Worksheets8 Pre/Post Matter
Total questions: 20
Worksheet time: 10mins
What is the smallest unit of matter that retains the identity of the substance?
Molecule
Atom
Electron
Proton
Which subatomic particle has a positive charge?
Neutron
Electron
Proton
Photon
Identify the physical change from the following options.
Rusting of iron
Melting of ice
Burning of wood
Baking a cake
Which of the following best describes a chemical change?
When the size of an object changes.
When the shape of an object changes.
When molecules in a substance changes.
When the state of matter of an object changes.
What is the main purpose of cellular respiration?
To produce glucose
To convert solar energy into chemical energy
To release energy stored in glucose
To produce oxygen
Describe the role of chlorophyll in photosynthesis.
It absorbs sunlight to convert into chemical energy.
It provides nutrients to the plant.
It transports water throughout the plant.
It stores the energy produced.
Compare and contrast photosynthesis and cellular respiration in terms of energy flow.
Both processes release energy.
Photosynthesis stores energy, while cellular respiration releases energy.
Both processes store energy.
Photosynthesis releases energy, while cellular respiration stores energy.
What is the primary function of chloroplasts in plant cells?
To store nutrients
To conduct photosynthesis
To transport water
To provide structural support
Which of the following processes is an example of a chemical change?
Freezing water
Melting ice
Boiling water
Burning wood
What is the role of mitochondria in cellular respiration?
To absorb sunlight
To produce glucose
To generate ATP
To store oxygen
Which of the following is an example of an exothermic reaction?
Evaporation of water
Photosynthesis
Combustion of gasoline
Melting of ice
Does the following image shows an accurate depiction of a chemical equation?
Yes
No
Does the following image shows an accurate depiction of a chemical equation?
Yes
No
Which type of bond forms when one atom gives up electrons and another atom gains those electrons?
Covalent bond
Metallic bond
Ionic bond
Hydrogen bond
When two nonmetal atoms share electrons to form a molecule, what type of bond is formed?
Ionic bond
Covalent bond
Metallic bond
Magnetic bond
Which property of metal is most closely associated with metallic bonding?
Metals are brittle and shatter easily
Metals conduct electricity because electrons move freely
Metals form crystals by sharing electrons with nonmetals
Metals transfer electrons to form ions
Which statement best describes the Law of Conservation of Mass?
Mass increases when matter is heated
Mass is lost when a substance changes state
Mass is neither created nor destroyed in a chemical reaction
Mass only stays the same in physical changes
When a solid is heated and changes into a liquid, what happens to the motion of its particles?
The particles stop moving
The particles move more slowly
The particles move faster and spread farther apart
The particles disappear
When thermal energy is added to a substance the particles move faster, spread out, and the temperature of a substance increases until ___________.
...there is a change in state of matter.
...the molecules change.
...the atoms disolve.
...the molecules multiply.
Which situation best shows thermal energy being transferred?
A rock sitting outside on a cold day
Ice melting in a warm room
A closed book on a desk
A balloon floating in the air
