Electric Cells As Energy Systems Flashcards Preview

Abi Science 2016 > Electric Cells As Energy Systems > Flashcards

Flashcards in Electric Cells As Energy Systems Deck (30):
1

What is an electrolyte?

A solution that is bake to conduct electricity

2

How does a lemon battery work?

Through a chemical reaction

3

What does an ammeter measure?

How fast an electric current flows

4

What does a volt meter measure?

The amount of energy in a circuit

5

What is inside a battery?

A paste made from different chemicals

6

What is a paste?

A solid which behaves like a liquid i.e. Half solid half liquid

7

What is the source of energy in an electric circuit?

A cell or battery

8

What is the difference between a cell and a battery?

A cell is a single source of energy, whereas a battery is a group of cells working together

9

What is a system?

A group of components that work together to perform a common function

10

What does the electric cell system aim to do?

To generate electricity

11

How does an electric cell generate energy?

Through chemical reactions

12

What are the components of a lemon battery?

Lemon
Zinc
Copper
Light bulb
Insulated copper wires

13

How does a lemon battery work?

The lemon juice works as an electrolyte
The zinc and copper act as electrodes
One is positive and one is negative that is to say, one attracts electrons and one gives up electrons
This creates a current
The electrolyte allows the current to flow

14

Does the lemon battery work with only one type of metal?

No

15

What can increase the current in a lemon battery?

Juicy lemons work better
Warm lemons work better
Sink the electrodes deeper in the lemon
More nails
More lemons

16

Why is lemon juice an electrolyte?

It is an acid
It has more hydrogen ions

17

What is an electric current?

A flow of charges

18

Does a battery produce energy outside of a circuit?

No

19

What is an ion?

An atom where the protons and electrons are unbalanced

20

What are the components of a zinc-copper cell?

Beakers
Copper surface solution
Zinc sulphate solution
Sodium chloride/sulphate solution
U-tube
Cotton wool
Copper electrode
Zinc electrode
Insulated copper wires

21

How do you create a zinc-copper battery?

Place the solutions in separate beakers
Connect the electrodes to separate connecting wires
Place the electrodes in their corresponding solutions
Create a salt bridge with the U-tube and the sodium compound
Use the cotton wool to hold the sodium solution in
Place the salt bridge between the two beakers

22

What is a half-cell?

Half of the components of a cell

23

What is the purpose of the salt bridge?

To connect the two half cells

24

How does a zinc-copper battery work?

The zinc electrode releases ions into the zinc solution
The copper solution deposits ions onto the copper electrode
The ions flow through the salt bridge

25

What kind of energy transformation takes place in a zinc-copper cell?

Chemical energy➡️ Electrical Energy

26

How do rechargeable cells work?

An electric current is run through it, which reverses the chemical reaction

27

What are other chemicals which can be used in batteries?

Zinc-carbon
Nickel-cadmium
Nickel-Zinc

28

What is an electric cell?

A system in which chemical reactions take place to convert chemical energy into electrical energy

29

What can be used to construct a simple cell?

An acidic fruit

30

How can a complex cell be constructed?

Two beakers with an electrode and an electrolyte in each. They are connected by a salt bridge