MCAS Science Review

A student makes a ball-and-stick model of a propane molecule, as shown below. The black balls represent carbon atoms, and the white balls represent hydrogen atoms.

Based on the model, what is the chemical formula of propane?

• C₃H₈

• C₃H₁₀

• 3CH

• 3CH₈

Tags

NGSS.MS-PS1-1

Which of the following statements describes what most likely occurs when thermal energy is removed from a liquid?

• The mass of the liquid

  decreases.

• The temperature of the liquid

  decreases.

• The molecules of the liquid

  move faster.

• The molecules of the liquid

  stop moving

Tags

NGSS.MS-PS1-4

The freezing point of nitrous oxide is -91°C. Which of the following statements best describes the effect on the particles in liquid nitrous oxide as its temperature is lowered to -91°C?

• The speed of the particles

  decreases.

• The particles begin to move in

  a straight line

• The particles begin to move with

  a greater force.

• The motion of the particles becomes

  more random

Tags

NGSS.MS-PS1-4

Which of the following provides the best evidence that a chemical change is taking place?

• A liquid forms as a solid object melts.

• A flame burns on the surface of a solid.

• Steam rises from the surface of a liquid.

• A metal object becomes shorter when it is cooled.

Tags

NGSS.MS-PS1-2

Which of the following best defines science?

• A collection of unchangeable facts about the natural world

• The study of the natural world through observation, identification, description, experimental investigation, and theoretical explanations

• A belief system based on assumptions about the natural world

• A method for proving theories beyond doubt

Tags

DOK Level 1: Recall

Which of the following is a property that can be used to identify a substance?

• Color

• Smell

• Density

• All of the above

What is the role of evidence in modifying scientific theories?

• Evidence is rarely considered when modifying theories.

• Evidence can refute or support theories, leading to modifications.

• Theories are modified first, then evidence is found to support the changes.

• Evidence is only used to confirm existing theories, not modify them.

Tags

DOK Level 3: Strategic Thinking

Which of the following properties of matter is not affected by changes in temperature or pressure?

• Volume

• Mass

• Density

• State

Tags

DOK Level 3: Strategic Thinking

What is the term for the variety of life in the world or in a particular habitat or ecosystem?

• Ecology

• Biodiversity

• Conservation

• Evolution

Tags

NGSS.MS-LS2-5

Which organ system is responsible for transporting nutrients and oxygen to the cells?

• Digestive system

• Circulatory system

• Respiratory system

• Nervous system