SCIENCE
An educated guess at the answer to a scientific question.
Hypothesis
The study of matter and its changes.
Chemistry
A 25.00 g object is weighed in the lab. The results come back as 24.99 g, 25.00 g, and 25.01 g.
Were these measurements accurate, precise, or both?
Both accurate and precise
How many significant figures in this measurement?
5,280 feet
3 SFs
DAILY DOUBLE! 100 points each!
What are the 2 states of matter that are considered "fluids?"
liquids
gases
A conclusion that leads to more hypotheses and conclusions, eventually becoming very broad.
Theory
Anything that can do work and/or produce heat.
Energy
Put this into scientific notation:
15,000,000,000 m
1.5 x 1010 m
How many significant figures in this measurement?
0.002010 g
4 SFs
State of matter with indefinite shape, but definite volume.
Liquid
A very well-tested hypothesis that describes a natural phenomenon.
Law
same mass
different (less) weight
4.31 x 10-6 g
0.000 004 31 g
Measure the crayon using the correct number of significant figures based on the ruler.
7.08 cm
7.09 cm
7.10 cm
List it out! 100 points per correct answer! Up to 600
Make a table with physical properties of water on the left and chemical properties of water on the right. List up to 3 physical and 3 chemical properties of water.
Physical: clear/colorless, freezes @ 0oC, boils @ 100oC, odorless, tasteless, liquid/fluid @ room temp
Chemical: not flammable, reacts w/acids and bases, not highly reactive
The 4th step in the scientific method. This is when data is collected.
Analysis/observation
What are the 2 types of pure substances?
Elements
Compounds
Multiply:
4.0 x 106 x 2.0 x 103
8.0 x 109
Make the calculation and round your answer to the correct number of significant figures:
2.085 cm + 3.5 cm
5.6 cm
Term for any type of data that involves numbers.
Quantitative data
Why did the can of Coke sink while the can of Diet Coke floated in water?
Coke has sugar, Diet Coke has sweetener (much lighter)
A mixture that has uniform appearance. It does not look like a mixture.
Bonus 500 points if you can give a second name for this type of mixture.
Homogenous
Bonus: solution
Divide:
6.0 x 1012 / 6.0 x 104
1.0 x 108
Make the calculation and round your answer to the correct number of significant figures:
3.1 g / 0.0200 cm3
160 g/cm3
DAILY DOUBLE! 500 points each!
What are the 2 countries besides the United States that do not use the Metric system as their primary system of measurement?
Liberia
Myanmar