So, are you ready to test the waters? Take this practice quiz and judge your preparation level before diving into deeper study.
All test questions are in a multiple-choice format, with one correct answer and three incorrect options. The following are samples of the types of questions that may appear on the exam.
WarningPlease do keep in mind that we can’t guarantee the accuracy of this quiz, so we do recommend you also run through a full-length practice exam. We’ll recommend some good options in the resources section at the bottom of this page.
Question 1: FOR ALLOPATRIC SPECIATION, WHICH OF THE FOLLOWING CONDITION DISTINGUISHES IT FROM SYMPATRIC SPECIATION?
a) Genetic mutation
b) Natural selection
c) Geographical isolation
d) All of the above
This question relates to evolution. Allotapric speciation happens when organisms are
geographically isolated from each other and over time mutation and genetic drift causes them to
evolve into different species. In sympatric speciation, geographical separation does not occur.
Mutation and natural selection is part of both processes.
Question 2: WHICH OF THE FOLLOWING IS PRESENT IN A PLANT CELL BUT NOT AN ANIMAL CELL?
a) Cell wall
b) Cell membrane
That was an easy one to boost your confidence! Cell wall is fully permeable and present in plant
cells only. It surrounds the cell and helps in maintaining it’s shape. It is made of cellulose and
quite rigid, thus helps in maintaining turgidity of the cell.
Question 3: WHEN PLANT OVARIES MATURE, THEY FORM…
Mature ovaries form the fruit. Embryo is contained inside the seeds. Seeds are inside the fruit.
Under the right conditions seeds germinate.
Question 4: WHICH ONE OF THE FOLLOWING IS STORED IN THE ADIPOSE TISSUE?
Adipose tissues store fat. They are located mainly under the skin and around the internal organs.
It provides cushion to the organs and thermal insulation. Fat is stored as energy reserve.
Question 5: AUTOTROPHS ARE…
a) Primary producers
b) Primary consumers
c) Secondary consumers
d) Tertiary consumers
Another easy one! This question is related to ecology and trophic level of the autotrophs.
Autotrophs are producers and have the ability of producing complex organic substances like carbohydrates from simple elements. They are primary producers and they produce their own food. Green algae are an example of an autotrophs.
Question 6: ISOTOPES OF AN ELEMENT HAVE DIFFERENT NUMBERS OF:
Isotopes are atoms of the same elements with same atomic number but different mass number.
Same atomic number means that number of protons is the same. However, number of neutrons vary, thus varying the mass number as the mass number is the sum of number of protons and number of neutrons. Isotopes have similar chemical properties as their atomic number is the same. Their physical properties vary due to difference in mass.
Question 7: NOBEL GASES ARE INERT GASES AND DO NOT REACT EASILY. THIS IS SO BECAUSE:
a) They have 8 electrons in the valence shell
b) All gases are inert
c) They are diatomic
d) Their number of neutrons is equal to number of protons
Atoms with eight number of electrons in their valence shell are stable. All other atoms have the tendency to try to achieve this state. Atoms that do not have 8 electrons in their valence shell undergo chemical reactions to achieve this state. Metals with one two or three valence electrons form positive ions by losing these electrons. When they lose electrons of their valence shell, it becomes empty. Next shell now becomes the valence shell and contains eight electrons. Nonmetals such as chlorine need to gain electrons to complete their valence shells. They become negative ions by gaining electrons. These positive negative ions form covalent bonds. Nonmetals also form the covalent bond in which atoms share their valence electrons with each other in such a way that valence electrons of every element become eight! Since noble gases already have eight electrons in their outer shell, they do not need to undergo any chemical reaction. They are monoatomic gases.
Question 8: HEAT TRANSFER IN SOLIDS TAKE PLACE BY:
d) Convection and radiation
Heat transfer in solids takes place by conduction. Particles of solids vibrate at their fix position and transfer heat through vibrations. They do not leave their place. Molecules of liquids and gases transfer heat by actual movement of particles. This one was pretty easy, wasn’t it? But you should better prepare yourself for harder questions of the exams by studying deeply the concepts of thermodynamics.
Question 9: ELECTRIC CHARGE IS MEASURED IN:
Charge is measured in coulombs. Ampere is the unit of current and it is the rate of flow of
electric charge. Voltage is measured in volts and resistance in ohms.
Question 10: ASSUMING THE BIG BANG THEORY, WHAT CAN WE SAY ABOUT THE UNIVERSE TODAY?
The big bang theory posits that our universe originated in an explosion. Accordingly it is thought that it is still expanding even today.
More CLEP Study Resources
Looking for a study guide to fill a couple gaps, or just want a full length practice exam? You can find a few of my favorite resources below. Note that some of the links are affiliate – meaning I’ll make a few dollars if you purchase, but I’m only sharing those resources that were genuinely helpful during my own CLEP journey.
Official CLEP Study Guide: It’s quite short on the study side of things, but this is the go-to practice test bank. I don’t think I’ve done a single CLEP test without taking the practice test in this book first.
REA CLEP Natural Sciences: I’m not huge on reading, but this book series is fantastic if you’re into that kind of thing. It also includes some nifty online practice tests, though I always found the official practice tests more reassuring.
InstantCert Academy: The website looks like it was made before the internet, but it’s legitimately the single most useful study guide I’ve found. Basically it’s a series of flashcards that help you learn about Natural Sciences in a fast paced and fun way.
Plenty of other resources exist – just do a quick internet search – but these are the three that I’ve personally found the most helpful back when I did CLEP.