SCIENCE CHEMH GIZMO CHEMISTRY
HONORS ACTUAL EXAM PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◉ When are zeros significant? Answer: -when they are measured
-when they are read off of a scale
-when they are to the *right* of other sig figs and the decimal point
is written in the number
◉ sig figs in multiplication and division Answer: answer has the
same number of *sig figs* as the measurement with the least
number of *sig figs*
◉ sig figs in addition and subtraction Answer: answer has the same
number of *decimal places* as the measurement with the least
number of *decimal places*
◉ scientific notation Answer: first sig fig.rest of the sig figs x
10∧(number of decimal places away from 0) (if a decimal, power is
negative)
◉ kilo (k) Answer: 1000x
10³
,◉ hecto (h) Answer: 100x
10²
◉ deka (da) Answer: 10x
10¹
◉ base unit Answer: 1x
10⁰
◉ deci (d) Answer: 1/10 x
10⁻¹
◉ milli (m) Answer: 1/1000 x
10⁻³
◉ micro (µ) Answer: 1/1,000,000 x
10⁻⁶
◉ nano (n) Answer: 1/1,000,000,000 x
10⁻⁹
,◉ small number to large number Answer: move decimal point left
◉ large number to small number Answer: move decimal point right
◉ density formula Answer: D=M/V
◉ Five Step Method Answer: uses when an algebraic equation is
used in a problem
◉ Step 1 Answer: write down the knowns and knowns
◉ Step 2 Answer: write an equation relating the variables
◉ Step 3 Answer: solve the equation for the unknown variable
◉ Step 4 Answer: plug-in the numbers with units *and evaluate the
units*
◉ Step 5 Answer: calculate answer with units
◉ Kelvin to Celcius Answer: K=°C-273
, ◉ Celsius to Kelvin Answer: °C=K+273
◉ feet in a mile Answer: 5280
◉ velocity formula Answer: V=D/T
◉ matter Answer: anything that has mass and occupies space
◉ substance Answer: kind of matter, all samples of which have the
same properties or characteristics
◉ mixture Answer: consists of two or more substances, each of
which retains its individual properties
◉ element Answer: a substance that cannot be broken down into
other substances by ordinary chemical change
◉ compound Answer: a substance made up of two or more elements
chemically combined
◉ homogeneous mixture Answer: matter that has uniform
characteristics throughout the mixture
HONORS ACTUAL EXAM PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◉ When are zeros significant? Answer: -when they are measured
-when they are read off of a scale
-when they are to the *right* of other sig figs and the decimal point
is written in the number
◉ sig figs in multiplication and division Answer: answer has the
same number of *sig figs* as the measurement with the least
number of *sig figs*
◉ sig figs in addition and subtraction Answer: answer has the same
number of *decimal places* as the measurement with the least
number of *decimal places*
◉ scientific notation Answer: first sig fig.rest of the sig figs x
10∧(number of decimal places away from 0) (if a decimal, power is
negative)
◉ kilo (k) Answer: 1000x
10³
,◉ hecto (h) Answer: 100x
10²
◉ deka (da) Answer: 10x
10¹
◉ base unit Answer: 1x
10⁰
◉ deci (d) Answer: 1/10 x
10⁻¹
◉ milli (m) Answer: 1/1000 x
10⁻³
◉ micro (µ) Answer: 1/1,000,000 x
10⁻⁶
◉ nano (n) Answer: 1/1,000,000,000 x
10⁻⁹
,◉ small number to large number Answer: move decimal point left
◉ large number to small number Answer: move decimal point right
◉ density formula Answer: D=M/V
◉ Five Step Method Answer: uses when an algebraic equation is
used in a problem
◉ Step 1 Answer: write down the knowns and knowns
◉ Step 2 Answer: write an equation relating the variables
◉ Step 3 Answer: solve the equation for the unknown variable
◉ Step 4 Answer: plug-in the numbers with units *and evaluate the
units*
◉ Step 5 Answer: calculate answer with units
◉ Kelvin to Celcius Answer: K=°C-273
, ◉ Celsius to Kelvin Answer: °C=K+273
◉ feet in a mile Answer: 5280
◉ velocity formula Answer: V=D/T
◉ matter Answer: anything that has mass and occupies space
◉ substance Answer: kind of matter, all samples of which have the
same properties or characteristics
◉ mixture Answer: consists of two or more substances, each of
which retains its individual properties
◉ element Answer: a substance that cannot be broken down into
other substances by ordinary chemical change
◉ compound Answer: a substance made up of two or more elements
chemically combined
◉ homogeneous mixture Answer: matter that has uniform
characteristics throughout the mixture
