Back to Details Science 6 Unit 1 Test: Atoms & Elements, Thermal Energy, Properties of Matter Open in Editor

Science 6 Unit 1 Test: Atoms & Elements, Thermal Energy, Properties of Matter

Grade 6 Unit 1 Summative Assessment

            📚 Science
                            🎓 Grade 6
                                        ⏱️ 45 minutes
                    

1
Unit Test

Question 1

What is an atom?

The smallest particle of matter that still keeps a substance's identity
A pure substance made of only one type of atom
A measure of the average kinetic energy of the particles in a substance
The transfer of thermal energy from a warmer object to a cooler one

Question 2

What is an element?

The total energy of all the moving particles in a substance
A pure substance made of only one type of atom
The temperature at which a substance turns from solid to liquid
How much mass is packed into a given volume

Question 3

How is the periodic table organized?

Alphabetically, from Aluminum all the way through to Zinc
By the year in which each element was first officially discovered
As an organized catalog of every known element, ordered by atomic number
By how common each element is found to be in the Earth's crust and oceans combined

Question 4

Which of these is a correct chemical symbol?

Cu for copper
Alu for aluminum
Ir for iron
Sil for sulfur

Question 5

A sample of pure iron is broken in half. What is true of the atoms in each half?

Each half now contains a different, smaller element
The atoms in each half are still identical iron atoms
Breaking the sample changes the type of atom it is made of
Each half becomes a new pure substance unrelated to iron

Question 6

Element identity depends on which of the following?

How much of the sample you have
The type of atom that makes up the sample
Whether the sample is a solid, liquid, or gas
The current temperature of the sample

Question 7

What is thermal energy?

A measure of the average kinetic energy of the particles in a substance
The total energy of all the moving particles in a substance
The transfer of thermal energy from a warmer object to a cooler one
How much mass is packed into a given volume

Question 8

What is temperature?

The total energy of all the moving particles in a substance
A measure of the average kinetic energy of the particles in a substance
The temperature at which a substance turns completely from a liquid into a gas
How much of a substance can dissolve into another substance

Question 9

What is heat?

A measure of the average kinetic energy of the particles in a substance
The energy an object or particle has because it is moving
The transfer of thermal energy from a warmer object to a cooler one
The total energy of all the moving particles in a substance

Question 10

In which state of matter do particles stay close together but can slide past one another?

Solid, where the particles vibrate in place within a fixed arrangement
Liquid, where particles stay close together but can slide past one another
Gas, where the particles are far apart and move rapidly in every possible direction
Water vapor, which is the invisible gas state of water itself

Question 11

Water vapor cools and loses thermal energy until it becomes liquid water. Which phase change is this, and is energy added or removed?

Melting, as a solid turns into a liquid; energy is added
Condensation, as a gas turns into a liquid; energy is removed
Sublimation, as a solid turns into a gas; energy is added
Deposition, as a gas turns directly into a solid; energy is removed

Question 12

A student says crystallization is a totally separate process from freezing. Which statement is correct?

Crystallization and freezing are two completely unrelated phase changes
Crystallization only happens to metals and never happens to water
Crystallization relates to freezing; it is not a separate phase change
Crystallization is really the same process as sublimation

Question 13

A pot of water boils steadily on the stove. What happens to the water's temperature while it boils, even though thermal energy keeps being added?

The temperature keeps rising for as long as the water boils
The temperature does not change while the water is boiling
The temperature drops sharply the moment boiling begins
The temperature rises quickly, then falls back down again

Question 14

Which statement about water vapor is correct?

Water vapor is visible as the white clouds of steam above a boiling pot
Water vapor is the gas state of water, and it is itself invisible
Water vapor is a liquid state of water, not a gas state at all
Water vapor only forms once the water has risen above its normal boiling point

Question 15

What is density?

The temperature at which a substance turns from solid to liquid
How much mass is packed into a given volume
The total energy of all the moving particles in a substance
How much of a substance can dissolve into another substance

Question 16

Which property changes if you have twice as much of the same substance?

Density, since the amount of mass packed per volume stays completely fixed
Melting point, since it is a fixed property set by the substance itself
Mass, since doubling the material doubles the total amount
Boiling point, since it is set by the substance itself

Question 17

Which of these stays the same no matter how much of the substance you have?

Volume, which grows as the size of the sample grows
Weight, which also grows heavier as the sample size grows larger
Boiling point, which stays fixed for that particular substance
Mass, which grows as the size of the sample grows

Question 18

A sample has a mass of 17.9 g and a volume of 2.0 cm3. Density = mass / volume = 17.9 / 2.0 = 8.95 g/cm3. Using the density reference table, which metal is this sample most likely made of?

Aluminum, listed at 2.70 g/cm3
Iron, listed at 7.87 g/cm3
Copper, listed at 8.96 g/cm3
Zinc, listed at 7.14 g/cm3

Question 19

Why does ice float on liquid water?

Because ice always weighs less than the water it floats on
Because ice is less dense than liquid water
Because ice has a lower melting point than liquid water
Because ice and liquid water share exactly the same density

Question 20

What is solubility?

The temperature at which a substance turns from liquid to gas
How much of a substance can dissolve into another substance
How much mass is packed into a given volume of a substance
The amount of space that a substance takes up

Question 21

Ice cubes left on the counter turn into a puddle of liquid water. This is an example of:

Melting
Freezing
Sublimation
Condensation
Deposition

Question 22

A puddle of water left outside overnight gets cold and turns into a sheet of solid ice. This is an example of:

Melting
Freezing
Sublimation
Condensation
Deposition

Question 23

Solid dry ice (CO2) sitting on a table shrinks away into gas without ever forming a liquid puddle. This is an example of:

Melting
Freezing
Sublimation
Condensation
Deposition

Question 24

Water vapor in the air touches a cold glass of lemonade and appears as liquid droplets on the outside of the glass. This is an example of:

Melting
Freezing
Sublimation
Condensation
Deposition

Question 25

On a very cold night, water vapor in the air turns directly into a layer of solid frost on a window, without forming liquid first. This is an example of:

Melting
Freezing
Sublimation
Condensation
Deposition

Your Score