Flashcards
Science Test Flash Cards
Cards in this deck (17)
- 1How Do You Identify Atom/Ion Charges?when an atom has 1 electron in it's outer shell that means it's positively charged because it can give that electron away and so forth. also it can be +4 or -4
- 2What Are The Different Units And How Are They Measured?Voltage (V) - voltmeter
Current (A) - ammeter
Resistance (Ω - ohms) - o-meter - 3How Do You Apply OHM's Law?V = Voltage (V)
I = Current (A)
R = Resistance (Ω)
- 4Where Do You Put A Voltmeter Into A Circuit?always put voltmeter in parallel. it measures the difference between two points in a circuit so it must be in parallel
- 5Where Do You Put An Ammeter Into A Circuit?always put ammeter in series. it measures the flow of electrons therefore the electrons must flow through it so it must be in series
- 6How Does Resistance Of A Wire Work?the resistance of a wire is how easy it is for current to flow through it. the thicker the wire - less resistance. material - the more conductive the better (copper - low , iron - high) and the length (longer - more, shorter - less)
- 7What Does A Transformer Do?transformers can change the voltage (higher or lower) and is safer at a lower voltage
- 8What Is A Parallel Circuit?it's when more than one path goes back to the battery. multiple switches, add more globes without it dimming.
- 9What Is A Series Circuit?only one switch. it’s a cheaper circuit because less wire. the current flows through one path and if you add globes they share the voltage
- 10Which Circuit Is Better? Parallel or Series and Why?parallel is better than series in many situations because there is more than one path that the current can flow
- 11What Are Some Different Conductors and Insulators?conducters - most types of metal
insulators - rubber, corks, plastic - 12What Are The Symbols In A Circuit?
- 13What Is A Wet Cell?they've liquid and are often larger and heavier. the liquid is electrolyte and has two or more metals. it's normally copper and zinc or copper and lead - because one is more reactive than the other. one wants to collect electrons and the other wants to lose them making electrons flow across
- 14What Is A Dry Cell?dry cells are smaller and lighter and generally won’t spill the corrosive paste inside (e.g. remote battery)
- 15What Happens When You Add A Battery To A Circuit?you add it voltage so if you had one 2V battery, you only have 2V but if you add three 2V batteries you have 6V
- 16What Are Some Facts About A Fuse?it has high resistance, low conductivity and a low melting point. when resisting the flow of electrons, the electrons slow and get hot. it protects components in a circuit if something short circuits. when it breaks the current stops flowing.
- 17What Is A Circuit Breaker?it is a bit of curved metal. expands when it heats up and blocks the circuit, contracts when it cools down and the circuit reconnects. a circuit breaker doesn’t have to be replaced
Information
- Description
- This is to help anyone with a science test that consists of circuits, atoms and units
- Created by
- Georgie M · Aug 2016
- Updated
- Aug 23, 2016
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