Review for Ch. 4 Test
What is the difference between a mixture and a compound? Compounds are chemically bonded and mixtures are not. Therefor, components of mixtures retain their properties but components of compounds do not retain their properties. Mixtures can be separated by physical means and compounds cannot.
If you were given a substance how could you determine if it was an element mixture or compound? Try to separate by physical means like filtration centrifuge or magnet. If it separates it is a mixture if it doesn't separate it is either a compound or element. Try to separate by chemical means like reacting or heating if it separates then it is a compound. If neither chemical or physical means work then it is an element.
Relationships in Science
Example In Boyles Law the relationship between Pressure and Volume is as pressure increases volume decreases.
For solubility of a solid in a liquid as temperature increases solubility of the solid increases. For the solubility of a gas in a liquid as temperature decreases the solubility of a gas increases. That's why we like to keep our pop in the fridge.
Some animals like pit vipers have special heat sensors that allow them to see a thermal image along with the visual image. To learn more about these sensors watch the video above.
Scientists have learned how to take pictures of heat using special cameras. Those cameras have many uses including military, law enforcement, energy efficiency studies, mechanical inspections and more. The picture on the right shows places where this home is losing heat. Insulation can be added in areas in red to most efficiently help this home owner save energy.
Infrared cameras take pictures of heat. Making images like that on the left possible. A previously unseen man hides in the greenery, but can't hide from the infrared camera. To learn more about how thermal imaging cameras work watch the video below.
GRAVITY
Atomic Theory
Physical Science classes watched video series Structure of the Atom 1-4. Click on the video below and choose to watch on youtube the next videoin the series will be available to watch after completion of number one.
Watch these awesome videos from ESPN:
MOMENTUM
SCIENCE OF GYMNASTICS
CLICK ON THIS LINK FOR MORE SCIENCE OF SPORTS CLIPS FROM ESPN
NEWTON'S LAWS OF HOCKEY Watch for every action there is an equal and opposite reaction