Light
Where does the light come from?
the sun
What does the word "wave" mean?
A large amplitude wave that forms on the surface of the water.
What is a star?
immense spheres of plasma and gas
What is a plant?
eukaryotic, multicellular, and autotrophic living beings.
Why do birds need feathers?
for flying, providing thermal insulation, protecting their skin, and facilitating visual communication.
What happens if you mix rain with sunlight?
A rainbow
How are waves formed?
primarily through the transfer of energy from the wind to the water surface.
Why do stars shine?
Stars shine by sending heat and light into space.
What is the main function of a plant?
photosynthesis.
Why do some birds molt their feathers and others don't?
to replace worn, damaged or old ones, essential to maintain flight and thermal insulation.
What are the reflection and refraction of light?
Reflection: Light bounces off a surface.
Refraction: Light changes direction when passing from one medium to another.
What does wavelength mean?
It is spatial distance. At sea, it is the distance between the crest of one wave and the next.
What does it mean for a star to have luminosity?
This means that it is a celestial body that produces and emits its own total energy in the form of radiation in all directions.
What parts does a plant have?
root, stem, leaves, flowers and fruits.
parts of a feather?
Barbules, shaft and barb.
Why do we see objects when there is light?
because light (natural or artificial) hits them and is reflected (bounces), traveling towards our eyes, where the brain interprets this information.
What is vibration?
Each vibratory movement, or double oscillation of the molecules or of the vibrating body.
What are the absorption lines?
Nitrogen, carbon, helium, and oxygen.
What is pollination?
fundamental ecological process by which pollen is transferred from the stamen to the stigma of flowers.
Name two different types of feathers
flight feather and downy feather.
What happens to a ray of light when it passes from air to water?
It experiences refraction, which means it slows down and changes direction, bending towards the "normal".
What is wavelength?
It is the physical distance between two consecutive identical points of a periodic wave
What is absorption?
physical phenomenon where the atoms of the outer (cooler) gaseous layers of a star absorb specific photons of the light emitted by the (hotter) interior.
What is the function of roots in a plant?
to provide support and anchorage to the soil, as well as water absorption and nutrient uptake.
What purpose do feathers serve for birds?
to facilitate flight by shaping the wing surface and enabling aerodynamics