Ecosystems
Animals that eat only plants are called ______.
herbivores
What are the three types of variables?
Independent
Dependent
Controlled/Constant
This system is responsible for support, protection of vital organs, and movement.
Mixture or solution?
Trail mix
mixture
Name the 4 spheres of Earth's systems
________ are producers because they make their own food.
Plants
What is the formula for a testable question?
How will/does the IV affect the DV?
This organ is responsible for the exchange of oxygen and carbon dioxide
lung
True or False
Solutions are a type of mixture
True
Why does the sun appear to be so bright in the sky?
Herbivores, carnivores, and omnivores are types of _______.
consumers
How will the height from which the ball is dropped affect the height of the first bounce?
What is the independent variable?
height from which the ball is dropped
The stomach is part of the _______ system.
How would you separate a mixture of salt and water?
Evaporate the water by heating it and collect the salt left in the container.
Tell one way the atmosphere and biosphere interact
Examples include:
Humans (biosphere) breathe in oxygen and breathe out CO2 from the atmosphere.
Plants (biosphere) produce oxygen for the atmosphere.
What is the source of energy in most ecosystems?
A student wants to conduct a test to see which brand of fertilizer works best.
Procedure one: Add 50 mL water to plant each day. Add 50 mL of Fertilizer A to the plant each week. Measure the height of the plant at the end of each week.
Procedure two: Add 100 mL water to plant each day. Add 50 mL of Fertilizer B to the plant each week. Measure the height of the plant at the end of each week.
Is this a fair test? Why or why not?
This is not a fair test because more than one thing is being changed (the amount of water and type of fertilizer). There should only be one independent variable in a fair test.
How would you separate a mixture of salt, sand, and iron filings?
Use a magnet to get the iron filings out. Then add water to the mixture. Use a filter to separate out the sand. Then heat the water solution to evaporate the water, leaving the salt behind.
During which season do we have the most amount of daylight?
summer
What two things are passed in an energy pyramid?
Energy and matter
A student wants to test which brand of paper towels absorbs the most water. The student takes the same size of 3 different brands of paper towels and soaks them in water for 10 seconds. The student wrings out the the water into a different container and measures how much water came out.
What are the independent, dependent, and controlled variables?
IV: brand of paper towel
DV: amount of water that came out
CV: size of paper towel, amount of time in water
Name one way fish and reptiles are the same and one way they are different.
Similar: both lay eggs, both are ectotherms, both have a backbone
Different: fish use gills to breathe, while reptiles use lungs; fish have smooth, slimy skin while reptiles have rough, dry skin
Homogenous or heterogenous?
Lemonade powder in water
Homogenous
What creates Earth's seasons?
The tilt of Earth's axis while revolving around the sun