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Q2 Benchmark

Total questions: 102

Worksheet time: 3600secs

Name
Class
Date
1.

A student tests how different amounts of salt affect how quickly ice melts. What is the independent variable?

a)

Temperature of the room

b)

Amount of salt added

c)

Time it takes to melt

d)

Type of container

2.

Two groups test how effective a new plant fertilizer is. Group A uses 3 plants; Group B uses 30. Which group has more reliable results?

a)

Group A

b)

Group B

c)

Both equally

d)

Cannot tell

3.

A balloon is placed in a freezer and shrinks. What explains this change?

a)

Gas particles gain energy

b)

Gas particles slow and exert less pressure

c)

Gas particles increase in number

d)

Balloon material becomes heavier

4.

A metal spoon rests in hot soup. After 2 minutes the handle is hot. What happened?

a)

Convection

b)

Conduction

c)

Radiation

d)

Absorption

5.

A student mixes baking soda with vinegar and the cup becomes warm. What type of change is this?

a)

Physical

b)

Chemical

c)

Nuclear

d)

Periodic

6.

A student notices that a puddle disappears on a hot day. What is the BEST explanation?

a)

Water freezes

b)

Water boils suddenly

c)

Water evaporates due to heat

d)

The air absorbs water particles

7.

A red shirt looks black under blue light. Why?

a)

Red light is reflected

b)

Blue light is reflected

c)

The shirt absorbs blue light

d)

The shirt reflects all colors

8.

A science class tests how temperature affects dissolving rate. Which is the dependent variable?

a)

Amount of water

b)

Temperature of water

c)

Type of solute

d)

Rate at which it dissolves

9.

A student places a cold metal block on warm wood. After a few minutes, both are the same temperature. Why?

a)

Energy stops moving

b)

Heat moves from cold to hot

c)

Heat moves until equilibrium

d)

Wood cools the metal only

10.

A sample of sugar is heated until it turns brown and creates smoke. What does this indicate?

a)

A physical change

b)

A chemical change

c)

A phase change

d)

A mixture forming

11.

A student shines a laser from air into water. The beam bends toward the normal line. Why?

a)

Light speeds up

b)

Light slows down

c)

Light splits into colors

d)

Water absorbs light

12.

A student measures mass before and after boiling water. The mass is the same. Which law is demonstrated?

a)

Law of magnetism

b)

Law of reflection

c)

Law of conservation of energy

d)

Law of conservation of mass

13.

Students mix sand, iron filings, and salt. How can they separate the iron?

a)

Heating

b)

Filtering

c)

Using a magnet

d)

Adding water

14.

A roller coaster car stops at the highest point. Which energy is greatest?

a)

Chemical

b)

Kinetic

c)

Potential

d)

Light

15.

A tree study uses only 5 trees and results vary widely. How can the reliability improve?

a)

Use more trees

b)

Use fewer trees

c)

Use different fertilizer

d)

Change the hypothesis

16.

Students compare how sound travels through air, water, and metal. Where will it travel the fastest?

a)

Air

b)

Space

c)

Water

d)

Metal

17.

A student heats a white solid with liquid B. The mixture fizzes and gives off heat. What type of change is this?

a)

Physical

b)

Chemical

c)

Mixture

d)

Freezing

18.

A scientist dissolves sugar in water. What happened on the particle level?

a)

Sugar breaks into new substances

b)

Sugar reacts with water

c)

Sugar particles spread out

d)

Water changes chemically

19.

A block of ice melts on a table. Which microscopic change explains this?

a)

Particles freeze

b)

Particles lose energy

c)

Particles stop moving

d)

Particles gain energy and move apart

20.

Which is the smallest unit of matter that still has the properties of an element?

a)

Molecule

b)

Atom

c)

Compound

d)

Mixture

21.

Which is a pure substance?

a)

Saltwater

b)

Air

c)

Iron (Fe)

d)

Lemonade

22.

Water (H₂O) is classified as—

a)

An element

b)

A compound

c)

A mixture

d)

A solution

23.

Which example is a mixture?

a)

Oxygen gas

b)

Gold

c)

Table salt (NaCl)

d)

Sand and iron

24.

A sample contains only one type of atom. What is it?

a)

Mixture

b)

Element

c)

Compound

d)

Solution

25.

Which is a homogeneous mixture?

a)

Chocolate chip cookie

b)

Trail mix

c)

Saltwater

d)

Pizza

26.

Which describes a compound?

a)

Has only one type of atom

b)

Can be separated by physical means

c)

Formed when atoms chemically bond

d)

Always a solid

27.

Which is the BEST example of a heterogeneous mixture?

a)

Sugar water

b)

Air

c)

Oil and water

d)

Stainless steel

28.

What do all pure substances have in common?

a)

Made of many different particles

b)

Composition stays the same

c)

Always mixtures

d)

Can be separated physically

29.

The chemical formula CO₂ tells you that the substance—

a)

Is a mixture

b)

Has 1 carbon and 2 oxygen atoms

c)

Is an element

d)

Has no atoms

30.

Which is NOT a pure substance?

a)

Copper

b)

Water

c)

Air

d)

Salt (NaCl)

31.

Which statement describes a molecule?

a)

One atom

b)

Two or more atoms chemically joined

c)

A mixture of elements

d)

Always made of metals

32.

Which mixture can be separated using a magnet?

a)

Sand and water

b)

Sugar and water

c)

Iron and sand

d)

Saltwater

33.

Which is BOTH a pure substance AND a compound?

a)

Carbon

b)

Helium

c)

Water

d)

Air

34.

Which is a solution?

a)

Salad

b)

Soil

c)

Saltwater

d)

Oil and vinegar

35.

Which correctly describes an element?

a)

Cannot be broken down chemically

b)

Made from two substances

c)

Made of different atoms

d)

Always a gas

36.

Which sample is a mixture of compounds?

a)

Water

b)

Carbon dioxide

c)

Air

d)

Iron

37.

A student stirs sugar into tea until it disappears. On the particle level—

a)

Sugar breaks into new substances

b)

Sugar particles spread evenly

c)

Sugar atoms combine with tea

d)

Tea changes chemically

38.

Which is a chemical formula of a compound?

a)

O₂

b)

Ne

c)

H₂O

d)

Fe

39.

A substance is made from two elements bonded together. Which term describes it?

a)

Mixture

b)

Solution

c)

Compound

d)

Element

40.

A student wants to test the hypothesis of "If salt is added to water then the boiling point of water will decrease (go down)." What is the independent variable?

a)

Whether salt is added or not

b)

Boiling Point

c)

Amount of water

41.

Which is an example of a container filled with a pure substance?

a)

a glass of iced tea

b)

a bucket of salt water

c)

a tire filled with air

d)

a balloon filled with helium

42.

What type of substance is pictured?

a)

element

b)

compound

c)

mixture

d)

solution

43.

What type of substance is pictured?

a)

element

b)

compound

c)

mixture

d)

solution

44.

What type of substance is pictured?

a)

element

b)

compound

c)

mixture

45.

A substance that can NOT be broken down by physical or chemical means

a)

element

b)

compound

c)

mixture

46.

Matter is anything that has...

a)

weight and volume

b)

mass and density

c)

mass and weight

d)

mass and volume

47.

Matter that is composed of one type of atom is ...

a)

an element

b)

a compound

c)

a molecule

d)

a mixture

48.

A combination of substances that are not bonded together is...

a)

an element

b)

a compound

c)

a mixture

d)

jello

49.

Which is a mixture of compounds?

a)
b)
c)
d)
50.

Which is a pure substance?

a)
b)
c)
d)
51.

A substance that can be broken down by physical means is ...

a)

an element

b)

a compound

c)

a mixture

52.

a mixture that appears the same throughout is...

a)

homogeneous

b)

heterogeneous

53.

two or more atoms bonded together is...

a)

an element

b)

a big atom

c)

a molecule

d)

a mixture

54.

What determines the identity of an element?

a)

Number of protons

b)

Atomic mass

c)

Number of electrons

d)

Number of neutrons

55.

What is the charge of a neutron?

a)

Variable

b)

Negative

c)

Positive

d)

No charge

56.

What is the pH of a neutral solution?

a)

1

b)

0

c)

7

d)

14

57.

Which of the following is a homogeneous mixture?

a)

Sand and iron

b)

Vinegar

c)

Snack mix

d)

Salad

58.

What is the approximate mass of an electron?

a)

3 amu

b)

2 amu

c)

0 amu

d)

1 amu

59.

What is the formula for density?

a)

Density = Mass / Volume

b)

Density = Volume / Mass

c)

Density = Volume x Mass

d)

Density = Mass x Volume

60.

Which of the following is a pure substance?

a)

Gold (Au)

b)

Salad

c)

Vinegar

d)

Air

61.

What is the result of a neutralization reaction?

a)

Base

b)

Salt and water

c)

Hydrogen gas

d)

Acid

62.

Which of the following is a reversible change?

a)

Melting ice

b)

Rusting iron

c)

Burning wood

d)

Baking a cake

63.

What do you call the red particles in this mixture?

a)

Solvent

b)

Solute

c)

Solution

64.
Which letter shows an example of a homogeneous mixture?
a)
a
b)
b
c)
c
d)
d
65.
A vertical column is called...
a)
group
b)
tower
c)
period
d)
crew
66.

Which elements are colored red?

a)

nonmetals

b)

metals

c)

metalloids

67.

The arrow labeled #3 is pointing to:

a)

Element Symbol

b)

Atomic Mass

c)

Atomic Number

d)

Element Name

68.

Which of the following is a base?

a)

baking soda in water

b)

orange juice

c)

vinegar

d)

lemonade

69.

The pH scale...what numbers on the scale represent an acid?

a)

0-6

b)

7

c)

8-14

70.

Based on the pH scale representation, a pH of 3 demonstrates GREATER acidity than a pH of 5?

a)

True

b)

False

71.
How many protons does this atom have?
a)
2.5
b)
6
c)
5
d)
10.811
72.
What is the atomic number of this atom?
a)
4
b)
5
c)
9
d)
none of the above
73.
Identify the atomic mass
a)
79
b)
Au
c)
Gold
d)
196.967
74.
What does the nucleus of an atom contain?
a)
Electrons & Neutrons
b)
Protons & Neutrons
c)
Neutrinos & Positrons
75.

What is the atomic number of this atom?

(a)  

76.
What is the atomic number?
a)
12
b)
6
c)
C
d)
18
77.

Acid + Base → Salt + --------------------, the PH is about ---------------

a)

water, 7

b)

acid, 5

c)

base, 9

78.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
79.
What is Absorption?
a)
Light energy being emitted by stars
b)
Light energy being trapped in an object
c)
Light energy bouncing off an object
d)
Light energy bending
80.

Refraction is,

a)

When light bounces off an object

b)

When light is bent inside an object

c)

When light is blocked by an object

d)

When light is created from an object

81.
Scattering light is when, 
a)
When light travels in a strait line
b)
When light is stopped by an object
c)
When light is bounced in different directions
d)
When light is created
82.

A translucent object is

a)

An object that transmits light, but not a clear image

b)

An object that transmits light and detail

c)

An object that stops light

d)

An object that creates light

83.

A transparent object is,

a)

An object that transmits light

b)

An object that transmits light and detailed image

c)

An object that stops light

d)

An object that creates light

84.

A transparent object is,

a)

An object that transmits light

b)

An object that transmits light and detailed image

c)

An object that stops light

d)

An object that creates light

85.

Light always travels in.

a)

Curved lines

b)

Scattered lines

c)

Straight lines, until it encounters a medium

d)

It does not travel

86.
We see all objects around us, because.....
a)
Light is emitted from everything
b)
Light is refracted off of everything
c)
Light is reflected off of everything
d)
Light creates matter and our eyes see the creation of it.  
87.
Refracted light is light that _________ when it travels into a new __________.
a)
Bends, Medium
b)
Bounces, reflective surface
c)
Scatters, an object
d)
Stops, shadow
88.
The law of reflection is, the angle of incidence, is ________ to angle of reflection
a)
Twice
b)
Half
c)
Double
d)
Equal
89.
White light can be __________ into the seven colors.  
a)
Reflected
b)
Refracted
c)
Bounced
d)
Stopped
90.
We see color, when an object ____________ all other colors, and the color that we see is ______________
a)
Absorbed, Reflected
b)
Reflected, Refracted
c)
Stopped, Bent
d)
Absorbed, Emmited
91.
What color does a red shirt absorb?
a)
Red
b)
Green
c)
Blue
d)
Everything but red
92.
Plants absorb __________ and reflect __________.
a)
All colors, green
b)
Green, all colors
c)
Yellow and Blue, Green
d)
All colors, all colors
93.
A rough surface will __________ light.
a)
Reflect
b)
Refract
c)
Absorb
d)
Scatter
94.
A new medium will _______ light, which is __________.
a)
Scatter, Reflection
b)
Bounce, Reflection
c)
Absorb, Refraction
d)
Bend, Refraction
95.

Which of the following is a sign that a chemical reaction (or change) has occurred?

a)

change in shape

b)

melting

c)

formation of a gas

d)

dissolving

96.

Is melting butter for popcorn a chemical or physical change?

a)

chemical

b)

physical

97.

Which of the following is NOT an example of a physical change?

a)

crumpled paper

b)

dissolving sugar in water

c)

freezing water

d)

burning a marshmallow

98.
Kim puts an ice cube in a beaker and it melts. This is a good example of:
a)
a physical change.
b)
a chemical change.
c)
an experiment.
d)
an analysis.
99.
Put the liquids in order from most dense to least dense?
a)
4, 3, 2, 1
b)
1, 2, 3, 4
c)
3, 4, 2, 1, 
d)
4, 3, 1, 2
100.
Jack has a rock. The rock has a mass of 14g and a volume of 2cm3. What is the density of the rock?
a)
7 mL
b)
7 g/cm3
c)
28 g/cm3
d)
1/7 g/cm3
101.
A chemical change is different than a physical change because in a chemical change
a)
Chemicals are used
b)
Molecules do not physically touch
c)
A new substance is formed and in a physical change no new substance is formed
d)
The change can be seen but in a physical change it cannot
102.

What is happening to the molecules of water in the chemical change: electrolysis?

a)

Molecules get closer together and more packed

b)

Molecules break apart and form new molecules (H and O gas)

c)

The atoms in the molecules get bigger

d)

Nothing happens to the molecules

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