GED Science Practice Test 1

This is the first of our free GED Science practice tests. The new 2014 GED Science test has challenging questions that will require you to read complex scientific texts, evaluate charts and graphs, and use evidence to make inferences. To prepare for this you will want to work through as many practice questions as possible. These online practice questions include answers and detailed explanations. Start your test prep now with our GED Science practice test.

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Question 1
Animals that feed exclusively on plants are called:

Primary Consumers
Secondary Consumers
Tertiary Consumers
Primary Producers
Question 1 Explanation: 
In an ecological food chain, primary producers are those that photosynthesize and utilize sunlight as their energy source; these are almost entirely plants. Primary consumers attain their energy from primary producers. Secondary consumers feed upon primary consumers, and tertiary consumers feed upon primary and secondary consumers.
Question 2

Which of the following is true about the frog?

It is a member of the salamandridae family.
It is a type of amphibian.
It is a non-vertebrate.
It is closer to most tetrapods than most newts.
Question 2 Explanation: 
First assess the diagram provided. The circle, which encloses each of the other shapes, shows that tetrapods, frogs, and newts are all vertebrates. The triangle, which contains the rectangle, shows that frogs and newts are amphibians. The rectangle shows that newts are salamandridae.

Next, assess the answer choices.

The frog is not a part of the salamandridae family, as it is not inside of the rectangle.

The frog is inside of the vertebrate circle, so it is not a non-vertebrate.

It is not possible to conclude that it is closer to most tetrapods than most newts given the presentation of the information.

The frog is a type of amphibian due to its spot within the amphibian triangle.
Question 3

Which statement can be inferred about amphibians?

All amphibians are salamandridae, but not all salamandridae are amphibians.
Some amphibians are vertebrates, but not all amphibians are vertebrates.
Some salamandridae are amphibians, but not all amphibians are tetrapods.
All amphibians are vertebrates, but not all vertebrates are amphibians.
Question 3 Explanation: 
Use the diagram presented to assess each answer choice.

Not all amphibians are salamandridae, as the rectangle is inside of the triangle. Also, all salamandridae are amphibians because the rectangle is completely inside of the triangle.

All amphibians are vertebrates, not just some, so this answer is false.

All amphibians are tetrapods, so this answer is false.

All amphibians are vertebrates, as the triangle is inside of the circle, but not all vertebrates are amphibians, as the circle is not inside of the triangle. This is the only correct conclusion.
Question 4
Information about the composition of ocean water is listed in the table below.

Ocean comp

Which statement is supported by the data in this table?

There is more potassium in ocean water than magnesium.
If bromine was more highly concentrated, then it could be extracted for use in disinfectants.
There is more chlorine in ocean water than sodium and sulfur combined.
Carbon plays a small, but important role in the ecosystem of the ocean.
Question 4 Explanation: 
Use the presented information to evaluate each answer choice.

A direct comparison between potassium and magnesium (0.038% vs. 0.135%) shows that there is more magnesium in the ocean than potassium.

The use of bromine as a disinfectant is not related to the data presented.

Likewise, the importance of Carbon’s role in the ocean is not related to the data presented.

The amount of chlorine (1.9%) is greater than sodium and sulfur combined (0.0885%+1.05%=1.1385%).
Question 5

The square above is based on the eye color of two parents. One of the parents has brown eyes and carries the recessive gene for green eyes (a). What is the probability that a biological child of these parents will have brown eyes?

Question 5 Explanation: 
It is given that the recessive gene for green eyes is the allele ‘a,’ and that one parent has brown eyes while also carrying the recessive green eye allele. This means that the dominant gene (A) gives brown eyes. Inspection of the square shows that half of the children will have green eyes (aa), and half of the children will have brown eyes (Aa).
Question 6

What process is illustrated in the diagram above?

Question 6 Explanation: 
The processes of meiosis and mitosis both involve cellular reproduction. The major difference between the two is that mitosis produces daughter cells that are identical to the parent cells. Meiosis results in cells that are not identical to the parent cells. In the diagram, it can be seen that the cells produced do not match the cell at the start. The diagram shows the process of meiosis.
Question 7
Humans can breed plants and animals to have useful traits. By selecting which animals are allowed to reproduce, humans can influence an organism’s genotype. What name did Darwin give to this kind of change in organisms?

natural selection
artificial selection
survival of the fittest
Question 7 Explanation: 
Darwin used the term artificial selection to distinguish this process from natural selection. Natural selection is the process by which living things with beneficial traits produce the greatest number of offspring. Natural selection results in changes in the traits of living things over time, as those organisms most fit for reproduction are more likely to pass on their genes than less fit organisms. Artificial selection, on the other hand, is the reproduction of organisms with beneficial traits resulting from the influence of humans. ‘Survival of the fittest’ is an expression describing natural selection, and hybridism describes an organism of mixed origin, not necessarily something bred to exhibit useful traits.
Question 8
There are two types of planets in the solar system: Terrestrial and Jovian. Terrestrial planets are also called inner planets or rocky planets. They are smaller in size, higher in density, made mostly of rock and metal, closest to the sun, and have few moons and no rings. Jovian planets are also known as the outer gas giants. They are larger in size, lower in density, made mostly of gasses, further from the sun, and often have ring systems and many moons. There is also a sub classification of outer gas giants known as ice giants. Ice giants are smaller in size, smaller in mass, have lower amounts of gasses, and more rock and ice. Neptune and Uranus are ice giants.
What can be inferred from this passage about the differences between Neptune and Saturn?

Saturn is smaller than Neptune.
Saturn is rockier than Neptune.
Neptune is icier than Saturn.
Neptune has more moons than Saturn.
Question 8 Explanation: 
Recall that Saturn, the sixth planet from the sun, possesses rings. From the description provided, it is clear that Saturn would be considered a Jovian planet. The passage also states that Neptune is an ice giant, a subtype of a Jovian planet. The passage suggests that ice giants have all the characteristics of Jovian planets except that they are smaller in size, smaller in mass, have less gas, more rocks, and more ice. It can then be inferred that Neptune is smaller than Saturn, rockier than Saturn and icier than Saturn.
Question 9
Renewable Energy

What percentage of total energy consumption is produced by biofuels?

Question 9 Explanation: 
The pie graph indicates that 9% of all energy comes from renewable sources. This 9% is then divided into individual categories. Biofuels represent 21% of all renewable energy. The figure shows that 21% of the 9% of the total represents the consumption produced by biofuels. To calculate the percentage of total energy consumption represented by biofuels, find 21% of 9% by multiplying them together:

21% * 9%
= 0.21 * 0.09
= 0.0189
= 1.89%.
Question 10

What is the mean time, in seconds, for all of the bicycle racers?

Question 10 Explanation: 
The arithmetic mean, also known as the average, is a way to describe the center of a data set. It is calculated by summing the data points of a data set and dividing by the total number of data points in the set. In this case, the average time, which contains 6 data points, is the data set. Add together the individual times and divide by 6 to calculate the mean time:

Mean = (103 + 110 + 116 + 125 + 116 + 144) ÷ 6
Mean = 714 ÷ 6
Mean = 119
Question 11
The birds in the picture below are able to pick out food from the fur of the deer. The deer will not attack the birds. In fact, the deer knowingly lets the birds rest on it.

What is the name describing the relationship between the birds and the deer?

Question 11 Explanation: 
Symbiosis describes a close relationship between organisms of different species in which at least one of the organisms benefits. The other organism may also benefit, or it may be unaffected or harmed by the relationship.
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