Quiz about Matter Unit Test

Question 1

Which statement is accurate for these two sub-atomic particles.

Accepted Answer

They are both located in the nucleus.

Answer

They both have a neutral charge.

Answer

They both have a positive charge.

Answer

They are both located outside the nucleus.

Question 2

Sodium and Chlorine combine to form table salt. Given the chemical reaction, how many grams of 2Na + Cl2 would be required to produce 4 grams of table salt?

Accepted Answer

4 grams

Answer

2 grams

Answer

3 grams

Answer

8 grams

Question 3

Summarize the Venn diagram.

Accepted Answer

Atoms are the most basic form of matter. They combine to form larger electrically stable compounds.

Answer

Compounds are found inside the matter of atoms.

Answer

A pure substance may contain subatomic particles but not atoms.

Answer

Compounds are the most basic form of matter. They combine to form larger atoms.

Question 4

A group of chemistry students had to identify six white powders. The students used a variety of tests to identify the powders. They computed the density of each powder. They checked to see if any dissolved in water. One of the powders did not dissolve in water and they thought it was cornstarch. Someone knew that cornstarch felt slippery and reacted with iodine. The students put a few drops of iodine on each white powder. One powder turned black; they guessed that it was cornstarch. They heated the powders in a Bunsen burner flame to see if any would melt. One did and they guessed it might be a sugar.

Which test result indicated a chemical change had taken place?

Accepted Answer

turns black when iodine is added

Answer

dissolves in water

Answer

feels slippery in water

Answer

melts when heated in a flame

Question 5

Maria and Carla were hiking when Maria tripped, fell, and sprained her ankle. Carla took out the first-aid kit and unwrapped a cold pack. Carla popped a vial that was inside the cold pack. The pack began to get icy cold and Carla applied the pack to Maria's ankle.

What kind of reaction occurred in the cold pack? What evidence supports your answer?

Accepted Answer

It is a chemical change because heat energy is absorbed and the pack gets colder.

Answer

It is a physical change as evidenced by a drop in temperature.

Answer

It is a chemical change because two different chemicals are mixed together.

Answer

It is a physical change because the substance in the vial dissolved in the pack's liquid.

Question 6

What element behaves MOST like magnesium (Mg)?

Accepted Answer

Sr

Answer

S

Answer

Si

Answer

Sn

Question 7

During a physical science lab investigating chemical reactions, several students placed a 30g antacid tablet in a 30g zip-lock bag. They recorded the masses of the tablet, and the bag. Then they added 50 grams of water and quickly sealed the bag. The tablet began to fizz and soon disappeared. The bag was filled with gas. If the mass of the liquid after the reaction is completed is still 50 grams, how much gas is produced?

Accepted Answer

30 grams

Answer

50 grams

Answer

80 grams

Answer

90 grams

Question 8

Matter may be classified as a pure substance or a mixture. Where on the Venn diagram would you insert the term "pure substance"?

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 9

Your teacher hands you a clear liquid and asks you to classify it. You and your lab partner perform a sample of tests and get the following results:

1. After evaporation, no substances remain. 2. No residue remains in paper after filtering. 3. Boiling point is low (compared to water).

Where on the Venn Diagram would you place your mystery substance?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 10

Describe the energy change in the particles of a substance during melting.

Accepted Answer

Absorbed energy results in the change in potential energy.

Answer

The kinetic energy of the particles remains unchanged.

Answer

As the temperature increases during melting, the kinetic energy also increases.

Answer

The kinetic energy of the particles decreases as the particles move farther apart.

Question 11

When a substance such as ice melts, its temperature increases. Describe what happens to the arrangement of the water molecules as the temperature increases.

Accepted Answer

Water molecules become less orderly and they spread apart.

Answer

Water molecules separate into hydrogen and oxygen atoms.

Answer

The kinetic energy of the water molecules decreases proportionally to the temperature change.

Answer

Water molecules lose all contact with one another and intermolecular forces are non-existent.

Question 12

Ben and Sam were conducting experiments on physical and chemical changes in science class. First they added some salt to water and stirred it up until the salt dissolved. "That's a physical change" Ben said. "And that's a solution which is a mixture", added Sam. Next they added an anti-acid tablet to some water. The water began to fizz and bubble. The beaker got cooler. "That's a physical change too," Ben noted. "No, it's not," responded Sam. Who is correct and where should the contents of the beaker be placed in the Venn diagram?

Accepted Answer

Sam is correct. It is a chemical change and the contents should be in D. for compound.

Answer

Sam is correct. It is not a physical change and it should be placed in A.

Answer

Ben is correct. It is a physical change and it is a solution, placing it in B. as a mixture.

Answer

They are both correct. It is a mixture and a compound and the contents should be placed in C.

Question 13

The molecule arrangement of ice, water and steam are very different. _______ has the most ordered arrangement, ______ has the next most orderly arrangement, and ___________ has the least orderly arrangement of molecules.

Accepted Answer

ice, water, steam

Answer

steam, water, ice

Answer

water, steam, ice

Answer

water, ice, steam

Question 14

Mrs. Smith is demonstrating a chemical change for her class. She places 15 grams of baking soda into a beaker. Next she adds 15 grams of vinegar to the same beaker. When the two compounds make contact, they bubble and fizz a great deal. She places the beaker on the balance and notes that the mass of the solution in the beaker is less than the expected 30 grams.

Why is the mass of the solution in the beaker less than 30 grams?

Accepted Answer

The gas that was released changed the mass.

Answer

The balance was not working correctly.

Answer

Mass is always lost in a chemical reaction.

Answer

The new products have less mass than the original reactants.

Question 15

From the list below, determine which properties are for compounds.

I. It takes a large amount of energy to separates the elements of a compound. II. The proportions of the elements in a compound are always fixed.

III. It is easy to separate the elements of a compound.

IV. The elements/components of a compound do not retain their individual properties.

Accepted Answer

I,II&IV

Answer

I&II

Answer

II&III

Answer

II, III, & IV

Question 16

The circle on the left shows a magnified view of a very small portion of liquid water in a closed container. What would the magnified view show after the water evaporates?

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 17

Which image(s) would be considered pure substances?

Accepted Answer

III and V

Answer

V

Answer

I and II

Answer

II and IV

Question 18

I. An atom is the smallest unit of an element and a molecule is made up of two or more atoms chemically bonded together.

II. An atom is indivisible and a molecule can be broken down into atoms.

III. An atom is the smallest unit bonded together and a molecule is made up of elements.

IV. An element is the smallest unit of an atom and a molecule is made up of two or more metal and non-metal atoms chemically bonded together.

Which conclusion(s) best elaborate on the difference(s) between an atom and a molecule?

Accepted Answer

I&II

Answer

II&III

Answer

III&IV

Answer

IV&I

Question 19

Elaborate on the reason(s) that matter is said to move even as in a solid state.

Accepted Answer

The particles are not able to move out of their positions relative to one another, but do have small vibrational movements.

Answer

The particles are bound through intermolecular forces but are able to move past each other with relative freedom.

Answer

The particles have sufficient energy to become an ionized gas and are in the most common state of matter in the universe.

Answer

The particles are not bound to one another, move quickly, have a low density, and are able to spread apart from one another if unconstrained.

Question 20

I. O2 is chemically bonded together.

II. O2 is divisible.

III. Oxygen is a nonmetal.

IV. The natural state of oxygen is as a diatomic gas.

Which conclusion can be drawn from these statements about O2?

Accepted Answer

O2 is a molecule.

Answer

O2 is an atom.

Answer

O2 is an electron.

Answer

O2 is an element.

Question 21

From the list below, identify which situation(s) contain chemical changes.

I) A pot of water is being heated on a stove. Bubbles form and condensation appears on the lid of the pot.

II) A translucent, blue copper (II) sulfate solution is mixed with another solution and changes to a translucent lighter blue color. III) Ammonium nitrate solid dissolves in water and feels very cold.

IV) Red and blue paint are mixed together and the color purple appears.

Accepted Answer

III only

Answer

I and II

Answer

II, III and IV

Answer

I, II and III

Question 22

Elaborate what knowing that carbon-14 has an atomic number of 6 tells us about the atom.

Accepted Answer

Carbon-14 contains 6 electrons, 6 protons, and 8 neutrons.

Answer

Carbon-14 contains 6 baryons, 7 prions, and 8 neutrons.

Answer

Carbon-14 contains 7 electrons, 7 protons, and 7 quarks.

Answer

Carbon-14 contains 8 electrons, 6 photons, and 6 neutrons.

Question 23

A student draws a picture of the products and reactants of a chemical reaction. What, if anything, is wrong with the drawing?

Accepted Answer

The drawing is correct because there are 12 atoms of each type on each side of the arrow.

Answer

The drawing is wrong because there are more chemicals on the products side.

Answer

The drawing is correct because there are 12 compounds on each side of the arrow.

Answer

The drawing is wrong because there are different compounds on each side of the arrow.

Question 24

A flask with vinegar in it has a mass of 160 grams. A balloon with baking soda in it has a mass of 40 grams. The balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. The balloon inflates to a large volume. What will the total mass of the balloon and flask be after the balloon inflates? Explain.

Accepted Answer

200 grams, because all the atoms remain in the balloon or flask.

Answer

Less than 200 grams because the solid baking soda disappears.

Answer

More than 200 grams because the size of the balloon is so much larger.

Answer

Less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.

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