Food Webs & Energy Flow
In a food web, all energy originally comes from the ______
The Sun
Matter that keeps its own shape is a ________
Solid!!
Salt and water make a ________
Solution
Materials that let heat pass through them easily are called _____
Conductors
When salt dissolves in water, it forms a ________
Solution
An animal that only eats plants is called
Matter that changes in shape but not volume
Liquid
Does mixing salt and water create a new substance?
NO
insulators
Compare the properties of salt and water BEFORE and AFTER they are combined into a solution
Before: Salt = Solid Water = Liquid
After: Salt = Dissolved but still there
What happens to energy as it moves from producers to consumers?
It decreases (less energy at higher levels)
What matter am I describing
Packed tightly = __________
Spread out to fill container =________
packed tightly = SOLID
Spread out to fill container = Gas
What tool helps you pick out solid pieces - like wooden tiles - from a mixture?
Forceps
Which material would melt ice the fastest? Metal, Plastic, or fabric?
Metal it's the best conductor
Organisms break down dead things and return nutrients to the soil are called?
Stays the same!
When heating a saltwater solution on a hot plate, what must you do to get the salt back?
Evaporation
Environmental change: If the temperature slowly increases each day, what type of change is that?
A slow environmental change
Echolocation means animals send out high-pitch sounds and listen for what?
Echo bouncing back
If the population of rabbits decreases, and the fox preys on rabbits, what will happen to the fox population in a the food web?
Fox population will decrease
If sand sinks and oil floats in water, what does that tell you?
Sand is more dense than water and oil is less dense than water
Measuring mass after forming a solution - does the mass change?
No! Mass ALWAYS stays the same
A metal spoon heating up in soup is an example of _____
thermal conductor
they cant see well in the dark and need sound to locate prey