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WorksheetsPhysical and Chemical Changes
Total questions: 10
Worksheet time: 5mins
The formation of a solid when two liquids combine is called?
Solidification
Precipitate
Freezing
Solubility
During photosynthesis, carbon dioxide and water combine according to the general equation:
Why is photosynthesis a chemical reaction?
because new substances are formed
because the reactants are compounds
because an input of energy is required
because the products include an element
A student kept a notebook during an investigation. Which recorded observation was MOST likely a physical change?
frying an egg
toasting bread
baking a cake
melting butter
John and Lisa collected a sample of ocean water and placed it in a jar. Within a couple of days, the water had evaporated and salt was visible at the bottom of the jar. This is an example of a
physical change
solvent being dissolved
chemical change
new substance being formed
A chemist observed bubbling and fizzing after adding an acid solution to a white powdery substance in a beaker. Which of the following can be inferred?
a physical reaction produced a gas mixture
the acid and powder formed a new product
the acid boiled when poured into the beaker
a reaction occurred that produced heat
Students performed an investigation on how aluminum cans taken to a recycle center were able to be reused. They found out an aluminum can undergoes which type of change?
a physical change because the can is heated
a chemical change because an old can is changed into a new can
a chemical change because new metal is formed
a physical change because the material remains the same
What is needed to change ice into water?
air
stirring
energy
chemicals
Which best represents a physical change?
bubbling
formation of a precipitate
condensation
formation of a new substance
Which best demonstrates a physical change?
change in temperature
change in state
formation of a gas
unexpected color change
What kind of properties can only be observed when a substance changes into a different substance?
physical properties
chemical properties
liquid properties
real properties
