WorksheetsChapter 2- Matter, Elements, and Compounds
Total questions: 18
Worksheet time: 9mins
Which statement best defines matter in the context of living organisms?
Anything visible to the naked eye
Anything composed only of compounds
Anything that contains carbon atoms
Anything that has mass and takes space
Which description distinguishes an element from a compound?
Element contains atoms in variable ratios
Compound cannot be formed from elements
Compound contains only one unique atom
Element cannot be broken chemically
How are atoms, molecules, and cells related in the hierarchy of life?
Molecules build atoms, atoms cells
Cells build molecules, molecules atoms
Atoms build molecules, molecules cells
Atoms and cells form molecules together
Which set lists the four elements that make up about 96% of living matter?
Cu,Zn,Co,Ni
Na,Cl,Fe,I
Ca,P,K,S
O,C,H,N
Essential elements are best described as
Required for life processes
Occur only in compounds
Always toxic in high doses
Present only in plants
Trace elements are characterized by which feature?
Always harmful to organisms
Required in minute quantities
Make up 96 percent mass
Never needed by animals
Humans typically have about how many essential elements compared to plants?
Humans 92, plants 92
Humans 17, plants 25
Humans 25, plants 17
Humans 4, plants 4
Which subatomic particles are found packed together in the atomic nucleus?
Neutrons and electrons
Protons and electrons
Protons and neutrons
Electrons only
What charge does an electron carry?
Double positive
Neutral zero
Negative one
Positive one
Which statement best describes atomic number?
Average mass of isotopes
Number of protons in nucleus
Number of electrons in shells
Sum of protons and neutrons
Which subatomic particle’s mass is about 1/2,000 that of a proton or neutron?
Electron
Proton
Neutron
Alpha particle
What is the mass number of an atom?
Number of valence electrons
Total electrons present
Sum of protons and neutrons
Average atomic mass
How do you determine the number of neutrons in an atom?
Multiply protons by electrons
Divide mass number by electrons
Subtract atomic number from mass number
Add protons and electrons
Which pair correctly matches particle with electric charge?
Proton
Positive charge
Neutron
No charge
Electron
Negative charge
What does the molecular formula H2 indicate?
Hydrogen bonded to oxygen
One hydrogen atom double bonded
Two atoms of hydrogen present
Two hydrogen molecules bonded together
An ionic bond forms when
Temporary charge regions attract molecules
Two atoms equally share electrons
One atom loses and another gains an electron
Hydrogen is attracted to oxygen weakly
What are the starting and ending substances called in a chemical reaction?
Substrates and catalysts
Reactants and products
Ions and complexes
Solutes and solvents
Which equation summarizes the overall process of photosynthesis in plants?
6 CO2 + 6 H2O → C6H12O6 + 6 O2
C6H12O6 → 6 CO2 + 6 H2O
CO2 + O2 → H2O + glucose
6 O2 + glucose → 6 CO2 + water
