Modeling Matter CJ Practice Question Preview (ID: 48549)
A Review Of Modeling Matter.
TEACHERS: click here for quick copy question ID numbers.
Which of the following is a pure substance (not a mixture)?
a) water
b) soda
c) cereal and milk
d) jello
A solid chocolate bar is heated so it melts. How will the speed of its particles change?
a) Its particles will move slower than before.
b) Its particles will move faster than before.
c) Its particles will move at the same speed as before.
d) All of these answers are correct.
Why did the color dyes separate from the food coloring mixture?
a) The water molecules were attracted to the dye molecules and separated them as the water rose up the paper.
b) The water molecules caused the dye molecules to change color.
c) The water molecules changed the dye molecules from a pure substance into a mixture.
d) The food coloring did not separate.
What caused the four objects to separate in the FAN chromatography experiment?
a) water (rose up the paper)
b) wind (moving air)
c) water and wind
d) none of these
What ingredient is Good Food Production worried is in their food coloring?
a) yellow dye # 44
b) blue dye # 15
c) orange dye # 3
d) red dye # 75
Which of the following explains what happened to the food coloring during the chromatography experiment?
a) The water made the food coloring change colors from black to red, orange, green, and blue.
b) The water made the food coloring molecules stretch and get bigger.
c) The water made the different color dye molecules move different lengths up the paper so they spread out.
d) The water changed the ink from a substance into a mixture.
A student has a glass of milk and a glass of orange juice. Are these two liquids made from the same molecules?
a) Yes, since they are both liquid.
b) Yes, since they both are mixtures.
c) No, they have different properties.
d) No, milk is made of atoms and orange juice is made of molecules.
When two or more atoms are joined together, it is called a:
a) molecule
b) atom
c) comboatom
d) none of these
You have a bag of sugar and a box of salt. Are these two substances made from the same molecules?
a) Yes, since they are both solids.
b) Yes, since they are both white.
c) No, sugar is made of atoms and salt is made of molecules.
d) No, they have different properties so they must be made of different molecules.
Four students are talking about the chromatography experiment in science class. Which student is correct?
a) Student B says that the water made the food coloring molecules strech out and get bigger.
b) Student D says that the water changed the food coloring from a substance into a mixture.
c) Student A says that the water made it change from colors from black to orange, pink, and blue.
d) Student C says that the water made some of the dye color molecules move farther up the paper than other dye colors.
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