Safety
Separating Mixtures
Identifying Mixtures
Measurement
Density
100
1. What does it mean if a substance is flammable?
a. it is poisonous
b. it will start on fire
c. it can burn skin
d. it is liquid
b. it will start on fire
100
6. What types of properties do we use to separate mixtures?
a. physical properties
b. density
c. chemical properties
d. size
a. physical properties
100
11. Which of these is a chemical property?
a. more dense than ethanol
b. volume
c. reacts with copper chloride
d. physical appearance
c. reacts with copper chloride
100
16. What unit do we measure mass in?
a. grams (g)
b. milliliters (mL)
c. cubic centimeters (cm3)
d. grams per milliliter (mL)
a. grams (g)
100
21. A piece of glass sinks in water. It is:
a. more dense than water
b. less dense than water
c. same density as water
a. more dense than water
200
2. What does it mean if a substance is corrosive?
a. it is poisonous
b. it will start on fire
c. it can burn skin
d. it is liquid
c. it can burn skin
200
7. What kind of mixture is a stick of gum?
a. physical mixture
b. chemical mixture
c. heterogeneous mixture
d. homogeneous mixture
d. homogeneous mixture
200
12. Which of these is NOT a physical property?
a. it is a liquid
b. it is a blue powder
c. it has a density of 3.1 g/cm3
d. it reacts with bleach to form a gas
d. it reacts with bleach to form a gas
200
17. What is the BEST unit to measure a liquid in?
a. grams (g)
b. milliliters (mL)
c. cubic centimeters (cm3)
d. grams per milliliter (mL)
b. milliliters (mL)
200
22. Tar has a density of 1.98 g/mL. Water has a density of 1.0 g/mL. The tar will:
a. Sink because it is more dense
b. Sink because it is less dense
c. Float because it is more dense
d. Float because it is less dense
a. Sink because it is more dense
300
3. When working with unknown substances, should you assume it is:
a. toxic
b. corrosive
c. flammable
d. all of the above
d. all of the above
300
8. What is the difference between a sieve and filter?
a. filters are for physical properties, sieves for chemical properties
b. filters are for chemical properties, sieves for physical properties
c. filters are for tiny particles, sieves are for particles you can see
d. filters are for particles you can see, sieves are for tiny particles
c. filters are for tiny particles, sieves are for particles you can see
300
13. You have a red square. It does NOT conduct electricity. What could it be made from?
a. Copper
b. HDPE plastic
c. Iron
d. Aluminum
b. HDPE plastic
300
18. Which of these measurements is rounded to the nearest tenth of a centimeter?
a. 40 cm
b. 4 cm
c. 4.2 cm
d. 4.29 cm
c. 4.2 cm
300
23. A sample has a mass of 25 grams and a volume of 5 mL. What is its density?
a. 125 g/mL
b. 25 g/mL
c. 5 g/mL
d. 0.2 g/mL
c. 5 g/mL
400
4. What is the BEST safety precaution to use when working with flammable substances?
a. do not inhale fumes
b. wear gloves
c. wear goggles
d. tie hair back
d. tie hair back
400
9. What would the BEST tool be to separate iron nails and rice?
a. magnet
b. forceps
c. filter
d. funnel
a. magnet
400
14. Tungsten, zinc, and copper are all more dense than water. Tungsten and copper react with acid. Your sample does not react with acid. What is it made from?
a. Tungsten
b. Zinc
c. Copper
d. Not enough information
b. Zinc
400
19. What method is better to measure the volume of a bumpy stone?
a. measure method
b. water displacement method
c. either method will give you the EXACT same answer
b. water displacement method
400
24. A box is 10 mL and 5 g. What is its density?
a. 0.5 g/mL
b. 2 g/mL
c. 15 g/mL
d. 50 g/mL
b. 2 g/mL
500
5. What is the BEST safety precaution to use when working with toxic gases?
a. do not inhale fumes
b. wear gloves
c. wear goggles
d. tie hair back
a. do not inhale fumes
500
10. What would the BEST tool be to separate sand and water?
a. magnet
b. forceps
c. filter
d. funnel
c. filter
500
15. PS and PVC are more dense than water. Your piece of plastic sinks in water. What is it made from?
a. PS
b. PVC
c. Not enough information
c. Not enough information
500
20. Nanette is measuring the volume of a paperclip. Her initial volume is 20 mL. Her final volume is 22 mL. What is the volume of the paperclip?
a. 20 mL
b. 22 mL
c. 2 mL
d. 42 mL
c. 2 mL
500
25. A student is trying to calculate the volume of a cylinder. It has a diameter of 4 cm and a height of 10 cm. The student writes the following:

v = (2 cm)*(3.14)*(10 cm)

What did the student do wrong?
a. didn’t find the radius
b. didn’t square the radius
c. didn’t use pi
d. didn’t use the height
b. didn’t square the radius
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