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2023 Year 7 I am a scientist test revision

Total questions: 101

Worksheet time: 1hrs 5mins

Name
Class
Date
1.

You should never ______ chemicals in the lab without your teachers permission.

a)

taste

b)

touch

c)

smell

d)

all of the above

2.
If you are not sure what to do during a lab activity:
a)
guess
b)
change lab partners
c)
ask a teacher
d)
just sit quietly and do nothing
3.
Keeping your work area neat and clean is important because:
a)
My teacher is a neat-freak
b)
I won't lose my supplies in the clutter.
c)
It keeps the room from looking messy.
d)
It helps prevent accidents.
4.

Playing around disrupting other students in the laboratory is -

a)

helpful.

b)

allowed

c)

dangerous.

d)

the quickest way to do a job.

5.

Whose responsibility is it to help clean up the lab and classroom?

a)

1st period, the next morning

b)

custodians.

c)

each and every student.

d)

only the teacher.

6.
When in the lab you should wear...
a)
open-toed shoes.
b)
sandals.
c)
closed-toes shoes.
d)
no shoes.
7.

Which of the following items are considered safety equipment in our classroom?

a)

Eyewash Station

b)

Emergency Shower

c)

Fire Extinguisher

d)

All of the Above.

8.
You should report accidents to the teacher __.
a)
after the class is over
b)
immediately 
c)
the following day
d)
never
9.

When should you read the lab instructions?

a)

After starting the lab

b)

When your teacher tells you to

c)

Before starting the lab

d)

It doesn't really matter. Instructions are silly!

10.

Which of the following are examples of dressing appropriately in the lab?

a)

Pulling long hair back

b)

Leaving long hair down to get in the chemicals.

c)

Wearing sandals

d)

Wearing baggy long sleeves

11.

Bob and Lizzy are working in the lab. They are goofing off and break a glass beaker. Which rule did they break?

a)

Know the location of the safety equipment.

b)

Do not eat or drink in the lab.

c)

Read instructions.

d)

No playing around!

12.

When is it OK to eat or drink during a lab?

a)

Always

b)

Never

13.

If you break glassware in the lab, you should...

a)

Tell the teacher

b)

Clean it up quickly before the teacher notices

c)

Scream at the top of your lungs

d)

Scoop it under the lab table

14.
When in the lab...
a)
long sleeves and loose clothing should be rolled up
b)
closed toe shoes should be worn
c)
long hair should be pulled back
d)
all of the above
15.

If your teacher instructs you to smell a chemical, you should do so carefully in a wafting motion.

a)

True

b)

False

16.

If you do not understand a direction or part of a lab procedure, you should

a)

skip it and go on to the next part.

b)

ask the instructor before continuing to work

c)

try different ideas until something works

d)

figure it out as you do the lab

17.
It’s okay to pick up broken glass with your bare hands as long as the glass is placed in the trash.
a)
True
b)
False
18.

You should wear googles to -

a)

to look cool

b)

to block out sunlight

c)

protect your eyes from chemicals

d)

protect your ears from loud sounds

19.

Approved goggles are worn in the laboratory -

a)

to avoid eye strain

b)

just to improve your vision

c)

only if you don’t wear glasses

d)

any time chemicals, heat or glassware are used

20.

What do you do if a fire breaks out during a lab?

a)

Run!

b)

Tell the teacher

c)

Just watch it burn

21.

why do we use goggles/eye protection?

a)

to stop our eyes from hurting

b)

to help you see the board

c)

to look cool

d)

to protect your eyes from chemicals, heat, or broken glassware

22.

after completing an experiment, all chemical waste should be

a)

left at your lab station for the next class

b)

disposed of according to your teacher's instructions

c)

dumped in the sink

d)

taken home

23.

What is used to measure (but not precise), heat, and mix large amounts of liquids?

a)

beaker

b)

flask

c)

test tube

d)

graduated cylinder

24.

What equipment allows you to see small objects?

a)

beaker

b)

compound light microscope

c)

flask

d)

test tube

25.

What equipment allows you to measure liquid's volume and measures in milliliters?

a)

test tube

b)

beaker

c)

flask

d)

graduated cylinder

26.

Which equipment holds, measures, and mixes liquids (not a precise measurement), and measures in milliliters?

a)

flask

b)

test tube

c)

beaker

d)

graduated cylinder

27.

Which equipment holds liquids and allows reactions in a small space?

a)

test tube

b)

hot plate

c)

dropper

d)

beaker

28.

Which equipment heats objects with an open flame?

a)

hot plate

b)

thermometer

c)

bunsen burner

d)

beaker

29.

This is used to pour lab materials into an object with a small opening

a)

scoop

b)

funnel

c)

bunsen burner

d)

goggles

30.

This is used to protect your eyes during an experiment

a)

scoop

b)

funnel

c)

bunsen burner

d)

goggles

31.

This is used to hold test tubes

a)

test tube holder

b)

eye wash

c)

eye dropper

d)

lab apron

32.

This is used to store and mix chemicals during an experiment

a)

fire extinguisher

b)

thermometer

c)

beaker

d)

tongs

33.

This is used to find the amount of heat in an object (temperature)

a)

fire extinguisher

b)

thermometer

c)

beaker

d)

tongs

34.
Identify the equipment shown here:
a)
concave glass
b)
convex glass
c)
watch glass
d)
glass plate
35.
This piece of equipment is used to mix liquids together.
a)
glass stirring rod
b)
scalpel
c)
probe
d)
test tube
36.
a)

evaporating dish

b)

watch glass

c)

mortar and pestle

d)

funnel

37.
a)

evaporation

b)

watch glass

c)

mortar and pestle

d)

funnel

38.
a)

crucible tongs

b)

beaker tongs

c)

forceps

d)

tweezers

39.
a)
wire mesh
b)
wire gauze
c)
wire fence
d)
hot mitt
40.
a)
test tube holder
b)
test tube rack
c)
test tube tray
d)
test tube dryer
41.

Used for moving small amounts of solid from place to place.

a)

spatula

b)

beaker

c)

tube

d)

microscope

42.

Used for moving small amounts of liquids from place to place.

a)

pipet

b)

crucible

c)

micro pipet

d)

all of these

43.

Identify the item in the picture. This item is used in labs to separate tissues or to hold skin when dissecting.

a)

forceps

b)

fork

c)

twizzers

d)

none of these

44.

What is the measurement?

a)

36 ml

b)

40 ml

c)

38 ml

d)

37 ml

45.

What is the measurement

a)

55 ml

b)

56 ml

c)

53 ml

d)

54 ml

46.

What is the measurement?

a)

20 ml

b)

15 ml

c)

14 ml

d)

19 ml

47.

What is the curved area of liquid in a graduated cylinder called?

a)

Miscus

b)

Meniscus

c)

Minced

d)

Misses

48.

How do I look at a graduated cylinder to get an accurate reading of the amount?

a)

Look eye level to the liquid

b)

Look from above the liquid

c)

Look below the liquid

d)

Look through the top of the cylinder

49.
Which part of the Bunsen flame is the hottest?
a)
A
b)
B
c)
C
d)
D
50.

The gas should be turned on ____________ lighting the match.

a)

Before

b)

After

51.
When should you tie back long hair or baggy clothing?
a)
When working with chemicals
b)
When working with a Bunsen burner
c)
When doing dissections.
d)
Any time you are working in the lab.
52.

What do you call the part of the burner that "twists" ?

a)

Base

b)

Collar

c)

Cylinder

53.

To produce the most heat, you should twist the collar until you see ______

a)

A dark blue cone

b)

An orange cone

c)

A yellow cone

d)

A light blue cone

54.

Name this part of the Bunsen Burner: A

a)

Barrel

b)

Collar

c)

Air Hole

d)

Base

55.

When the air hole is closed, what color is the flame?

a)

Blue/Yellow/Orange

b)

Dark and Light Blue

56.

During an experiment, a bunsen burner is placed on:

a)

Gauze mat

b)

The laboratory bench

c)

A heatproof mat

d)

Tripod

57.

When you first light a Bunsen burner, the flame should be:

a)

Yellow

b)

Blue

c)

Either

d)

Non existent. You shouldn't be using a bunsen burner to light things in the lab

58.

When you lift a bunsen burner, you hold it from the:

a)

Barrel

b)

Gas hose

c)

Base

d)

Collar

59.

First steps to using a Bunsen burner:

a)

Place on heat proof mat, connect gas hose to a gas tap and make sure the air hole is closed

b)

Place on heat proof mat, connect gas hose to a gas tap and make sure the air hole is open

c)

Place on heat proof mat, connect gas hose to a gas tap and light the bunsen burner

d)

Place on the bench, connect gas hose to a gas tap and make sure the air hole is open

60.

Choose the correct order of steps to light the Bunsen burner

a)

Clear the space around the Bunsen burner. Make sure a heat proof mat is available for putting the Burner on and putting out matches. Next open the air hole. Light up the match then open the gas tap. Keep a little distance while you do so.

b)

Clear the space around the Bunsen burner. Make sure a heat proof mat is available for putting the Burner on and putting out matches. Next close the air hole. Open the gas tap. Then light up the match. Keep a little distance while you do so. Then turn the collar to open the air hole.

c)

Clear the space around the Bunsen burner. Make sure a heat proof mat is available for putting the Burner on and putting out matches. Next close the air hole. Light up the match then open the gas tap. Keep a little distance while you do so. Then turn the collar to open the air hole.

61.

Name C

a)

Chimney

b)

Air Hole

c)

Collar

d)

Base

62.

Name F

a)

Collar

b)

Chimney

c)

Base

d)

Air Hole

63.

Water is the univeral ____.

a)

solute

b)

solvent

c)

solution

64.

solute + solvent =

a)

solution

b)

equation

65.
What is a solute?
a)
The substance that does the dissolving in a solution.
b)
The substance that is dissolved into the solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
66.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
67.

You make a pitcher of lemonade by adding lemon juice, sugar, ice and water. Which of the following are the 2 solutes in the solution?

a)

Lemon juice

b)

Sugar

c)

Water

d)

Lemon seeds

68.

When you open a bottle of sparking water, gas bubbles suddenly appear. These gas bubbles are dissolved in the water. Which is the solute in this solution?

a)

water

b)

gas bubbles

69.
a)

solvent

b)

solution

c)

solute

70.
a)

solvent

b)

solute

71.
a)

solvent

b)

solute

72.

Solutes dissolve quicker in _________ water.

a)

cold

b)

warm

73.

Solutes dissolve quicker if you stir them.

a)

true

b)

false

74.
a)

solvent

b)

solute

75.

If I dissolve carbon dioxide in water, what is the solvent?

a)

Carbon Dioxide

b)

There is no solvent

c)

Oxygen

d)

Water

76.
a)

solute

b)

solvent

77.

In a ______________, one substance is dissolved in another substance.

a)

solution

b)

suspension

c)

colloid

78.

Which one is not a colloid

a)

Foam

b)

Gel

c)

Emulsion

d)

Coffee

79.

Which of the following appear to be clear (are not cloudy)?

a)

Solution

b)

Suspension

c)

Colloid

80.

A combination of two or more substances that can be physically separated is called a...

a)

Mixture

b)

Pure substance

c)

Compound

81.
Sand floating in water, but most of the sand is settled at the bottom this an example of which type of mixture?
a)
A solution
b)
A colloid
c)
A suspension
d)
A compound
82.

Milk and gelatin are examples of __________________.

a)

suspensions

b)

colloids

c)

solutions

83.

Fruit Loops, pizza, and Skittles are examples of ____________________ mixtures.

a)

heterogeneous

b)

homogeneous

c)

pure

84.

Coffee, mouthwash, and vinegar are examples of __________________ mixtures.

a)

heterogeneous

b)

homogeneous

c)

pure

85.
Italian dressing is a
a)
solution
b)
suspension
c)
colloid
86.

Sugar water let's light pass through, and is a homogeneous mixture; it is a / an

a)

solution

b)

suspension

c)

colloid

87.

A snow globe is an example of a/an

a)

solution

b)

suspension

c)

colloid

d)

alloy

88.

In this mixture, which of the following will be the solute?

a)

The water in the glass

b)

The glass that holds the final mixture

c)

The solution containing both powder and water

d)

The powder on the spoon

89.

Tea and air are examples of ________________.

a)

solutions

b)

suspensions

c)

colloids

90.

Which one does NOT scatter light?

a)

solution

b)

colloid

c)

suspension

91.

A __________________ is a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity.

a)

mixture

b)

pure substance

c)

compound

d)

element

92.

A ______________ mixture is one that does not have a uniform composition.

a)

heterogeneous

b)

homogenous

c)

pure substance

93.

What is a mixture?

a)

elements chemically combined

b)

a combination of different substances

c)

composed of one atom only

d)

it is made of chemical

94.
What type of mixture is this?
a)
heterogeneous 
b)
homogeneous
95.
Sand floating in water, but most of the sand is settled at the bottom this an example of which type of mixture?
a)
A solution
b)
A colloid
c)
A suspension
d)
A compound
96.

Which statement below does NOT describe a colloid?

a)

A colloid is a type of heterogeneous mixture

b)

A colloid is a type of solution.

c)

The particles in a colloid do not settle like they do in a suspension.

d)

The particles in a colloid do not dissolve – they are just too small to be seen.

97.

How are suspensions and colloids different?

a)

Suspensions settle out and colloids do not settle.

b)

Colloids settle out and suspensions do not settle.

c)

Suspensions dissolve and colloids do not.

d)

Colloids dissolve and suspensions do not.

98.

It is a type of mixture that has the SAME COMPOSITION in every part.

a)

Homogenous

b)

Heterogeneous

99.

Salad is an example of a _____________.

a)

homogeneous mixture

b)

heterogeneous mixture

100.

Chocolate milk is an example of a _________________.

a)

homogeneous mixture

b)

heterogeneous mixture

101.

Colored water is an example of a ________.

a)

homogeneous mixture

b)

heterogeneous mixture

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