Worksheets8th grade Science Second Semester Final
Total questions: 30
Worksheet time: 29mins
The Sun is the biggest star in the sky.
The milky way is an example of what type of galaxy?
spiral galaxy
elliptical galaxy
irregular galaxy
Define the term inertia.
the amount of matter in an object
the amount of space an object takes up
the tendency of an object to resist a change in motion, determined by mass
The force that one surface exerts on another when the two rub against each other
According to Newton’s third law of motion, the strength of a reaction force is ____________________ the strength of the action force.
equal to
negative to
positive to
greater than
The overall force on an object after all the forces are added together is called the
balanced force
unbalanced force
net force
centripetal force
How much force is needed to accelerate a 25kg bowling ball at 2m/s2.
50N
5N
12.5N
100N
Which of the following is an example of a chemical property?
The basketball is orange.
The gasoline is flammable.
The bike is made of metal.
The slice of cheese is a solid.
Which of the following could be the chemical formula for a compound?
Na
CO2
H2 + O2
Au
Silicon (Si) is in period 3 on the Periodic Table. What does this tell you about this element?
It is highly reactive with water.
It has 3 valence electrons.
It has 3 protons in its nucleus.
It has 3 energy levels/shells in its electron cloud.
The atomic number of an element is determined by which of the following?
Number of electrons
Number of neutrons
Number of protons
Number of protons and neutrons
What is the number of molecules in 7H2O2 ?
4
7
2
1
How many atom of Carbon are in C9H8O4
1
8
12
9
The pH of pure water is what?
7
8
2
14
Water is called the ________ because it dissolves so many substances.
polar molecule
universal solvent
specific heat
surface tension
A measure of how difficult it is to stretch or break the surface of a liquid is called...
specific heat
polar molecule
capillary action
surface tension
What two elements make up water
Hydrogen
Oxygen
Nitrogen
Oxygen
Carbon
Hydrogen
Carbon
Oxygen
Stronger acids have a pH closer to...
7
14
0
9
Anika, Samuel, and Grace were conducting a science experiment. They had lemon juice, hydrochloric acid, cabbage, and milk. According to the pH range, which substance did they find to be more acidic than lemon juice?
Hydrochloric acid
cabbage
milk
phosphoric acid
NaOH may be found in drain cleaners and as a component of soaps. Is NaOH an acid or a base?
Acid
Base
Neither (Neutral)
