GED Science Practice Answer 1
A. experiment; observational study
In an experiment, the researcher directs the behavior of both treatment and control groups. In an observational study, those groups are selected based on their current behavior, and that behavior is not directed by the researcher.
GED Science Practice Answer 2
The question asks how many different orderings, or sequences, of the five crops are possible. This is a permutations question, because order matters. Thus, multiply to find the number of permutations: 5×4×3×2×1 = 120
GED Science Practice Answer 3
This is a combinations question: you are asked for all possible groupings of two out of the six snails, and the order of snails within each group does not matter. Use a table or an organized list to find the number of possible groupings. Name the snails A–F if that makes it easier.
Count the possible pairs: there are 15.
GED Science Practice Answer 4
B. a patient with a painful kidney stone
Because a kidney stone forms in the urinary system, the patient is most likely to be treated by an urologist.
GED Science Practice Answer 5
B. so that each daughter cell receives a complete set of DNA
Cell division produces two daughter cells with genetic material, or DNA, that is identical to that of the parent cell. The DNA must be replicated in the parent cell first so that each daughter cell can receive an exact copy of it.
GED Science Practice Answer 6
C. The continents of North America and Europe are moving apart.
Since the Atlantic Ocean is getting wider, it follows that the continents on either side of the Atlantic are moving further apart.
GED Science Practice Answer 7
D. Pluto should be classified as a dwarf planet.
Choices (A), (B), and (C) are factual details about Pluto. Choice (D) is not a fact but rather a recommendation (that is, an opinion) of the scientists.
GED Science Practice Answer 8
According to the paragraph, glycerin’s boiling point is 190 ̊ greater than water’s boiling point. To find the percentage by which glycerin’s boiling point is greater than that of water, divide the difference between the two substances’ boiling points by the boiling point of water and multiply the quotient by 100%. Thus, 190 / 100 × 100% = 190% . Always read questions carefully. Glycerin’s boiling point is 290 percent of water’s boiling point, but this question asks for the percent by which glycerin’s boiling point is greater than water’s.
GED Science Practice Answer 9
A. A cork in water bobs up and down as waves pass.
The question asks for an example in which something stays in roughly the same place after a wave passes through it. If a cork merely bobs up and down as waves pass, then the cork will be in its original position after the waves stop. Thus, choice (A) is the right example.
GED Science Practice Answer 10
B. Its mass remains the same, and its weight decreases.
The mass of an object doesn’t depend on anything; rather, mass is a property of the object. By contrast, the weight of an object gets smaller as the object gets farther from Earth. So, as a rocket travels away from Earth, its mass won’t change, but its weight will get smaller.
[ KEEP STUDYING: What’s tested on the Science GED Test Section? ]