Week 7
What is one type of property of a material?
Physical, chemical, observable, measurable
To conduct something means to do what?
To carry it
Why do organisms eat food?
To add matter and grow
What is the source of solar energy?
The sun
Electrical conductivity is the measure of what?
How well a substance carries electricity
The measure of how well light bounces off an object is called what?
Reflectivity
Thermal conductivity measures what?
How well heat is carried
Eat other organisms
What is the process of plants making their own food called?
Photosynthesis
A model that show how organisms interact with each other in an ecosystem is called what?
Food web
The measure of how well an object can resist being scratched is called what?
Hardness
Solubility is a measure of what?
How well a substance dissolves in water
Producers do what for food?
Make their own food
What do the roots do for a plant?
Soak up water
What does the stem do for a plant?
Move nutrients from the roots to the leaves, hold the plant up
For magnets, opposite poles do what?
Opposite poles attract one another
Which kind of materials typically are the most conductive?
Metals
Decomposers do what for food?
Eat dead organic matter
How do humans and plants have a symbiotic relationship?
Humans exhale CO2, which the plants breathe.
Plants exhale oxygen, which humans breathe.
What do the leaves do for a plant?
Absorb sunlight and Carbon Dioxide
How is the color of an object determined?
What light is absorbed by the object and what light is reflected
Conductivity is determined by what?
The number of ions in the substance
Scientists that study the ecosystem are called what?
Ecologists
What are the inputs of photosynthesis? What are the outputs?
Inputs: Water, sunlight, CO2
Outputs: Oxygen, glucose
The scale used to measure hardness is called what?
Mohs scale