States of Matter
Describe how ice can turn into a liquid
Heat
How can you measure mass?
Pan balance
Name 3 physical changes.
Varies (It must begin and end with the same kind of matter). Examples: water in liquid form to ice, blending 2 types of clay
Can you see particles? Why or why not?
No, they are too small.
What is the source of all the energy in a food web?
the Sun
Describe how water turns into a solid
freeze
How can you measure volume?
Water displacement
Is an object rusting a physical or chemical change? Why?
Chemical change because it is a new substance.
What are mixtures?
Results of physical changes that can be reversed.
A consumer is an organism that cannot make its own food and a decomposer is an organism that breaks down dead or decaying pant and animal material.
Name 2 properties that all matter has
Has mass and takes up space
Name 3 different properties of matter.
Any of the following: color, hardness, reflectivity, electrical conductivity, thermal conductivity, response to magnetic forces, solubility
Name 3 chemical changes.
Varies ( begins with one kind of matter and ends with another). Example: shiny metal rusting, green leaves changing to red
Can chemical changes be reversed? Why or why not?
No because a new substance is formed.
Give an example of a producer in a forest ecosystem.
A producer is at the base of all food chains. (Grass, clover, leaves)
Describe how particles are arranged in solids, liquids and gasses
Ability to conduct or gain heat
Is changing states (liquid, solid, gas) a physical or chemical change? Why?
Physical because it is still the same substance.
What is conservation of mass?
When a substance changes state, the mass stays the same
In a simple food chain which has the sun --> grass --> rabbit --> fox, where does the fox get its energy from?
The rabbit eats the grass.
How could you test that air has matter?
Varies; example fill a balloon up
What is solubility?
The ability of a mixture to dissolve or not
If water boils and that has less mass, what is the cause of the loss of mass?
Water Vapor (gas) ends up in the air.
How can you tell if something is a metal or nonmetal?
Metal conducts heat, is hard, and is magnetic.
A sample food chain is shown below.
grass → insect → lizard → hawk
Where does the lizard gets its energy from?
The lizard gets its energy by eating the insect which gets its energy from the grass.