Scientific Method
An organized approach to problem solving is called _________________.
The scientific method
When there is no decimal point which direction do we count?
Right to left
What is 5000 written in scientific notation?
5 x 103
What is the unit for mass?
grams
What is 154 rounded to 1 s.f.
100
Which step of the scientific method uses your five senses (sight, hearing, touch, taste, smell)?
Observation
How many sig figs are in 101.4?
4 s.f.
What is 4.20 x 10-2 written in long form?
0.0420
What are the two units possible for density?
g/mL and g/cm3
What is 24,003 rounded to 2 s.f.?
24,000
A student observes that when a penny is left outside, it changes color. What is the next step of the scientific method must he do next?
Make a hypothesis
How many sig figs are in 0.000380?
3 s.f.
What is 45243 written in scientific notation?
4.5243 x 104
A block of wood has a mass of 13 g and a volume of 16 cm3. What is it's density?
0.8125 g/cm3
What is 1205.03 rounded to 3 s.f.?
1210
Which step of the scientific method confirms or rejects your hypothesis?
Analysis/Analyze
How many sig figs are in 25,000?
2 s.f.
What is 4.50 x 10-5 written in long form?
0.0000450
A sample of copper has a mass of 112 g and a volume of 12.5cm3. What is it's density? Will it sink or float in water if the density of water is 1.0 g/cm3
8.96 g/cm3, Sink
What is 0.0004053 rounded to 3 s.f.?
0.000405
If a student's data rejects their hypothesis, what must they do next?
Create a new hypothesis
How many sig figs are in 1020.0030?
8 s.f.
What is 4.6 written in scientific notation?
4.6 x 100
Ethanol has a density of 0.789 g/mL and a volume of 34.5 mL. What is the mass of the ethanol rounded to 2 decimal places?
27.22 g
What is 0.00230139 rounded to 5 s.f.?
0.0023014