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WorksheetsSemester 1 8th Grade Science
Total questions: 52
Worksheet time: 30mins
Name
Class
Date
1.
What do elements in the same group on the periodic table have in common?
a)
Similar Chemical Symbols
b)
The same atomic number
c)
Similar Chemical Properties
d)
The same average atomic mass
2.
Which group lists the parts of an atom from the most massive to the least massive?
a)
Proton, Nucleus, Electron
b)
Nucleus, Electron, Proton
c)
Electron, Nucleus, Proton
d)
Nucleus, Proton, Electron
3.
If Calcium is in period 4, group 2 with an atomic number of 20. How many valence electrons are in the outer most ring of its electron orbit?
a)
4
b)
2
c)
20
d)
6
4.
The first person to say that atoms exist was?
a)
John Dalton
b)
JJ. Thompson
c)
Democratus
d)
Earnest Rutherford
5.
Elements that are shiny and conduct heat and electricity well are called what?
a)
Metals
b)
NonMetals
c)
Metalloids
d)
All Elements
6.
What subatomic particles are found in side the nucleus?
a)
Neutrons
b)
Electrons
c)
Neutrons and Protons
d)
Neutrons, Protons, and Electrons
7.
What is an entire atom considered?
a)
Negative
b)
Neutral
c)
Positive
d)
Neutral, Positive and Negative
8.
A gas becomes a liquid
a)
melting
b)
sublimation
c)
Evaporation
d)
Condensation
9.
Stars are considered which of matter?
a)
Solid
b)
Liquid
c)
Gas
d)
Plasma
10.
A solid becomes a gas
a)
melting
b)
sublimation
c)
Evaporation
d)
Condensation
11.
What term describes the state of matter in which the attractive forces between particles are the greatest?
a)
Liquid
b)
Solid
c)
Gas
d)
Metal
12.
Which statement is true of the carbon atoms that make up a diamond?
a)
They can slip past one another slowely
b)
They are always vibrating in place
c)
They vibrate only when they are heated
d)
They are locked into place and do not move at all
13.
All matter is made of tiny particles that are in constant motion
a)
Matter
b)
Plasma
c)
The Law of Conservation of Mass
d)
The Kinetic theory of matter
14.
A Liquid becomes a solid
a)
Melting
b)
Evaportation
c)
Freezing
d)
Solid
15.
The ability of an object to be able to catch on fire
a)
Reactivity
b)
Luster
c)
Thermal Conductivity
d)
Flammability
16.
The ability of a substance to be rolled or pounded into various shapes
a)
Melting
b)
Matter
c)
Malleability
d)
Movement
17.
How do you calculate volume?
a)
Mass/Volume
b)
Water Displacement
c)
Length x width x height
d)
Triple Beam balance
18.
Mass is measured in what units?
a)
Newtons
b)
Inches
c)
Cm
d)
Grams
19.
Which process is an example of a physical change?
a)
Ice Melting
b)
Milk Souring
c)
Metal Rusting
d)
Wood Burning
20.
Which types of changes observe the law of conservation of mass?
a)
Only changes of state
b)
Chemical changes only
c)
Physical Changes only
d)
Both physical and chemical changes
21.
Which of these activities is a chemical change that requires an increase in temperature?
a)
Boiling Water
b)
Melting Butter
c)
Cutting a sandwich
d)
Baking Cookies
22.
Burning wood into ash is an example of what kind of change?
a)
Physical
b)
Chemical
c)
Absorption
d)
Displacement
23.
Ms. Kidwell dissolves 10 g of salt into a beaker of 100 g of water. What is the resulting mass?
a)
100 g
b)
101 g
c)
110 g
d)
120 g
24.
A solution that has an excess of Hydrogen ions (H+)
a)
Acid
b)
Base
c)
Neutral
d)
pH
25.
A measure of how acidic or basic a solution is.
a)
Acid
b)
Base
c)
Neutral
d)
pH
26.
Which of these substances is an example of a solution?
a)
Milk
b)
Brass
c)
Mercury
d)
Concrete
27.
What is an example of an acidic substance?
a)
Dish Soap
b)
Bleach
c)
Vinegar
d)
Pure Water
28.
What is always produced during a neutralization reaction?
a)
Just a base
b)
Just an acid
c)
Just salt
d)
Pure water and salt
29.
An example of a suspension mixture?
a)
Milk
b)
Italian Dressing
c)
Oxygen
d)
Air
30.
The pH scale goes from?
a)
1 to 13
b)
0 to 14
c)
1 to 14
d)
0-7
31.
The process that uses energy from the sun to make food?
a)
Cellular Respiration
b)
Anaerobic Respiration
c)
Photosynthesis
d)
Photoplanting
32.
The organelle in which Cellular Respiration occurs?
a)
Mitochondria
b)
Nucleus
c)
Chloroplast
d)
Vacuole
33.
This pigment captures energy from the sun?
a)
Chloroplast
b)
Mitochondria
c)
Chlorophi
d)
Chlorophyll
34.
What is the food that plants produce during photosynthesis?
a)
Carbon Dioxide
b)
Chlorophyll
c)
Chloroplast
d)
Glucose
35.
Why do all organisms need food?
a)
To provide organisms with water
b)
To provide energy needed by cells
c)
To provide oxygen needed for respiration
d)
Provide organisms with DNA to grow
36.
What is the original energy source?
a)
Soil
b)
Water
c)
Food
d)
Sunlight
37.
How many protons does Argon have if it has an atomic number of 18 and an atomic mass of 39.948?
a)
40
b)
18
c)
39.948
d)
58
38.
Which state of matter will take both the volume and shape of the container that holds it?
a)
Gas
b)
Ice
c)
Liquid
d)
Solid
39.
In which state of matter are the particles able to move around one another?
a)
Gases only
b)
Liquids only
c)
Gases and Liquids only
d)
Gases, Liquids and Solids
40.
A characteristic of a substance that can be observed and measured without changing the identity of the substance
a)
Physical Properties
b)
Chemical Properties
c)
Physical Changes
d)
Chemical Changes
41.
A combination of two or more substances that form a new substance with new properties
a)
Chemical Properties
b)
Chemical Changes
c)
Physical Changes
d)
Physical Properties
42.
Mr. Hodges and his brother go camping. Mr. Hodges cuts wood for the fire. His brother cooks a hotdog while coffee brews over the campfire. Steam escapes from the coffee pot. What type or types of changes are present in this illustration?
a)
Physical Changes only
b)
Chemical changes only
c)
Both physical and chemical changes
d)
Neither physical nor chemical change
43.
Do changes that cannot be easily reversed such as burning, observe the law of conservation of mass?
a)
Yes, because matter was not destroyed just changed forms
b)
Yes, because matter was just created
c)
No, because it is no longer the original form
d)
No, because burning is a chemical change
44.
Matter that has a fixed composition, unique properties and contains only 1 type element or compound
a)
Mixture
b)
Pure substance
c)
Acid
d)
Homogeneous
45.
How could you break down the compound Calcium Carbonate into the elements that make it up?
a)
melting
b)
crushing
c)
a filter
d)
a chemical change
46.
A type of energy created in cellular respiration from adenosine and 3 Phosphate molecules?
a)
Chemical Energy
b)
ATP
c)
Light Energy
d)
Sunlight
47.
Plants make their own food during photosynthesis. In what group do plants belong?
a)
Producers
b)
Consumers
c)
Chloroplast
d)
Decomposer
48.
Some organisms feed on dead and decaying bodies. In what group do these organisms belong?
a)
Producers
b)
Consumers
c)
Chloroplast
d)
Decomposer
49.
Animals eat other animals and plants for food. In what group do these animals belong?
a)
Producers
b)
Consumers
c)
Chloroplast
d)
Decomposer
50.
Marcus wants to use two objects to compare the sizes of a proton and an electron. If he uses a basketball for a proton, which object would best represent an electron?
a)
A Pea
b)
A Bowling Ball
c)
A Beach Ball
d)
A Soccer Ball
51.
Anearobic means what?
a)
With air
b)
without air
52.
Aerobic means what?
a)
With air
b)
without air
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