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Test Review: Chemical and Physical Changes Flashcards | StudBud
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Test Review: Chemical and Physical Changes
Test Review: Chemical and Physical Changes
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1
Which of the following is an example of a physical change?
A glass falling and shattering on the floor
Baking soda and vinegar mixing together
Baking a birthday cake
Burning a piece of paper
2
Gallium is a metal. If you hold a solid piece in your hand, it will melt. This is a _____.
Displacement
Chemical change
Absorption
Physical change
3
Identify what’s happening in the picture below as a chemical or physical change.
Physical
Chemical
Both
4
Which process is an example of a chemical change?
Cooking a steak
Drying clothes in the dryer
Making a cup of tea
Chopping a tree
5
When iron is exposed to water vapor and air, it rusts. This is an example of a ________ change.
Both
Physical
Chemical
6
What type of change is happening in the image below?
Chemical
Both
Physical
7
Which types of changes observe the law of conservation of mass?
Only changes of state
Only physical changes
Only chemical changes
Physical changes and chemical changes
8
Why is the below picture an example of a physical change?
The materials making up the pencil are different.
The materials making up the pencil did not change.
The pencil can no longer be used.
The pencil is a different size.
9
Identify what’s happening in the picture below as a chemical or physical change.
Chemical
Physical
Both
10
What does a chemical change result in?
A change in texture of the substance.
A phase change in the substance (ex. liquid to solid)
A change in the way atoms are arranged in space.
A change in the way atoms are bonded to each other.
11
Which process is an example of a physical change?
metal rusting
wood burning
milk souring
Ice melting
12
Properties that describe how a substance looks, feels, state of matter, etc. are?
Physical properties
Chemical properties
13
Does the following represent a chemical or physical change?
Both
Chemical
Physical
14
Burning wood into ash is an example of which kind of change?
Absorption
Chemical
Displacement
Physical
15
A statue damaged by acid rain is a chemical change.
False
True
16
Which process is a sign of a chemical change?
A plaster statue breaks when it falls onto the floor
A melting block of ice leaves a large puddle
A cloud quickly changes shape when blown by wind
A rotting potato gives off a bad smell
17
Does the following represent a chemical or physical change?
Both
Physical
Chemical
18
Which process is an example of a physical change?
A peanut butter and jelly sandwich being digested
Sodium metal and chlorine gas combined to form table salt
Sodium metal and water combining to for a compound and gas
Cutting carrots into pieces and mixed in a salad
19
Which process is an example of a physical change?
Water breaks down into hydrogen oxygen gases over time
Carbon combines with oxygen to form carbon dioxide gas
Water turns to steam when boiled
Limestone breaks down into lime and carbon dioxide if heated
20
Gordon adds a solid and a liquid together and produces a gas. Which process must have occurred?
Evaporation
Condensation
A chemical change
A physical change
21
Which type of change is most often easily reversed?
Chemical
Both
Physical
22
Pablo notices that ice cream melts when left out at room temperature. What is Pablo observing?
A chemical reaction
A chemical change
The formation of a new substance
A physical change
23
Does the following represent a chemical or physical change?
Both
Physical
Chemical
24
Which process is an example of a physical change?
Decomposing
Rusting
Flattening
Burning
25
Does the following represent a chemical or physical change?
Both
Chemical
Physical
26
After10mins Rita's toast is black on both sides. What caused the chemical reaction to go too far
A decrease in temperature
An increase in temperature
The size of the bread
The type of bread
27
Paper is burned & the mass of the ash is less than the mass of the original paper.Which is true
Some of the matter is destroyed during the reaction
Some of the products of the reaction were given off as a gas
The mass of the ash cannot be accurately determined
The ash has less volume than the paper
28
Drying wet hair is an example of a chemical change.
False
True
29
Which type of change does the diagram below show?
A change in reaction
A chemical change
A physical change
A change in mass
30
Which process is an example of a chemical change?
Alcohol evaporating from a cotton swab
A piece of wood shrinking as it dries out
A metal railing rusting in damp weather
Steam rising from a boiling pot of soup
31
Properties that describe how a substance reacts with other substances are called?
Physical properties
Chemical properties
32
Marco tears a piece of notebook paper into smaller pieces, as shown below. This is a ____?
A change in energy
A change in mass
A physical change
A chemical change
33
Which process represents a chemical change?
A metal bar is rolled into a flat sheet
Sand, water, and salt combine to form a mixture
A lake freezes over into ice
Vinegar bubbles when baking soda is added
34
Which process is an example of a physical change?
Rock being crushed into gravel
Paper burning into ash
Dough being baked into bread
Apple juice turning into vinegar
35
Which process is an example of a chemical change?
A piece of metal being heated until it expands
Bath water cooling while you take a bath
A glass window breaking when hit with a baseball
An iron nail rusting
36
Sean's bike begins to rust in the winter.What tells Sean that a chemical change is happening?
The metal is beginning to rust
The bicycle was outside all winter
The metal fender is bent
The paint is scatched
37
Identify what’s happening in the picture below as a chemical or physical change.
Physical
Both
Chemical
