests. So while 8 is the minimum per subtest, scoring higher on science can help offset a weaker score elsewhere.

Can I use a calculator on the HiSET Science test?

Yes, you're provided with an on-screen calculator for the HiSET Science subtest. However, most science questions don't require heavy calculations - they focus more on reasoning and interpretation. When math does come up, it's usually straightforward stuff like reading a graph or doing basic arithmetic. Don't rely too heavily on the calculator; understanding the science concepts matters way more.

How should I study for HiSET Science?

Start by taking a practice test to figure out where your gaps are. Then focus your study time on weak areas - whether that's biology, chemistry, physics, or earth science. Practice reading scientific passages and interpreting charts and graphs, since that's a huge part of the actual test. You don't need to memorize a textbook. Instead, focus on understanding key concepts and building your ability to reason through scientific scenarios. A solid 3-4 week study plan usually does the trick for most people.

How long do I have for the HiSET Science subtest?

You get 80 minutes to answer all 50 questions on the HiSET Science subtest. That's roughly 1 minute and 36 seconds per question. If you come across a tough one, don't burn too much time on it - mark it and move on. You can always come back to it later if time allows. Pacing yourself is honestly one of the most underrated strategies for this subtest.

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