Ecosystems
What is biodiversity?
the variety of life on earth
What type of energy does a moving object have?
kinetic
What causes wind?
uneven heating of Earth
What is a renewable resource?
a resource that can be naturally replaced quickly
How does biodiversity help an ecosystem survive change?
more biodiversity=more stability because organisms can replace roles if one is lost
How does energy change when a roller coaster goes downhill?
potential energy changes into kinetic energy
Why does warm air rise and cool air sink?
due to density
Give one renewable and one nonrenewable example
renewable-solar
nonrenewable-coal
answers may vary
What happens if producers decrease in a food chain?
consumers would decrease because less energy/food is available
Compare conduction and convection
conduction:heat transfer through direct contact
convection: heat transfer through movement of fluids (air/water)
How does uneven heating create convection currents?
warm air rises, cool air sinks to create convection currents
Why are renewable resources better long-term?
they don't run out quickly and are more sustainable
How would removing a predator affect an ecosystem?
prey populations increase, which can lead to overconsumption of producers
What happens to energy when frictions slows an object?
energy changes into thermal (heat) and sometimes sound energy
How do ocean currents affect climate?
warms currents heat nearby land; cold currents cool it
areas are warmer near warm currents and cooler near cold currents
A city wants to switch to wind energy. What is one possible challenge they might face and why?
wind is not constant; no wind=no electricity; this could lead to times where there is not enough energy.
Explain how energy flows through a food web and why it matters?
energy flows from producers to consumers to decomposers; it supports survival and balance
Explain how energy is transformed in a real-life example
answers may vary
energy is not lost, only changed
Explain how wind patterns form and move
uneven heating and earth's rotation create global wind patterns
Give a solution that reduces energy use in a city
use solar/wind energy reduces pollution and saves energy