Properties of water
What property tells you how much space an object takes up?
Volume
What happens when a magnet attracts an object?
The magnet pulls the object toward it.
What does the Law of Conservation of Mass tell us?
The mass of a whole object is equal to the sum of the masses of its parts.
Is cutting a piece of paper a physical or chemical change?
Physical change.
What are the three states of water?
Solid, liquid, and gas.
Which property describes how heavy an object is?
Mass
True or False: All metals are attracted to magnets.
False
A toy has a mass of 40 grams. It is broken into two pieces. Will the total mass of the pieces still be 40 grams?
Yes
Is rusting a physical or chemical change?
Chemical change.
What state of water is ice?
Solid.
Name three physical properties that can be used to describe an object.
color, shape, texture, hardness, odor, taste, mass, volume, or attraction to magnets.
Which object is most likely to be attracted to a magnet?
A. Paper clip
B. Plastic bottle
C. Penny
D. Glass cup
A. Paper clip
A block has a mass of 60 g. It is separated into three pieces: 20 g, 15 g, and 25 g. What is the total mass?
60 grams
Which is a physical change?
A. Burning wood
B. Rusting metal
C. Melting ice
D. Cooking an egg
C. Melting ice
What happens to water when it freezes?
It changes from a liquid to a solid.
Which tool can be used to measure the mass of an object?
A scale/balance
What can happen when two magnets are brought together?
They can attract or repel each other.
A whole object weighs 100 grams. After being separated into parts, the parts have masses of 30 g, 40 g, and 30 g. What happened to the mass?
The mass was conserved. The parts still total 100 g.
Name two examples of chemical changes from our unit.
Burning, frying, rusting, grilling, toasting, or decaying plant/animal matter.
A student heats water and observes it changing into water vapor. What state is the water vapor?
Gas
A student wants to compare two rocks. She records their color, texture, hardness, mass, and volume. What is she doing?
She is comparing/classifying the rocks based on their physical properties.
A student places a magnet near a paper clip, a plastic bottle, and scissors. Which objects should the student expect the magnet to attract according to the unit examples?
The paper clip and scissors.
Explain why the mass of an object does not change simply because the object is separated into smaller parts.
The amount of matter has not changed. The mass of the whole equals the combined mass of its parts.
A student observes that a material changes color, produces heat, and gives off a substance. What could this evidence indicate?
It could indicate a chemical change.
Give one example of how people use water in one of its states.
Answers will vary. Students should describe a use of water in a solid, liquid, or gas state.