solvents, solutes, and solutions!
what is the universal solvent?
water
what are fossil fuels?
list some examples of external forces
wind, rain, snow
is fire matter
yes
true or false we breath 10,000 liters of air a day
true
what is a solute?
the substance that is being disolved
list 4 examples of renewable energy?
solar, wind, water, heat
what is the difference between a dynamic load and a static load?
a dynamic load is a load that changes weight
example: a person
a static load is a load that weight stays the same
example: an orange
true or false: physical changes can never be undone
false
some physical changes like ice melting can be undone
how many muscles does the human body have?
600
what is a solvent?
the substance that is doing the disolving
what fossil fuels are made when a dinosour dies in the water?
natural gas, oil
what is shear force?
opposite or parallel force
wwhat are the 3 main states of matter
liquid, gas, solid
your brain stem controls and regulates what?
controls your spinal cord
regulates your heart rate and breathing
what is a solution?
looks like a pure substance but is really a mixture
what are the cons of solar power?
when the sun is not shining then the solar panels cant take in the suns heat
list the four internal forces
torsion- twisting in a circular motion compression- push or compress tension- pull or stretch shear- oposite or parallel
give three examples of chemical change
log burning, baking cookies, rusting
the trachea branch into two tubes called what
branchi
what are the solutes in coffee?
coffee grains, sugar, cream, milk
list 3 examples of biofuels
canola, soybeans,corn
what is the difference between a live load and a dead load?
a live load is when there are things somwhere
example: people on a bridge
a dead load is where there is nothing but things like gravity are still there
example: nobody on a bridge but gravity is still there
when you make cookies is that a physical or chemical change?
both
you use the ingredients to make the batter changing their physical form
baking the cookies is a chemical change
what surrounds an animal cell?
cell membranes