ASVAB General Science Practice Questions

If you’re planning on taking the ASVAB General Science Technical Subtest, check out these practice questions!

Question 1
In which level of the atmosphere does all weather take place?
A. troposphere
B. stratosphere
C. mesosphere
D. thermosphere

A: The troposphere is the lowest level of the atmosphere and where all weather affecting Earth takes place. This is the level where clouds form and from where precipitation falls.

Question 2
A net force of 15 N is applied to an object that starts at rest and accelerates to a velocity of 12 m/s in 4 seconds. What is the mass of the object?
A. 3 kg
B. 5 kg
C. 12 kg
D. 15 kg

B: Use Newton’s second law of motion, F = ma, to solve this problem. The object reached a velocity of 12 m/s in 4 seconds, so the acceleration was 12/4 = 3 m/sec^2. 15 = m(3), so m = 15/3 = 5 kg.

Question 3
Our lungs convey __________ to blood cells and receive __________ and __________ from blood cells.
A. oxygen, carbon dioxide, water
B. oxygen, carbon dioxide, nitrogen
C. carbon dioxide, oxygen, water
D. nitrogen, carbon dioxide, oxygen

A: Blood carries the oxygen that cells need to function to the cells and picks up the carbon dioxide and water that they generate, so the lungs have to support that process by supplying oxygen to the blood and carrying away carbon dioxide and water.

Question 4
Which of the following best describes the difference between eukaryotic cells and prokaryotic cells?
A. Prokaryotic cells do not have nuclei.
B. Prokaryotic cells are only found in plants.
C. Eukaryotic cells are only found in plants.
D. Eukaryotic cells do not have nuclei.

A: Prokaryotic cells, such as bacteria, do not have nuclei. Their genetic material is contained within the main part of the cell body. Eukaryotic cells do contain nuclei where all genetic material is contained. Eukaryotic cells are plant, animal, fungi, and protist cells.

Question 5
Which of the following activities results in a chemical change?
A. mixing salt and sugar
B. drying wet clothes
C. boiling a pot of water
D. burning pieces of wood

D: Mixing salt and sugar is a physical change. When mixed together, the salt and sugar retain their molecular makeup. Drying wet clothes is also a physical change. When clothes are dried, water molecules evaporate, becoming a gas. The clothes and water molecules remain chemically unchanged. When boiling a pot of water, once again, liquid water molecules move into the gas phase, but there is no change in the chemical composition of the molecules. Finally, burning wood is a chemical change, because the molecules in the wood are converted into new molecules that are different than the original.

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