A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its atomic mass number is ____.
a. 26
b. 30
c. 52
d. 56
a. 26
100
Which particle of an element has a positive charge?
Protons
100
The metric unit for Force (what forces are measured in)
Newtons
100
What is the formula to measure Speed?
Speed= Distance/Time
100
Tell me which of Newton's Laws each statement is describing
A) An object in motion stays in motion
B) For every action there is an equal and opposite reaction
C) Force equals mass multiplied by acceleration (F=MA)
A) 1st
B) 3rd
C) 2nd
200
A fluorine atom is made of –
a. 9 protons, 10 neutrons, and 9 electrons
b. 9 protons, 9 neutrons, and 10 electrons
c. 9 protons, 10 neutrons and 28 electrons
d. 9 protons, 9 neutrons and 9 electron
d. 9 protons, 9 neutrons and 9 electrons
200
Which particle of an element has a negative charge?
Electron
200
A push or a pull
Force
200
What is the difference between Speed and Velocity?
Velocity is speed and direction
200
The variable that changes in an experiment
independent
300
Atoms of which of the following elements would be the MOST similar to oxygen (O) atoms?
a. Nitrogen
b. Sulfur
c. Chlorine
d. Flourine
b. Sulfur
300
Why do elements in Group 3 reacted similarly to each other?
Because they have the same number of valence electrons.
300
If there is 25 newtons of force going east on an object and 35 newtons pushing west, which way will the object move, and why? What is the net force?
West, net force 10 newtons west.
300
For the duration of a soccer game, Cris runs 30 m in 10 minutes. What is Cris's average speed?
3 m/s
300
Why should you always do multiple trials in a science experiment?
To reduce bias
Make the results more accurate
400
True or False: The elements in each group of the periodic table have the same number of valence electrons.
True
400
What is the law of conservation of mass?
Matter cannot be created or destroyed.
400
Two teams are playing tug-of-war and both teams go back and forth, no winner is declared. What kind of forces are applied?
balanced force (object that is not moving)
400
What are the 3 parts of an atom and what type of charge do they carry?
Neutron (0)
Proton (+)
Electron (-)
400
Write a possible measurement unit for the following:
Velocity
Acceleration
Force
Distance
Volume
m/s
cm/s/s
N
km
L
500
Each energy level of an atom has a maximum number of ______ it can hold.
a. neutrons
b. quarks
c. protons
d. electrons
d. electrons
500
What are examples of evidence that a chemical reaction has occurred?
(Multiple responses)
500
An object is pushed East with 15 Newtons
and pulled East with 13 Newtons
What is the net force acting on the object?
28 Newtons
500
What is a non-example of work?
(Answers vary)
500
How would you know a chemical reaction occurs?
Give an example of a chemical reaction
Give an example of a physical change
A new substance was created
Paper burning
Metal rusting
melting
crushing