AnswersAISD-SCI-TX- 6th grade - 1st six weeks CR _ Summer 2026Unit Test

2.1 Metals Answers

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1
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A substance occupies one half of an open container. The atoms of the substance are closely packed but are still able to slide past each other.What is most likely the phase of the substance?

A
gas
B
liquid
C
solid and gas
D
liquid and solid
2
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Sari is studying four different samples of materials. This table shows the mass and volume of the samples.

Question illustration
A
W and Y
B
X
C
X, W, and Y
D
Z
3

Which describes a feature of the physical changes of all substances?

A
can dissolve in water
B
can conduct heat and electricity
C
rearranges atoms to form new substances
D
does not change the identity of a substance
4

The density of solid aluminum is 2.70 g/cm3. If a 1g piece of aluminum is dropped in a cup of water, what will happen to the aluminum? (The density of water is 1.00 g/cm3.)

A
It will sink to the bottom.
B
It will float to the top.
C
It will hover in the middle.
D
It will move up and down.
5

Kendra conducts an experiment. She mixes two chemicals, resulting in a chemical reaction. Based on Kendra’s experiment, what can be concluded about the original matter before mixing?

A
It did not change in identity but did change properties.
B
It changed in identity but not properties.
C
It changed in identity and properties.
D
It did not change in identity nor properties.
6

The density of an object is .835 g/cm3. If its volume is 34 cm3, what is the mass of the object? (Density: D = )

Question illustration
A
.02 g
B
.41 g
C
28.39 g
D
40.72 g
7

What is the density of a 700 kg object with a volume of 649 m3? (Density: D = )

Question illustration
A
0.927 kg/m3
B
.4543 kg/m3
C
1.079 kg/m3
D
4.543 kg/m3
8

A change in color indicates that what has occurred?

A
a physical change
B
a chemical change
C
precipitation formation
D
gas formation
9

Three grams of the same substance in different phases are stored in three different containers. Each container is barely large enough to hold the substance.Which statement can be known about the behavior of the atoms in each container?

A
The atoms in the solid would be moving vigorously around the container.
B
The atoms in the liquid would be vibrating in position.
C
The atoms in the solid would be vibrating in position.
D
The atoms in the gas would be moving slowly around the container.
10

Which is most likely a physical change?

A
cutting a substance into four pieces
B
burning a substance into ash and smoke
C
reacting a substance chemically to form a new substance
D
combining a substance with water to make rust
11

Which would show an example of how physical changes are reversible?

A
cutting a gold bar in two pieces and then putting the pieces next to each other
B
burning a match and then relighting it
C
melting tin and then cooling it into a mold
D
combining sodium and chlorine to make the new material of table salt
12

Venn diagrams are used for comparing and contrasting different topics. The overlapping sections show characteristics that the topics have in common, and the sections that are unique to each topic show the characteristics apply to only that topic.

Question illustration
A
Overlapping circles are labeled definite shape most dense at top, mid-level density at right, definite volume least dense at left, with the intersection labeled state of matter.
Option A
B
Overlapping circles are labeled definite shape most dense at top, mid-level density at right, least dense at left, with the intersection of all three labeled state of matter. The intersection of the top and right circles is labeled definite volume.
Option B
C
Overlapping circles are labeled definite shape most dense at top, definite volume mid-level density at right, least dense at left, with the intersection of all three labeled state of matter. The intersection of the left and right circles is labeled definite shape.
Option C
D
Overlapping circles are labeled definite shape least dense at top, definite mid-level density at right, most dense at left, with the intersection of all three labeled state of matter. The intersection of the left and right circles is labeled definite shape.
Option D
13

Which refers to any characteristic of matter that describes its ability to change into a different substance?

A
chemical change
B
physical change
C
chemical property
D
physical property
14

Carbonic acid reacts with sodium hydroxide to form water and sodium carbonate and water. Carbonic acid has a density of 1.67 g/cm3, and sodium carbonate has a density of 2.54 g/cm3.

A
It will be 2.54 g/cm3.
B
It will be different from the other chemicals.
C
It will be 1.67 g/cm3.
D
It will be the same as the other reactant.
15

If two items are equal in size, the denser one will

A
be lighter.
B
be heavier.
C
have more volume.
D
have less volume.
16

A column is filled with four different liquids of different densities. A red liquid, a blue liquid, a green liquid, and a purple liquid are all added into the column. This chart shows the densities of the liquids.In what order would the liquids arrange themselves, from top to bottom?

Question illustration
A
blue, red, purple, green.
B
purple, green, red, blue.
C
purple, green, blue, red.
D
blue, red, green, purple.
17

At which stage does a gas form in a gas formation reaction?

A
the reactants stage
B
the product stage
C
the liquid stage
D
the solid stage
18

A ________ in matter results in a change in its identity and properties.Which best completes the statement?

A
chemical change
B
chemical property
C
physical property
D
physical change
19

Cubes are three-dimensional square shapes that have equal sides. What is the density of a cube that has a mass of 12.6 g and a measured side length of 4.1 cm? (Density: D = )

Question illustration
A
.1828 g/cm3
B
.3254 g/cm3
C
3.073 g/cm3
D
68.92 g/cm3
20

Which statement best describes the atoms of the gas neon?

A
They slide past each other.
B
They move freely in all directions.
C
They vibrate in place.
D
They are packed closely together.

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