Mca Science

A medical company designs a new device to measure a person’s vital signs, including heart rate and blood pressure. During the design process, the company produces several prototypes.

During which of the following steps is it most appropriate to use a prototype?

• distributing information about

  the device

• researching how vital signs are

  measured

• testing whether the device works

  properly

• determining which vital signs are

  most important

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

NGSS.MS-ETS1-4

A student removes a pitcher of chilled lemonade from a 5°C refrigerator and leaves the pitcher in a 20°C room for several hours.

Which of the following statements best describes the flow of energy during this time?

• Cold energy flows from the lemonade to the room until the room

  is colder than the lemonade.

• Heat energy flows from the room to the lemonade until the lemonade is warmer than the room.

• Cold energy flows from the lemonade to the room until the

  lemonade and the room are the same temperature.

• Heat energy flows from the room to the lemonade until the lemonade and the room are the same temperature

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

The graph above shows the motion of four different cars over a period of 5 s. Which car had an average speed of 4 m/s?

• car A

• car B

• Car C

• car D

Tags

NGSS.MS-PS3-1

Which of the following is most similar to the number of stars in a galaxy?

• the number of galaxies in the universe

• the number of layers that make up Earth

• the number of stars in our solar system

• the number of planets in our solar system

Which of the following was directly caused by the first photosynthetic organisms on Earth?

• a decrease in the amount of soil being made

• a decrease in the amount of salt in the ocean

• an increase in the percentage of oxygen in the atmosphere

• an increase in the average global temperature of the atmosphere

Tags

NGSS.MS-LS1-6

A student drew the model of a bridge shown below.

Which diagram shows how the student should draw arrows to represent the compression forces acting on the bridge’s towers?

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• 
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Tags

NGSS.MS-ETS1-2

NGSS.MS-PS2-1

NGSS.MS-PS2-2

An anemometer measures wind speed. The diagram below shows an anemometer that a student built.

Which of the following statements best explains why the student used a metal pin to hold the straws in place?

• The pin is thin and strong.

• The pin can be magnetized

• The pin is flexible and shiny

• The pin can conduct heat energy.

White blood cells help protect the human body from disease.

This is an example of which two body systems working together?

• muscular system and immune system

• muscular system and digestive system

• circulatory system and immune system

• circulatory system and digestive system

An apple falls off a tree onto the ground.

Which of the following best describes what eventually happens to the material that makes up the apple?

• Water softens the apple and its material dissolves into the ground

• Sunlight decomposes the apple and recycles its material into the soil.

• Weather conditions rot the apple until all its material disappears and no longer exists.

• Microscopic organisms break down the apple and release its material into the soil and air.

Tags

NGSS.MS-LS2-3

Which of the following diagrams shows the motion of two continental plates that will most likely form a mountain range over time?

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• 
• 

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3