Share Science L6 Term 4 Review 2022
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What is radiation? Transfer of energy by waves or by sound?
By waves
Can radiation move through space and matter?
Yes
What is energy from the sun called ?
Solar energy or radiation
Waves with shorter wavelengths have more or less energy?
More
Waves with longer wavelengths have more or less energy?
Less
Microwaves to cook food are 12 cm or 20cm in length?
12 cm
How do microwaves cook food? Heating water molecules or heating the bowl?
Heating water molecules
What energy does a microwave convert to? electrical or thermal energy?
Thermal
Metal is a good material to use when heating food or cooking food in a microwave?
No.
What happens if you use metal in a microwave?
Sparks
Which containers SHOULD you use when heating or cooking food in a microwave?
Plastic ...glass...paper...ceramics
Why would a microwave be more beneficial to cook your food?
Faster and time saving and electricity saving
What is conduction? Moving of heat from one place to another?
True
How does a conventional oven cook food? By heat or by causing the molecules to be active?
Heat
Does a microwave use less or more electricity?
Less as faster cooking time
Explain gravity
Force from the center of earth that keeps us planted on solid ground
