Chemistry Comp Exam Study Guide 2

List the three routes of entry for a substance to get into your body.

• Ingestion, Inhalation, Skin absorption

• Digestion, Circulation, Excretion

• Absorption, Filtration, Evaporation

• Injection, Excretion, Perspiration

List three pieces of required PPE to be worn in the chemistry laboratory.

• Gloves, goggles, long sleeves/long pants

• Sandals, sunglasses, shorts

• Scarf, flip-flops, t-shirt

• Hat, slippers, jeans

Complete the table by writing the names of safety equipment used for each situation.

• Chemical splashes: Eyewash, sink, safety shower; Fire: Fire extinguisher; Toxic vapors: Fume hoods

• Chemical splashes: Fire extinguisher; Fire: Fume hood; Toxic vapors: Eyewash

• Chemical splashes: Fume hood; Fire: Eyewash; Toxic vapors: Fire extinguisher

• Chemical splashes: Sink only; Fire: Safety shower; Toxic vapors: Fire extinguisher

Identify each hazard symbol:

• Flammable, Toxic, Corrosive

• Radioactive, Explosive, Oxidizing

• Irritant, Environmental Hazard, Compressed Gas

• Biohazard, Harmful, Carcinogenic

Review the data from a student experiment and write the following: a. Hypothesis: ________ b. Independent variable: ________ c. Dependent variable: ________ d. Type of graph: ________

• a. The design of paper airplanes affects the distance traveled b. Design of paper airplanes c. Distance traveled d. Bar graph

• a. The weight of paper affects the color of airplanes b. Weight of paper c. Color of airplanes d. Line graph

• a. The color of paper airplanes affects the distance traveled b. Color of paper airplanes c. Distance traveled d. Pie chart

• a. The length of the runway affects the speed of airplanes b. Length of runway c. Speed of airplanes d. Scatter plot

Identify the name and symbol of the SI Unit for each measurement: 1. Length: ________ (____) 2. Mass: ________ (____) 3. Amount of Substance: ________ (____) 4. Time: ________ (____) 5. Temperature: ________ (____)

• 1. Meter (m) 2. Kilogram (kg) 3. Mole (mol) 4. Seconds (s) 5. Kelvin (K)

• 1. Liter (l) 2. Gram (g) 3. Mole (ml) 4. Minute (min) 5. Celsius (C)

• 1. Meter (m) 2. Gram (g) 3. Mole (mol) 4. Seconds (s) 5. Fahrenheit (F)

• 1. Centimeter (cm) 2. Kilogram (kg) 3. Mole (mol) 4. Hour (h) 5. Kelvin (K)

Define Accuracy.

• Accuracy is the degree to which the result of a measurement conforms to the correct value.

• Accuracy is the ability to perform a task with speed.

• Accuracy is the consistency of repeated measurements.

• Accuracy is the ability to perform a task without any tools.

Define Precision.

• Closeness of measurements to each other

• Closeness of measurements to the true value

• Ability to measure small quantities

• Measurement of systematic error

A measurement was taken three times. The correct measurement was 32.0 g. Circle whether each set of measurements is accurate, precise, both, or neither. i. 32.1 g, 32.2 g, 31.9 g

• accurate

• precise

• both

• neither

A measurement was taken three times. The correct measurement was 32.0 g. Circle whether each set of measurements is accurate, precise, both, or neither. ii. 38.3 g, 67.5 g, 98.0 g

• accurate

• precise

• both

• neither