New Mexico NM-ASR Science Grade 8 Practice Questions - New Mexico Assessment of Science Readiness - Science, Grade 8 Exam - New Mexico NM-ASR Science Grade 8 Practice Questions - New Mexico Assessment of Science Readiness

Question 1

A student builds a molecular model of water (H2O) using balls for atoms. Which statement best describes what the model must show to represent the molecule correctly?

Two hydrogen atoms bonded to one oxygen atom in a bent arrangement One hydrogen atom bonded to two oxygen atoms in a straight line Two oxygen atoms bonded to one hydrogen atom in a triangular arrangement Three identical atoms joined in a straight line

Correct Answer:

Two hydrogen atoms bonded to one oxygen atom in a bent arrangement

Question 2

In a ball-and-stick model of methane (CH4), how should the atoms be arranged to best represent the molecule?

One carbon atom in the center with four hydrogen atoms evenly spaced around it Four carbon atoms in a chain with one hydrogen at each end One hydrogen atom in the center with four carbon atoms around it Two carbon atoms and two hydrogen atoms in a square

Correct Answer:

One carbon atom in the center with four hydrogen atoms evenly spaced around it

Question 3

Which observation provides the best evidence that a solid sample of a substance is a pure element rather than a compound?

All atoms in the sample are the same type and it cannot be broken down by chemical means The sample conducts electricity when dissolved in water The sample has a high melting point The sample is made of more than one kind of atom chemically combined

Correct Answer:

All atoms in the sample are the same type and it cannot be broken down by chemical means

Question 4

A student is given two white powders. Which set of properties would be most useful for distinguishing the two substances?

Solubility in water, melting point, and density Color only Mass of the sample only The container each was stored in

Correct Answer:

Solubility in water, melting point, and density

Question 5

A sealed balloon contains helium gas. If the balloon is moved from a warm room into a cold freezer, what happens to the motion of the helium atoms?

The atoms slow down because the average kinetic energy of the particles decreases The atoms speed up because cold increases particle motion The atoms stop moving entirely The atoms move faster because the gas contracts

Correct Answer:

The atoms slow down because the average kinetic energy of the particles decreases

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About this Exam

Prepare with the New Mexico NM-ASR Science Grade 8 Practice Questions - New Mexico Assessment of Science Readiness - Science, Grade 8 Exam practice quiz. This question bank includes 100 questions covering student, wave, model, describes, and explains. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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New Mexico NM-ASR Science Grade 8 Practice Questions - New Mexico Assessment of Science Readiness - Science, Grade 8 Exam

This practice set contains 100 questions from the matching question bank and focuses on student, wave, model, describes, and explains. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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New Mexico NM-ASR Science Grade 8 Practice Questions - New Mexico Assessment of Science Readiness - Science, Grade 8 Exam

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