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Exam #1 25-26

Total questions: 52

Worksheet time: 26mins

Name
Class
Date
1.

Which of the following is heterogeneous?

a)
b)
c)
d)
2.

What is a homogeneous mixture?

a)

mixture that looks the same throughout

b)

mixture of two things only

c)

mixture that doesn't look the same throughout

d)

mixture of one thing only

3.

What is a heterogeneous mixture?

a)

mixture that looks the same throughout

b)

mixture of two things only

c)

mixture of one thing only

d)

mixture that does not look the same throughout

4.

The following picture is a ___________.

a)

solid

b)

gas

c)

liquid

d)

none of the above

5.

The following picture is a _____________.

a)

liquid

b)

gas

c)

solid

d)

none of the above

6.

Which of the following is a compound?

a)

C

b)

H

c)

O

d)

H2OH_2O  

7.

One type of atom is called a _________.

a)

organic

b)

compound

c)

liquid

d)

element

8.

Which of the following is a chemical change?

a)

none of the above

b)

New substances are formed

c)

matter cannot be created or destroyed

d)

No new substances are formed

9.

Which of the following is a physical change?

a)
b)
c)
d)
10.

Which of the following is a chemical change?

a)
b)
c)
d)
11.

Matter cannot be created or destroyed. What law is this?

a)

Law of conservation of mass

b)

Law of the universe

c)

Law of Love

d)

Law of chemistry

12.

Quantitative observations include ___________.

a)

numerical values

b)

non-numerical values

c)

interpretations

d)

organic chemistry

13.

Qualitative observations include _______.

a)

non-numerical values

b)

numerical values

c)

depend on the amount that you have

d)

don't depend on the amount that you have

14.

What was the purpose of the filtration in our lab?

a)

To separate sand from salt water

b)

To separate sand from salt

c)

To separate salt from water

d)

To separate sand from rocks

15.

What is the purpose of a filtration?

a)

To separate a solid from a liquid

b)

To separate based on boiling points

c)

To separate based on size/polarity

d)

None of the above

16.

What technique did you NOT use in the separations lab?

a)

distillation

b)

filtration

c)

evaporation

d)

we used all of the above

17.

Chemistry is the study of __________ and its transformation.

a)

matter

b)

mass

c)

earth

d)

life

18.

Matter is anything that has a _____ and takes up space.

a)

mass

b)

matter

c)

molecule

d)

compound

19.

What does PPE stand for?

a)

Personal Protective Equipment

b)

Personal Protection Equipment

c)

Person Protection Equipment

d)

None of the above

20.

Which of the following in NOT part of PPE?

a)

Lab Coat

b)

Goggles

c)

Gloves

d)

Open Toe Shoes

21.

What is the name of the following picture:

a)

Beaker

b)

Erlenmeyer Flask

c)

Mortar and Pestle

d)

Graduated Cylinder

22.

What is the name of the following:

a)

Mortar and Pestle

b)

Striker

c)

Evaporating Dish

d)

Watch Glass

23.

Which of the following is used to stir?

a)
b)
c)
d)
24.

Which of the following produces a flame?

a)
b)
c)
d)
25.

At the end of the Filtration Lab, what remained in your evaporating dish?

a)

Salt

b)

Water

c)

Sand

d)

All of the above

26.

Why do we wear PPE?

a)

To protect us from chemical and physical hazards

b)

To look cool

c)

To protect us from chemical hazards only

d)

To protect us from physical hazards only

27.

How many sig figs are in the following?

6.7

a)

1

b)

2

c)

3

d)

4

28.

How many sig figs are in the following?

0.00300

a)

5

b)

6

c)

3

d)

4

29.

How many sig figs are in the following?

30001

a)

1

b)

2

c)

3

d)

4

e)

5

30.

How many sig figs are in the following?

888,000

a)

6

b)

2

c)

3

d)

4

e)

5

31.

How many sig figs are in the following?

2.000

a)

1

b)

2

c)

3

d)

4

32.

0.009

a)

1

b)

2

c)

3

d)

4

e)

5

33.

How close a measurement is to the true or accepted value is called __________.

a)

Accuracy

b)

Precision

c)

Chemistry

d)

Measurement

34.

How close multiple measurements are to each other is called __________.

a)

Accuracy

b)

Precision

c)

Chemistry

d)

Science

35.

The following numbers are _______.

32.18 g, 32.19 g, 32.18 g

a)

Precise

b)

Accurate

c)

Both Precise and accurate

d)

Scientific notation

36.

Why do we use scientific notation?

a)

Short hand way for writing very large or small numbers

b)

Short hand way for writing very large numbers only

c)

Short hand way for writing very small numbers only

d)

none of the above

37.

What is the following number in scientific notation?

41000

a)
4.1 x 10^4
b)
410 x 10^2
c)
41 x 10^3
d)
4.1 x 10^3
38.

What is the following number in scientific notation?

0.00035

a)
35 x 10^-5
b)
0.35 x 10^-3
c)
3.5 x 10^4
d)
3.5 x 10^-4
39.

What is the following number in scientific notation?

0.0242

a)
2.42 x 10^2
b)
2.42 x 10^-2
c)
0.242 x 10^-1
d)
24.2 x 10^-3
40.

What is the following number in scientific notation?

670000

a)
0.67 x 10^6
b)
67 x 10^4
c)
6.7 x 10^4
d)
670 x 10^3
e)
6.7 x 10^5
41.

When we mixed the sand, salt, and water, during our separations lab, was this a physical or chemical change?

a)

Physical

b)

Chemical

c)

Both physical and chemical

d)

Neither physical or chemical

42.

When we evaporated off the water during our separations lab, was that a physical or chemical change?

a)

Physical

b)

Chemical

c)

Both physical and chemical

d)

Neither physical or chemical

43.

True or False: You can never work alone in the lab. Ms. Chino must be present to perform labs.

a)

True

b)

False

44.

True or False: You can eat and drink in the lab during lab days.

a)

True

b)

False

45.

True or False: I should always clean up my area when I’m done on lab days.

a)

True

b)

False

46.

If a laboratory fire erupts, immediately…

a)

Notify Ms. Chino

b)

run out the room

c)

throw water on the fire

d)

open the windows

47.

Approved eye protection devices are worn in the laboratory ….

a)

to avoid eye strain

b)

to improve your vision

c)

only if you wear contacts

d)

any time chemicals, heat, or glassware are used

48.

True or False: All chemicals in the lab are to be considered dangerous.

a)

True

b)

False

49.

Long hair in the laboratory must be…..

a)

Cut short

b)

Held away from equipment with your hands

c)

always neatly groomed

d)

tied back or kept entirely out of the way with a hair tie/claw

50.

After completing an experiment, all chemicals wastes should be…

a)

left at your lab station for the next class

b)

disposed of according to Ms. Chino’s directions

c)

dumped down the sink always

d)

taken home

51.

Extra Credit: Who is this?

a)

Snoopy

b)

Woodstock

c)

Capybara

d)

Elmo

52.

Extra Credit: What animal is this?

a)

Capybara

b)

Okapi

c)

Squirrel

d)

Bear

e)

Rat

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