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2nd SW Warm up 5
Contributed by: Ruble

1. Which of the following is NOT an

example of a chemical change?

 

 

Burning wood

Cooking eggs

 Breaking a rock

Dynamite exploding

2. Which of the following IS an example

of a chemical change?

Cutting a loaf of bread

 Hydrogen and Oxygen bonding

Tearing paper

People running

 True

False

3. True or False

Nails rusting is an example of a chemical

change.

 

watts, hour

pounds, inches

length, width

 mass, volume

4. Density is measured by dividing

__________ by __________.

45 g/mL

486 g/mL

 6 g/mL

5 g/mL

5. If an object has a mass of 54 grams, and a

volume of 9mL, what is its density?

Crystal formation always occurs in an experiment.

 No type of reaction occurred

A physical change occurred

This may be evidence of a chemical reaction

6. Mr. Bellman was doing an experiment.

He mixed two substances together in a flask

and noticed that the flask became very cold.

Cold enough to form ice crystals on the outside

of the flask. Mr. Bellman concluded that:

 

7. Mrs. Ruble was doing a demonstration in class. She

began boiling a beaker of water on a hot plate. Over

a period of 5 minutes, students observed steam

rising from the beaker and the level of water in the

beaker had reduced from 500mL to 350mL. This is

evidence of:

 No change has occurred

A change in the state of matter

A chemical change

An oxidation/reduction reaction

11

 7

15

9

8. How many chemical symbols (elements) are

represented in the following formula?

 

HNCaAgOMgPbCuZn

 An ionic bond between two covalent atoms

A chemical reaction

A new element being formed

Radioactive isotope

9. During a lab experiment, two students

observed a faint glow in the beaker. Their substance

began to change color and a slight odor as well as

heat was detected. They concluded that they had

just observed:

Make up matter on earth but NOT in space

They are pure substances

 Are located on the periodic table

Represented by a chemical symbol

10. Which of the following is NOT true about

elements?

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