#2: Multiple Choice
How can a new substance be formed? BURNING MATTER—(Chemical Change)
What has the best solubility in water? Circle one: SAND, PAPER, SUGAR, ICE
What happens when you mix salt and water? PHYSICAL CHANGE
Which is NOT buoyant in water? Circle one: A STICK, A PENNY, A RAFT, A CORK
What has more mass- a pencil or a dog? Why? A DOG BECAUSE IT TAKES UP
MORE SPACE
#4 POSSIBLE ESSAY QUESTIONS
Compare the relationship between particles in ice, water, and water vapor.
You can draw a picture of the particles instead of using words (be sure to label
which is the ice, water, and water vapor).
THE PARTICLES IN ICE ARE CLOSE TOGETHER IN
NEAT, EVEN STACKS. PARTICLES IN WATER SLIP
PAST EACH OTHER. PARTICLES IN WATER VAPOR
DO NOT STAY CLOSE TOGETHER.
Using the terms volume and mass and their definitions, compare a cup of
popped popcorn with a cup of cooked rice.
THE VOLUME MAY BE THE SAME, BUT THE RICE HAS
A HIGHER MASS THAN THE POPCORN. THE
POPCORN IS LESS DENSE.
Describe how the arrangement of particles of water is different in its liquid
and solid states.
PARTICLES IN SOLID WATER ARE CLOSE TOGETHER
AND MOVE BACK AND FORTH AROUND ONE POINT.
IN LIQUID WATER, THE PARTICLES ARE CLOSE
TOGETHER BUT MOVE FROM PLACE TO PLACE.
When a solid dissolves completely in water, what happens to the particles that
made up the solid? (Think of sugar water)
WHEN A SOLID DISSOLVES IN WATER, THE
PARTICLES SPREAD OUT. IF YOU HEAT THE
SOLUTIONS SO THE WATER EVAPORATES, THE
WATER GOES AWAY AND THE PARTICLES OF THE
SOLID ARE LEFT BEHIND.