AnswersAISD-SCI-TX- 6th grade - 1st six weeks CR _ Summer 20261.2 Chemical Changes

1.2 Chemical Changes — Unit test Answers

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1
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What is conserved in physical changes?

A
shape
B
energy
C
mass
D
density
2
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Which ranks these materials by the attraction between their atoms from the weakest to the strongest?

A
oxygen gas, liquid water, liquid honey, solid iron ore
B
liquid water, liquid honey, oxygen gas, solid iron ore
C
solid iron ore, liquid honey, liquid water, oxygen gas
D
oxygen gas, liquid honey, liquid water, solid iron ore
3

Chanel has some cotton candy that came in a cloudy shape. She wants to make it more dense. Which describes the candy before and after Chanel manipulated it?

A
The candy before was a cube, and the candy after was a ball.
B
The candy before was compacted, and the candy after was fluffy.
C
The candy before was fluffy, and the candy after was compacted.
D
The candy before was a ball, and the candy after was a cube.
4

Which object would sink in honey, which has a density of 1.4 g/cm³?

A
Object 1 (0.9 g/cm³)
B
Object 2 (1.2g /cm³)
C
Object 3 (0.2 g/cm³)
D
Object 4 (2.3 g/cm³)
5

Which tools would Sara use to find an irregularly shaped object’s mass and volume?

A
a meter stick, a ruler, and water
B
a meter stick, a balance, and water
C
a balance, water, and a ruler
D
a balance, water, and a beaker
6

Which property of physical changes explains why matter is conserved in a physical change?

A
The arrangements of particles do not change, and the bonds between atoms do not break.
B
Mass, not energy, changes in a physical change.
C
Energy and mass change in a physical change.
D
The bonds between atoms do not break; it is only the arrangement that changes.
7

In relation to the reactants of a chemical reaction, the products are

A
half the reactants.
B
twice the reactants.
C
the same as the reactants.
D
different from the reactants.
8

Which state(s) of matter have no definite shape or volume?

A
liquids and solids
B
liquids and gasses
C
gasses
D
solids
9

Four students are analyzing four different substances and recording their findings in this table.Which most describes this table?

Question illustration
A
Leonna has a solid, Xiao and Blake have liquids, and Amir has a gas.
B
Leonna and Amir have gasses, Xiao has a liquid, and Blake has a solid.
C
Leonna has a solid, Xiao has a liquid, Blake has a gas, and Amir made a mistake.
D
Leonna has a solid, Xiao has a liquid, Blake made a mistake, and Amir has a gas.
10

What has occurred when a solid forms out of the mixing of two liquids in a chemical reaction?

A
melting
B
gas formation
C
combustion
D
precipitate formation
11

Which statement gives two characteristics of all liquids?

A
They spread out to fill space and have atoms that vibrate in place.
B
They have atoms that vibrate in place and have a definite shape.
C
They will change shape to fit a container and have definite volume.
D
They have definite volume and have atoms that move freely in all directions.
12

If a person has the values for an object’s density and volume, what value can be calculated?

A
the object’s size
B
the object’s mass
C
the shape the object forms in a container
D
the amount of space the object takes up

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