Living Things & the Ecosystem
Law of Conservation
Matter cannot be created, nor destroyed.
What is the Greenhouse effect? Name a greenhouse gas, as well, that contributes to the effect.
The warming of Earth's surface by trapping heat from the sun. Ex. Methane
Solid - fixed & doesn't move a lot
Liquid - moves around based on the box
Gas - unstable particles & constantly moving
What is gravity?
a force of attraction (meaning a force that only pulls objects, not pushes)
Ecosystem
All living and nonliving things that interact with each other in an area.
Explain the relationship between a predator and prey.
A predator (an animal that will capture others) will hunt for a typically smaller/weaker animal, called the prey.
Name Earth's four systems.
Atmosphere, Hydrosphere, Biosphere, Geosphere
What's a solution?
when a particle of one material is completely dissolved with the particles of another material and “disappears”
Explain the difference between a light-year and apparent brightness.
A light-year is a quantitative and describes a unit of distance.
Apparent brightness describes how bright a star looks from Earth.
Does ENERGY follow the law of conservation?
No, energy is lost through each transfer.
What is an ecotoxicologist? (Hint: break down the word!)
Eco = environment, toxico = poision
Someone who studies how toxic chemicals/poisons affects the organisms in an environment
What is igneous rock?
forms when melted rock from Earth's mantle come to the surface during a volcanic eruption and cools
What is matter made of?
What phase is the moon in halfway through the month?
Full Moon
How long does Earth take to complete one orbit around the sun?
365.25 days
Symbiotic, Commensalism, Parasitic, Amensalism, Competition
What is weathering? What 2 systems are interacting?
Fill in the blank: all ______ are mixtures but not all mixtures are ______
solutions
How does a sundial work? Where do we see versions of sundials today?
Uses the shadow cast by an object in sunlight to keep track of time during the day.
In watches!
What is thermal conductivity?
describes how well a substance allows heat to pass through it
What's the role of stomata in plant photosynthesis?
They are little opening in the leaves of plants that help to take in CO2 and release O2.
Describe the 3 parts of the water cycle in the hydrosphere.
Water precipitates from the sky onto to earth's surface, evaporation into the sky, and then condenses to form clouds.
Reaction vs State Change
Which travels faster - light or sound?
Light
How does our body know its hungry?
a signal from the hypothalamus (a part of the brain) will be sent to release sugar or fat into the blood stream to distribute to different parts of the body