Matter & Energy
What is one physical property used to compare materials?
Mass, volume, density, conductivity,
What type of energy is stored in a battery?
Chemical energy
What is needed to complete a circuit?
Power source, conductors, and a load
What happens when light hits a mirror?
It reflects
What are living parts of an ecosystem called?
Biotic factors
What type of material allows electricity to flow?
Conductor
A toaster changes electrical energy into what two types of energy?
Thermal and light energy
Name one way electrical energy can be transformed
Motion, sound, light, or heat
What is it called when light bends through water or glass?
Refraction
What are non-living parts of an ecosystem?
Abiotic factors
Give an example of an insulator.
Rubber, plastic, wood, glass,
What energy transformation happens in a flashlight?
Chemical → Electrical → Light
What will happen if there is a break in a circuit?
The circuit won’t work; no energy will flow.
What color absorbs the most light?
Black
How does removing one species affect a food web?
It can disrupt the balance, affecting other species
What is one way to test if a material is a conductor?
Try using it in a simple circuit to see if it lights a bulb
What energy transformation occurs when playing music on a speaker?
Electrical → Sound
How does a switch affect a circuit?
It controls the flow of electricity by opening or closing the circuit
What happens when light is absorbed?
It turns into heat energy
Give one example of how humans harm ecosystems.
Pollution, deforestation, habitat destruction
What happens when a material does not conduct electricity?
The circuit is incomplete, and the device will not work
What is an example of an object that transforms energy into motion?
A fan, car, wind turbine
What type of circuit allows multiple paths for electricity to flow?
Parallel circuit
Why does a pencil look bent in water?
Refraction causes light to change speed and direction
Name one way humans can help ecosystems
Recycling, protecting habitats, reducing pollution