science m1-2

17 - How an Electric Stove Works

Title

How an Electric Stove Works

Reading Text

An electric stove uses science to cook food. When you turn the knob, electricity flows through a closed path called a circuit. The electricity travels into a metal heating coil on top of the stove. This metal has a quality called resistance. Resistance tries to stop the electricity from moving. This struggle makes the coil turn bright red and become very hot. Then, the heat travels from the hot coil directly to your cooking pot. This movement of heat is called conduction. Thanks to conduction, the food inside the pot cooks quickly.

Activities

Vocabulary

Definitions:

Text: A complete path for electricity to flow.
Text: A force that stops electricity and creates heat.
Text: The movement of heat from one thing to another.
Text: The round metal part of the stove that gets hot.
Text: To move smoothly, like water or electricity.

Items:

Label: Circuit
Answer: A
Label: Resistance
Answer: B
Label: Conduction
Answer: C
Label: Coil
Answer: D
Label: Flow
Answer: E

Fill In The Blanks:

Before: Electricity needs a closed
After: to work properly.
Answer: circuit
Before: High
After: makes the wire get very hot.
Answer: resistance
Before: The heat moves to the pan by
After: .
Answer: conduction
Before: Don't touch the heating
After: when it is red.
Answer: coil
Before: Water and electricity can
After: through lines.
Answer: flow

Scrambled:

Text: path / circuit / is / a / A / closed
Answer: A circuit is a closed path.
Text: heat / creates / Resistance / wire / the / in
Answer: Resistance creates heat in the wire.
Text: moves / pot / Conduction / heat / the / to
Answer: Conduction moves heat to the pot.
Text: red / turns / coil / The / hot / and
Answer: The coil turns red and hot.
Text: knob / Turn / start / the / to / cooking
Answer: Turn the knob to start cooking.

Comprehension

Questions:

Text: A circuit is a path for water.
Answer: false
Text: Resistance makes the coil get cold.
Answer: false
Text: Conduction moves heat from the coil to the pot.
Answer: true
Text: The heating coil is made of plastic.
Answer: false
Text: You need to turn a knob to start the electricity.
Answer: true

Written Expression

Questions:

Text: In your own words, how does the stove get hot?
Text: Why must the bottom of a pot touch the stove coil?

Examples:

The stove gets hot because the resistance in the metal coil stops the electricity and makes heat.
The pot must touch the coil so conduction can move the heat into the food.