FREE Iowa Test of Basic Skills (ITBS) 8th Grade Questions and Answers
Which line has a mistake in the spelling?
The correct spelling of the word should be "heroes," not "heros."
Get the LCM of 224 and 280.
Step 1: Prime factorization of 224
224 = 2 × 2 × 2 × 2 × 2 × 7 = 2^5 × 7
Step 2: Prime factorization of 280
280 = 2 × 2 × 2 × 5 × 7 = 2^3 × 5 × 7
Step 3: Identify common and uncommon prime factors and their highest powers:
Common factors: 2^3 (since it is the highest power that appears in both)
Uncommon factors: 2^2 (only appears in 224) and 5 (only appears in 280) and 7 (appears in both)
Step 4: Multiply all the common and uncommon prime factors together:
LCM = 2^3 × 2^2 × 5 × 7 = 8 × 4 × 5 × 7 = 1120
Which word has the incorrect spelling?
The correct spelling of the word is "disciplinary."
A cube has a 725-cubic-centimeter volume. Which of the following comes closest to describing how long each cube edge is?
Edge length = ∛(Volume)
Let's calculate the length of each cube edge using the given volume of 725 cubic centimeters:
Edge length = ∛(725) ≈ 9.03 centimeters
Rounded to the nearest whole number, the length of each cube edge is approximately 9 centimeters.
So, the option "9 centimeters" comes closest to describing how long each cube edge is.
What among the following leads to extinction?
Extinction is caused by numerous factors. Extinction is brought on by things like agriculture, habitat fragmentation, and deforestation. Agricultural practices release chemicals into the ecosystem, which lead to extinction. Because it alters an animal's environment, habitat fragmentation contributes to extinction. Habitat fragmentation typically results from development tearing apart an animal's natural habitat. Because deforestation destroys animal habitats, it leads to extinction. Cutting down forests is referred to as deforestation.
Some individuals dislike using computers. They believe it to be too difficult, and they frequently lose it. Don't they understand how much time and effort computers save us? These computer-haters must be perplexed. What premise does this sentence rest on?
The paragraph seems to present a viewpoint that favors the use of computers and suggests that those who don't like them are mistaken or confused. It implies that using computers is beneficial and that people should recognize their advantages, which leads to the assumption that everyone should use and appreciate computers.
A species is considered to have _________ when it becomes more adapted to its surroundings.
The proper response is adapted because adaptation is the process by which a species becomes more suited to its environment. A species is said to have adapted when it becomes more compatible with its surroundings.
Christine noticed the stunning, fresh, white snow that was covering the ground outside as she peered out of her bedroom window. She hurriedly put on her clothes and dashed outside to build the first snowman of the season. "Remember to bring your gloves! She heard her mother say, "Your fingers will freeze!" as the door shut. Don't require them! Christine shouted, "No time!" as she leaped into the snow. Christine spent around five minutes building the snowman with her bare hands before she noticed that her fingers were growing painfully chilly. What is most likely Christine's next move?
The paragraph indicates that Christine's fingers are becoming painfully chilly after building the snowman with her bare hands. It is reasonable to assume that she will go back into the house to get her gloves in order to protect her hands from the cold and continue building the snowman comfortably.
What phrase use a superlative adverb?
In this sentence, "most carefully" is the superlative adverb. It indicates that out of all the students in the class, Grace is the one who works with the highest degree of care. The superlative form of an adverb is used to compare three or more things or actions, indicating the highest degree or intensity.
The man had changed. The plane that flew past without saving him had utterly altered him. He was no longer the same and would never again be. The new Peter was stronger and would not give up, unlike the weak old Peter who needed to survive. How has Peter changed, in your opinion?
Peter has changed to become stronger, more aware, and careful. The paragraph suggests that the experience of the plane flying past without saving him has had a significant impact on Peter, leading to a transformation in his character. The new Peter is described as someone who will not give up, in contrast to the weak old Peter who merely sought survival. This indicates a change towards resilience and determination, making him stronger and more cautious in facing challenges.
8 is reduced by adding a number, n, and the product of 5. Which expression best encapsulates this assertion?
The expression that represents the statement "The sum of a number, n, and 5 is subtracted from 8" is: 8 - (n + 5). This expression means that you start with the number 8 and then subtract the sum of "n" and 5 from it.
Which of the following could be used in a sentence as an adjective?
The word "inspirational" can function as an adjective in a sentence. For example: "She gave an inspirational speech that motivated everyone in the room." In this sentence, "inspirational" describes the type of speech, functioning as an adjective.
What is considered to be an error or alteration in an organism's DNA?
A mistake or alteration in an organism's DNA is known as a mutation.
What is the process that enables organisms to survive and pass on their genetic features when they are most compatible with their environment.
Natural Selection is the mechanism that allows organisms with the most advantageous genetic features to survive and reproduce.
Which of the following is NOT written properly?
In this sentence, "cautiously" is the correct adverb form to modify the verb "drives." Adverbs are used to describe verbs and often end in "-ly" to form their adverbial form.
Which of the ensuing figures makes a perfect square?
Since the square root of 25 is 5, and 5 is an integer, we can conclude that 25 is a perfect square.