Electricity
What is the most efficient light bulb?
LED lamp
What is an earthquake?
Sudden shaking of the ground.
What is reflection?
Bouncing of light from a surface.
What is a rock?
A solid natural material made of minerals.
What is a collision?
When two objects hit each other.
Who created the incandescent light bulb?
Thomas Edison
What tool measures earthquakes?
Seismograph.
What is refraction?
Bending of light when it changes medium.
What are the main types of rocks?
Igneous, sedimentary, metamorphic.
What are the two main types of collisions?
Elastic and inelastic.
When was the incandescent light bulb created?
in 1879
What scale is used to measure magnitude?
Richter scale.
Give one example of reflection.
Mirror image.
How do sedimentary rocks form?
From compacted and cemented sediments.
What happens in an elastic collision?
Energy and momentum are conserved.
Who coined the term electricity?
William Gilbert
Where do most earthquakes occur?
At tectonic plate boundaries.
Give one example of refraction.
A straw looks bent in water.
How does metamorphism differ from igneous formation?
Metamorphism alters existing rocks; igneous forms from cooled magma.
What happens in an inelastic collision?
Momentum is conserved, but energy is partly lost
What material was used in the incandescent lamp?
Carbon (tungsten) filament
Name one way to reduce earthquake damage.
Build earthquake-resistant structures.
What object can refract light?
water
How are rocks linked to tectonics?
Plate movements create and transform rocks.
How does momentum conservation explain collisions?
Total momentum before = total momentum after.