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Worksheets8th grade Science Fall Exam Review
Total questions: 46
Worksheet time: 19mins
Name
Class
Date
1.
An experiment involves many steps in order to reach a conclusion. Which of these steps is the LEAST important?
a)
using a control
b)
using a computer
c)
forming a hypothesis
d)
collecting reliable data
2.
Why should an experiment be repeated?
a)
to form a hypothesis
b)
to change the control
c)
identify the problem
d)
to reduce the chance of error
3.
Michael is creating a graph from a table consisting of types of animals and how far they jump. Which type of graph would be best to display information from this table?
a)
Line graph
b)
Bar graph
c)
Circle graph
d)
Scatter plot
4.
A student observed this tiger swallowtail butterfly on some damp mud. A hypothesis was made this type of butterfly drinks water found on the mud. What does the student need to do to see if the hypothesis is correct?
a)
put out a cup of water to see if the hypothesis is correct
b)
Make more & closer observations of this type of butterfly
c)
Read abaout the behavior of toher types of butterflies on the internet
d)
ask another student what they think
5.
Students built a model of the solar system scaled to size. All of these would be a limitation of the model EXCEPT…
a)
The speed the planets are rotating
b)
the distance between each planet
c)
the direction between each planet
d)
the temperature found on each planet
6.
When a goat eats grass, what form of energy passes directly from the grass to the goat?
a)
heat
b)
light
c)
electrical
d)
chemical
7.
After being introduced in the 1930s, the fire ant (Solenopsis invicta) became established throughout much of the southern United States. One biological way to control fire ants might be to introduce organisms …
a)
that are mutualistic with fire ants
b)
who produce food for fire ants
c)
who have commensalism relationship with fire ants
d)
that are parasitic to fire ants
8.
A hummingbird feeds on the nectar of a flowering plant. In this process, the bird gains nutrition while spreading the plant’s pollen to other flowers and helping in the reproduction process. The relationship between hummingbirds and flowering plants can be described as:
a)
commensalism
b)
predator/prey
c)
parasitism
d)
mutualism
9.
Tyler applies a small amount of liquid between his dog’s shoulder blades each month. The liquid helps prevent insects from bothering his dog. Lately, the liquid does not keep fleas off his dog. What is the likely cause of this change?
a)
fleas surviving exposure to the liquid have produced offspring that are resistant to the liquid
b)
the weather conditions have changed
c)
the population of fleas have increased in Tyler's yard
10.
A recent fossil discovery in Idaho included a jaw with a complete set of teeth. Every tooth in the jaw was extremely sharp and the bones indicate powerful jaw muscles were once attached to it. This extinct animal was most likely a:
a)
producer
b)
omnivore
c)
carnivore
d)
herbivore
11.
The Susquehanna River, which runs through the states of New York, Pennsylvania, and Maryland, received the designation “America’s Most Endangered River” in 2005. One of the river’s problems results from the large number of sewage (waste matter) pollution sites found along the course of the river. These sewage pollution sites are a direct result of an increase in…
a)
global warming
b)
human population
c)
recycling programs
d)
atmospheric changes
12.
Certain species of whiptail lizards have only female individuals and no males. These lizards reproduce asexually. What is one disadvantage of asexual reproduction for these lizards?
a)
a new population can be established by a single individual in a relatively short period of time
b)
all the members of a population are genetically very similar & less able to survive environmental changes
c)
they are smaller than lizards who reproduce sexually
d)
they are more likely to develop a variety of tail lengths
13.
. Which subatomic particle has a positive electric charge?
a)
neutron
b)
electron
c)
proton
d)
nucleus
14.
. Which subatomic particle is the smallest in size? ____
a)
neutron
b)
electron
c)
proton
d)
electron cloud
15.
When trying to identify an unknown element, a scientist determines what other elements the unknown element reacts with chemically. Which property of the unknown element determines the other elements it reacts with?
a)
the total number of neutrons in the unknown element
b)
the total number of particles in the nucleus of the unknown element
c)
the number of valence electrons
d)
the total number of protons in the nucleus of the unknown element
16.
The elements in Group 8A of the Periodic Table are shown to the right. How are these elements similar to one another?
a)
they are explosive
b)
they are radioactive
c)
they are unreactive
d)
they are liquid at room temperature
17.
Which of the following cannot be broken down into a simpler substance?
a)
iron oxide (FeO)
b)
aluminum (A)
c)
water (H2O)
d)
baking soda (NaHCO3)
18.
The reaction below shows rust (iron oxide) being produced from iron and oxygen. 2Fe + 3O yields Fe2O3 How many atoms make up one molecule of iron oxide?
a)
5
b)
7
c)
10
d)
12
19.
What does the number 4 in the compound 4NaCl2 represent?
a)
There are 4 molecules of NaCl2
b)
The reaction produces 3 atoms of chlorine
c)
The reaction produces 4 molecules of chlorine
d)
There are 4 atoms of chlorine
20.
What does the number 4 in the compound 4NaCl2 represent?
a)
There are 4 molecules of NaCl2
b)
The reaction produces 3 atoms of chlorine
c)
The reaction produces 4 molecules of chlorine
d)
There are 4 atoms of chlorine
21.
How many copper atoms are there in 2CuNO3 ?
a)
2
b)
1
c)
5
d)
6
22.
Each substance written to the right of the arrow in a chemical equation is a ____.
a)
product
b)
precipitate
c)
catalyst
d)
reactant
23.
Atoms in the same group on the periodic table often share similar properties because_______?A. they have the same number of electrons in their outer energy level B. they have the same number of energy levels C. they look alike D. they have the same number of protons
a)
same number of valence electrons
b)
same number of energy levels
c)
same number of protons
d)
they look alike
24.
CH4 is the best example of a ___?
a)
chemical equation
b)
atomic number
c)
chemical reaction
d)
chemical formula
25.
Students filled a tub with hot water. They took turns reading the temperature of the water once every five minutes for 60 minutes. The students want to learn about the rate at which water cools. Which would be the best way to display the data?
a)
scatter plot
b)
pie chart
c)
line graph
d)
bar graph
26.
The electrons in an atom that are involved in forming chemical bonds are called _________.
a)
electrons
b)
ions
c)
valence electrons
d)
precipitate
27.
Which variable is found on the X axis?
a)
dependent
b)
independent
c)
depends on the data
d)
time only
28.
Which one is NOT a correct lab safety technique?
a)
throw broken glass in the trash
b)
read all instructions before lab
c)
no food or drink allowed
d)
keep lab area clean
29.
How many protons, electrons & neutrons are found in Arsenic?
a)
33, 33,41
b)
42,33,33
c)
33,33,40
d)
33,33,42
30.
Which lab equipment is used to measure volume of an irregularly shaped object?
a)
test tube
b)
graduated cylinder
c)
beaker
d)
flask
31.
What is the acronym used to help with graphing is science?
a)
R.I.P.
b)
DRY MIX
c)
CHO & CHON
d)
IPMAT
32.
What is another name for Newton's 1st Law?
a)
Mass
b)
Inertia
c)
Action/Reaction
d)
Force/Mass
33.
F=m x a is the formula for Newton's ____ Law?
a)
1st
b)
2nd
c)
3rd
34.
A book staying at rest on the lab table is an example of Newton's ____ Law?
a)
1st
b)
2nd
c)
3rd
35.
What is the name of the elements found along the stairstep line on the periodic table?
a)
metalloids
b)
non metals
c)
metals
d)
noble gases
36.
Which type of elements are ductile & malleable?
a)
noble gases
b)
metals
c)
non metals
d)
metalloids
37.
Electrons are found in the ?
a)
electron cloud
b)
nucleus
c)
next to the protons
d)
attached to the neutrons
38.
The atomic mass of an element is the ______ & _____ added together.
a)
protons & electrons
b)
protons & neutrons
c)
all 3 subatomic particles
d)
only the electrons
39.
The table cloth trick (cup & tennis ball w/ sheet of paper) represented Newton's ___ Law.
a)
1
b)
2
c)
3
d)
none of them
40.
Which one of the answers is not a chemical change?
a)
color change
b)
gas being formed
c)
sound
d)
precipitate being formed
41.
The _________ variable is located on the Y axis and the ________ variable is found on the X axis.
a)
dependent, independent
b)
independent, dependent
c)
manipulated, results
d)
it doesn't matter on the location
42.
Which type of boundary typically forms a mid-ocean ridge?
a)
transform
b)
subduction zone
c)
divergent
d)
convergent
43.
What moon phase occurs at approximately Day 21?
a)
1st quarter
b)
full moon
c)
new moon
d)
3rd quarter
44.
The type of heat transfer which does not require a medium.
a)
conduction
b)
convection
c)
radiation
45.
A star moving away from Earth is said to have a ______ shift.
a)
red
b)
blue
c)
light year
d)
orbital
46.
Earth is found in the ________ Galaxy which is classified as____?
a)
Mounds, Spiral
b)
Nebula, Elliptical
c)
Milky Way, Irregular
d)
Milky Way, Spiral
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