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WorksheetsMCA Science Review
Total questions: 20
Worksheet time: 28mins
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
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
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
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
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?
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.
Which of the following diagrams shows the motion of two continental plates that will most likely form a mountain range over time?
The bone structures in a bat wing and a whale flipper are shown below.
Which of the following statements best explains the similarity between the bone structures in the bat wing and the whale flipper?
Both animals evolved from a common ancestor.
Organisms that flew evolved into organisms that swim.
All organisms evolve following the same basic pattern
All animal parts used for motion evolve in the same way.
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
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
Humans inherit only 46 chromosomes but show thousands of different genetic traits.
Which of the following best explains how humans can show thousands of traits?
Every cell in a human contains a
copy of all the chromosomes.
The body duplicates chromosomes
each time it needs to express a trait.
Each chromosome has hundreds
to thousands of genes that store
information for specific traits.
The body produces thousands of new
cells with different combinations of
chromosomes as a human grows.
The table below shows the length of a year on Mercury and on Earth.
Which of the following statements best explains why Mercury has a shorter year than Earth?
Mercury is closer to the Sun
Mercury’s climate is warmer.
Mercury’s axis has a greater tilt.
Mercury rotates slower on its axis.
The table below lists some of the cell structures present in four different cells.
Based on the information in the table, which cell is most likely an animal cell?
cell 1
cell 2
cell 3
cell 4
The table below shows the masses and volumes of four cubes made of different materials.
Which cube has the greatest density?
cube 1
cube 2
cube 3
cube 4
The paths of two air masses, X and Y, are shown in the diagram below. Air mass X is a cold air mass. Air mass Y is a warm air mass. When the air masses meet, winter storms may be produced.
Which of the following most likely contributes to the formation of these storms?
Cold air mass X moves over warm
air mass Y, and evaporation occurs.
Warm air mass Y moves over cold
air mass X, and condensation occurs.
Cold air mass X mixes with
warm air mass Y, and the overall
temperature increases
Warm air mass Y mixes with
cold air mass X, and the overall
temperature decreases.
Sucrose (C12H22O11) is also known as table sugar.
What is the smallest unit of sugar that maintains the chemical characteristics of sugar?
an atom
an element
a grain
a molecule
Which of the following statements describes a characteristic that is common to bacteria, mushrooms, insects, and plants?
Each type of organism makes
its own food
.
Each type of organism is made
of one or more cells
Each type of organism has one
or more organ systems.
Each type of organism requires
carbon dioxide to breathe.
