Chapter 5 Electricity Flashcards
Objects charged by rubbing have a ________ electric charge
Static
True or False. The ancient Greeks knew about static electricity
True
Thales was a Greek scientist who discovered static electricity ______ years ago
2500
Benjamin Franklin proved ________ was a big static electric charge
Lightning
He discovered static electricity discharge caused the muscles of a dead frog to twitch
Lungi Galvani
Someone who reacts quickly like being shocked by electricity is said to be
Galvanized
Sheets of iron coated with zinc to keep them from rusting are called
Galvanized iron
He built the first battery
Alessandro Volta
Volta built his battery using cardboard soaked with saltwater and what two kinds of metal
Zinc and copper
Voltas battery produced continuous current flow. True or false
True
Electrons at rest cause ________ electricity
Static
Electrons in motion are called _____ electricity
Current
He was very careless chemist who used unsafe procedures when conducting experiments and tasted and sniffed new chemicals
Humphrey Davy
Davy discovered a process using electricity to separate oxygen from compounds. It is called
Electrolysis
Davy used electrolysis to discover barium, strontium, calcium and _______
magnesium
Who discovered the safety lamp
Humphry Davy
The safety lamp protected miners. It’s flame was protected by a
Metal screen
Davy’s discovered the bright arc light that had electricity jump across two _____ electrodes to generate light
Carbon
Alkali means
From the ash
True or false. Members of the sodium family are non metals
False
Sodium family metals have a silvery luster and conduct
Electricity and heat
True or false. Sodium metals can be cut with a knife
True
True or false. Sodium metals melt at low temperatures and can be drawn out into long wires and hammered into sheets
True
Members of of the sodium family are extremely ACTIVE or INACTIVE chemically
Active
True or false. Sodium metals burn your skin by stripping oxygen from it
True
Sodium is used to make what
Soap, baking soda, salt and window glass
True or false. Potassium can burn water
True
Fires caused by sodium family should be put out with
Dry sand, salt or soda ash
Lithium is the heaviest or lightest metal in the sodium family
Lightest
Lithium batteries are found in
Cameras and calculators
True or false. Sodium family metals give off colors when they burn
True
Why did Robert Wood sprinkle lithium chloride on his dinner meat
To prove the cook was using leftover food
