10 questions
How would you separate flour from rice?
use a filter
add water and then use a filter
use a sifter
use a magnet
Which object would sink in regular water?
mass 5 grams / volume 10 milliliters
mass 15 grams / volume 12 milliliters
mass 25 grams / volume 50 milliliters
mass 55 grams /volume 100 milliliters
How does adding salt to water affect the density of the water?
it increases the density of the water
it decreases the density of the water
it doesn't change the density of the water
it increases the density, but then decreases it after a few minutes
Why are the handles of pots and pans made of plastic or wood?
because plastic and wood are good thermal conductors
because plastic and wood are good thermal insulators
because plastic and wood are good electrical conductors
because plastic and wood are good electrical insulators
Which TWO statements are true about the gas state of matter?
has a definite shape
no definite volume
no definite shape
has a definite volume
the particles are very close together
As heat energy is added to a solid, what happens to the particles in the solid? Choose TWO answers.
they get closer together
they speed up
they slow down
they get farther apart
Think about a saltwater solution. Which statements are true? Select all that apply.
the solute is the salt
the solute is the water
the solvent is the salt
the solvent is the water
Which is native to Mississippi?
magnolia tree
lionfish
kudzu
lion
What is salt best classified as and why?
a compound - because it is formed from the bonding of two or more elements
an element - because it has the same kind of atoms throughout
a mixture - because it can easily be separated into its individual parts
a solution - because salt can be dissolved in water
Which are chemical changes? Select all that apply.
milk turning sour
an apple decaying
eating spaghetti
the Statue of Liberty turning green
butter melting