MIXTURES🧪
Which material is made by physically combining two or more substances without forming a new substance?
A. Mixture
B. Element
C. Atom
D. Compound
A. Mixture
What do we call the substance that is dissolved in a solution?
A. Solvent
B. Solute
C. Residue
D. Mixture
B. Solute
Which state of matter can flow and be poured?
A. Solid
B. Liquid
C. Gas
D. Crystal
B. Liquid
What happens when liquid water is placed in a freezer for a long period of time?
A. It melts.
B. It freezes.
C. It evaporates.
D. It condenses.
B. It freezes.
Which tool is best for separating large solid particles from smaller solid particles?
A. Magnet
B. Sieve
C. Thermometer
D. Balance
B. Sieve
A student combines rice grains, beans, and corn in one bowl. What makes this a mixture?
A. The substances can be physically separated.
B. The substances form a new chemical substance.
C. The substances lose their original properties.
D. The substances become impossible to identify.
A. The substances can be physically separated.
A student dissolves powdered juice in water. Which change would make the juice dissolve faster?
A. Using colder water
B. Using larger pieces of powder
C. Stirring the mixture
D. Leaving the mixture completely still
C. Stirring the mixture
Why can a gas be compressed more easily than a solid?
A. Gas particles are farther apart.
B. Gas particles are larger.
C. Solid particles do not exist.
D. Solid particles move faster.
A. Gas particles are farther apart.
You notice tiny water droplets forming on the outside of a glass filled with ice-cold water. Where did these droplets come from?
A. Water vapor in the surrounding air
B. Water leaking through the glass
C. The ice changing directly into water outside the glass
D. The glass producing water
A. Water vapor in the surrounding air
A student has a mixture of metal paper clips and small pieces of paper. Which method would be most effective for separating them?
A. Evaporation
B. Filtration
C. Magnetism
D. Condensation
C. Magnetism
Which mixture would be most difficult to identify as having different components just by looking at it?
A. Pebbles and sand
B. Cereal and milk
C. Vinegar and water
D. Leaves and twigs
C. Vinegar and water
Two glasses contain the same amount of water. Glass A has 2 teaspoons of sugar, while Glass B has 6 teaspoons. Which statement is most accurate?
A. Glass A has a more concentrated solution.
B. Glass B has a more concentrated solution.
C. Both solutions have the same concentration.
D. Neither glass contains a solution.
B. Glass B has a more concentrated solution.
A perfume is sprayed in one corner of a room. After a few minutes, people across the room can smell it. What does this demonstrate about gases?
A. Gas particles stay in one place.
B. Gas particles can spread throughout available space.
C. Gas particles have a definite shape.
D. Gas particles cannot move without being pushed.
B. Gas particles can spread throughout available space.
A puddle disappears after several hours on a sunny day, even though it never reached its boiling point. Which explanation is best?
A. The water underwent evaporation at the surface.
B. The water underwent freezing.
C. The water underwent condensation.
D. The water changed into a solid.
A. The water underwent evaporation at the surface.
A mixture contains water, sand, and dissolved salt. Which sequence would best separate the three components?
A. Filter to remove sand, then evaporate the water to recover the salt.
B. Evaporate first, then use a magnet to remove the sand.
C. Freeze the mixture, then use a sieve to separate everything.
D. Use a magnet first, then filter out the dissolved salt.
A. Filter to remove sand, then evaporate the water to recover the salt.