Light and Sound
How does Light travel?
Straight Lines
when materials are changed but remain the same materials, what is the change called?
Physical change
What do you call a scientific guess?
hypothesis
What is manufacturing?
how people make products
How does sound travel
in waves
When materials are changed and can not be changed back again, the change is called what?
a chemical change
What do greenhouse gases do?
trap heat around the earth causing climate change
Name 3 sources of light pollution
City lights, advertising signs, car headlights
What are the 3 States of matter
gas liquid solid
Name 3 ways how the sun affect humans negatively?
wrinkles, skin cancer, skin conditions
What is a non-renewable resource
materials that take millions of years to form and can't be easily replaced.
name three natural light sources
fireflies, the sun, aurora borealis
What is noise pollution?
When there are unnatural noises that affect the living things
What is a renewable resource?
Materials that can be replaced naturally in a short amount of time.
What is the Diderot effect?
It's a spiral of never ending consumption or buying
What are the 3 stages of the water cycle
evaporation, condensation, and precipitation