Which substance forms a solution when mixed with water: salt, oil, sand or rocks?
salt
15
What will happen to an ice cube that is left on a hot sidewalk?
he ice cube will first melt into a liquid and then evaporate into the air as a gas.
20
True or False: Items that are less dense than water SINK.
False
10
A student breaks eggs into a pan and scrambles the egg yolks and egg whites together to make scrambled eggs. How will the state of the scrambled eggs change when heat is added to them?
The eggs will change from a liquid state to a solid state.
25
Based on the information in one of the student’s charts, which fruit does not belong in the same group as the other fruits?
orange
10
A student makes sugar water to put in a hummingbird feeder. She stirs sugar into water until the sugar dissolves. The sugar water is an example of -
a solution and a mixture
20
Which mixture is most similar to a mixture of pebbles and marbles? Marshmallows and hot chocolate, uncooked rice and pennies, air and smoke, or sand and oil?
uncooked rice and pennies
10
A chocolate candy bar is left on a car seat on a hot summer day. What will happen to the chocolate bar?
The chocolate bar will soften
10
Using the terms "less dense than" or "more dense than", how would you describe the density of vegetable oil in a jar with water?
The vegetable oil is less dense than water because it is floating on the top
15
A teacher wants to demonstrate that some substances keep their shape and color when they are mixed. What substances should the teacher use: sugar and water, sugar and milk, salt and water, salt and sand