States of Matter
What are the states of matter?
Solid, Liquid, and Gas
What is the engineer design process (in general)?
A step-by-step process engineers use to solve problems and create innovative products, systems, or processes.
What number planet is Earth from the Sun?
3rd!
Physical or chemical change: Paper burning to ash.
Chemical!
What is the atmosphere?
Gases on Earth.
Do particles move in a solid?
Yes, but only vibrate in place.
What do engineers do?
Design and build things to make our lives easier.
Name one of the main gases in Earth's atmosphere.
Nitrogen (78%), Oxygen (21%), all other gases (1%).
Physical or chemical change: Rain falling from clouds to the ground.
Physical!
What is the role of decomposers in the ecosystem?
They break down dead organisms and return nutrients to the soil.
What is precipitation?
Water falling from the sky in all forms (rain, snow, sleet, hail).
What is a prototype and why is it important?
A model used to test a design before final building.
What is the outermost layer of Earth called?
Crust.
Physical!
What are the 4 spheres we learned about this year?
Atmosphere, Hydrosphere, Geosphere, and Biosphere
Why do gases fill any container they are in?
Their particles move freely in all directions.
What are constraints in engineering?
Limitations (time, budget, workers).
What is most of Earth's surface covered with?
Water!
Physical or chemical: Acid rain being formed from excess acidic gases in the atmosphere.
Chemical!
What type of consumer eats both plants and animals?
Omnivore.
Give an example of each state of matter. All have to be correct.
Why might engineers redesign something that already works?
To make it better, cheaper, or safer.
What is the hottest layer of Earth called?
Inner core.
Can a physical change be reversed? Give an example.
Yes; freezing water back into ice.
Why are producers important in every ecosystem?
They make their own food and provide energy for all other organisms.