Unit 1 Test Flashcards
How many seconds are in 1.50 weeks?
907 s
how many sig. figs. are in the number 0.02?
1
Matter (define)
Anything that has mass + volume (everything)
What are the steps of the scientific method?
Observe - Define the problem (use 5 senses)
Hypothesis - Reasonable explanations for what was observed (educated guess)
Experiments - Test each hypothesis in order to prove/disapprove them
Analysis - Compares the results from the experiments to the original hypothesis
Conclusion (Theory) - A hypothesis supported by experimental evidence
How many g are equal to 345.7 mg?
0.3457
How many Micrograms (μg), Microliters (μL), and Micrometers (μm) are in grams (g), liters (L), and meters (m)?
10^-6μg = 1g
10^-6μL = 1L
10^-6μm = 1m
Write out 3.5 x 10^-5 in long form.
0.000035
Mass (define)
The amount of matter in an object
Write out 7,123 in scientific notation
7.123 x 10^3
Scientific Method (define)
organized approach to solve a problem
how many sig. figs. are in the number 0.020?
2
How many feet are equal to 54.7 inches?
4.56 ft
How many Kg are equal to 45,000 mg?
0.045 kg
How many Milligrams (mg), Milliliters (mL), and Millimeters (mm) are in grams (g), liters (L), and meters (m)?
1000mg = 1g
1000mL = 1L
1000mm = 1m
Answer the equation with the correct amt of sig. figs.
16.590/1.8 = ?
9.2
how many sig. figs. are in the number 2.0x10^-3?
2
How many mins are in an hour?
60 mins.
What are the properties of a gas?
- Indefinite shape
- Indefinite volume
- Compressible
- Very low density
How much feet are in a mile?
5280 feet
Energy (define)
Anything that can do work or produce heat
Mount Everest is approximately 8,000 meters high. How many miles high is Mount Everest?
5 miles
What is the symbol and meaning for the prefix micro?
Symbol: μ
Meaning: millionth (10 ^-6)
Write out 0.000000081 in scientific notation
8.1 x 10^-8
Give examples of a compound.
CO2 (carbon dioxide), NO2 (nitrogen dioxide)
(formed when elements chemically combine)