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8th Grade Science Semester I Test

Total questions: 25

Worksheet time: 19mins

Name
Class
Date
1.
What subatomic particles would you find in the nucleus of an atom?
a)
Protons only
b)
Protons and Neutrons
c)
Neutrons and Electrons
d)
Protons and Electrons 
2.
What particle uniquely identifies an element?
a)
Number of Valence Electrons
b)
Number of Protons
c)
Number of Electrons
d)
Atomic Mass
3.
What subatomic particle is positively charged and is located inside of the nucleus?
a)
Proton
b)
Neutron
c)
Electron
d)
Ion
4.
a)
energy levels
b)
valence electrons
c)
protons
d)
neutrons
5.
a)
Group 1
b)
Group 17
c)
Group 2
d)
Group 18
6.
Sodium (Na) is found in group 
a)
1
b)
2
c)
3
d)
4
7.
Balance this equation:
 2Li + Cl2 -> LiCl
a)
2Li + Cl2 -> 4LiCl2
b)
2Li + Cl2 -> LiCl2
c)
2Li + Cl2 -> 2LiCl
8.
The substances listed on the left side of a chemical equation are the
a)
Products
b)
Coefficients
c)
Precipitates
d)
Reactants
9.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
10.
How many phosphorus atoms are in PO4?
a)
1
b)
2
c)
3
d)
4
11.
What is the net force?
a)
5000 N right
b)
4000 N right
c)
40 N left
d)
4000 N left
12.
If an object is stationary (not moving) the forces acting upon it are _____________
a)
unbalanced
b)
weak
c)
balanced
d)
Hulk Smash!
13.

If Harry drives 4 miles in 2 minutes, what was his speed?

a)

0.5 m/min

b)

2 m/min

c)

2 min/m

d)

0.5 min/m

14.

Which is newtons first law states

a)

An object at rest will remain at rest unless a force is applied

b)

An object is moving

c)

An object has stopped

d)

An moving object will keep going when a force is applied to it

15.

Which is newtons 3rd law

a)

for every thing there is reaction

b)

for every reaction there is a unusual action

c)

For every reaction there is an equal and opposite reaction

d)

for every reaction there is an good action

16.
What fuels a hurricane's strength?
a)
Wind
b)
Sunlight
c)
Warm Water
d)
Cold Water
17.

What type of breeze is this?

a)

Land Breeze

b)

Sea Breeze

c)

Mountain Breeze

d)

Valley Breeze

18.
The cycle that powers the ocean currents, weather, and tectonic plates it called
a)
conduction current
b)
radiation
c)
condition current
d)
convection current
19.
Energy for convection on the Earth comes from...
a)
The sun
b)
The moon
c)
Solar winds
d)
The ocean
20.
Which system results in drier, fairer weather?
a)
high pressure
b)
low pressure
c)
hurricane
d)
weather system
21.
The symbol on a weather map for a cold front is what?
a)
a line with triangles on it
b)
a line with semi-circles on it
c)
a line with squares on it
d)
a line with circles on it
22.

What city will experience decreasing temperatures in the next day?

a)

Denver

b)

El Paso

c)

Memphis

d)

Los Angeles

23.

What city is most likely going to see temperatures rise?

a)

San Jose

b)

El Paso

c)

Jacksonville

d)

Chicago

24.

Low Pressures are associated with what type of weather

a)

fair weather

b)

cold weather

c)

warm weather

d)

rainy weather

25.
Hot air rises because...
a)
it is less dense
b)
it is heavier
c)
it is more dense
d)
it contains Helium