SC.912.P.8.2 Pre-test

1. What characteristic best describes what happen during a physical change?

A) Form stays the same
B) Mass is lost
C) Composition stays the same
D) Composition changes

2. Which of the following does NOT indicate that a chemical change has occurred?

A) formation of a precipitate
B) melting of a solid
C) color change
D) formation of a gas

3. If the chemical properties of a substance remain unchanged and the appearance or shape of an substance changes what is it called?

A) Chemical change
B) Neither a physical or chemical change
C) Both a physical and chemical change
D) Physical change

4. Which of the following situations represents a chemical change?

A) A strip of magnesium ribbon is broken into many small pieces.
B) A blue solution is mixed with a yellow solution and a brown solid is formed.
C) Ice is placed in a beaker and heated until it melts.
D) A blue solution is mixed with a yellow solution and a green solution results.

5. Which of the following is NOT a physical process?

A) an explosion of dynamite
B) melting ice
C) sharpening a pencil
D) melting ice

6. Alexis is comparing the substances and hot water inside a ceramic cup, and the water vapor above the cup. What can she say about the motion of the particles in all of the substances?

A) They do not move.
B) They move very fast in all directions.
C) They move past each other slowly.
D) They are always moving.

7. To observe a chemical property, you must attempt to change its identity. Which of these statements describes an example of a chemical property?

A) A freshly waxed floor has a bright shine.
B) A painter coats a building with red paint.
C) A metal turns to liquid at a certain temperature.
D) A silver statue begins to tarnish.

8. What type of change occurs when one or more substances are converted into new substances?

A) Physical change
B) Nuclear reaction
C) Chemical change
D) Chemical fusion

9. Luis often leaves his bicycle outside, even when it rains. Luis' bicycle has now begun to rust. How quickly a substance rusts is an example of which of the following?

A) a state of matter
B) a physical property
C) a physical change
D) a chemical property

10. Which change can be easily be reversed?

A) Chemical Change
B) Neither a physical or chemical change
C) Both a physical and chemical change
D) Physical Change

11. Chemical changes result in new substances, but physical changes do not. Which process is an example of a physical change?

A) lettuce rotting in the refrigerator
B) scrap iron rusting over time
C) metal melting in very high heat
D) charcoal burning in a grill

12. Matter is everything around you. All matter has mass and volume. Which of these choices is an example of matter?

A) sound
B) air
C) magnetism
D) light

13. There are several differences between chemical and physical changes. Which process is a sign of a chemical change?

A) A rotting potato gives off a bad smell.
B) A plaster statue breaks when it falls onto the floor.
C) A melting block of ice leaves a large puddle.
D) A cloud quickly changes shape when blown by wind.

14. Which of the following is an example of physical change?

A) Lighting a piece of paper on fire and the paper burns up and leaves ashes.
B) Mixing baking soda and vinegar together, and this causes bubbles and foam.
C) A glass cup falls from the counter and shatters on the ground.
D) Baking a birthday cake for your mother.

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