stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Duplicate of 8th Grade Chemistry and Physics Flashcards | StudBud
Explore
/
Duplicate of 8th Grade Chemistry and Physics
Duplicate of 8th Grade Chemistry and Physics
36 terms
·
StudBud Administration
·
27 plays
Review of 8th grade Chemistry and Physics concepts
Flashcards
36 cards
F
Practice quiz
P
Host live
L
Questions
36
Answers
1
Which part of the chemical equation represents the chemical reaction?
chemical symbols
yield sign
addition sign
chemical formula
2
How many elements are below?
3
12
6
24
3
This type of element is located on the left of the stair step:
non-metals
gases
metals
metalloids
4
Atoms of different elements ALWAYS have different number of protons.
False
True
5
What does this graphic represent?
Compound
Element
Solid
Mixture of Atoms
6
What does this graphic represent?
Compounds
Mixture of Atoms
Mixture of Elements
Solution
7
What does this graphic represent?
Atoms
Mixture of Molecules
Compound Molecules
8
When does an object have greatest kinetic energy and least potential energy
highest point
lowest point
9
If an atom has 4 protons and 4 electrons what is the charge of the atom?
negative
neutral
positive
10
Elements with similar reactivity and chemical properties are located in the same _____________.
section
period
row
group
11
Is the following chemical equation balanced or unbalanced?
balanced
unbalanced
12
Elements on the Periodic Table are arranged in the order of increasing ___________________.
neutrons
mass of nuclues
electrons
Atomic #
13
What does the graphic represent?
Element
Oxygen
Compound
Mixture
14
The atomic mass contains which subatomic particles?
neutrons
electrons
protons
both neutrons and protons
15
A car travels an average speed of 70 km/hr. How far does it travel in 3 hours?
21 km
210 hours
21 hours
210 km
16
A gardener applies a force of 50 N and moves a rock 1.5 meters. How much work does he do?
75 joules
80 joules
25 joules
50 joules
17
How many atoms are below?
8
4
10
2
18
How many molecules are below?
2
3
9
6
19
What is the speed of a train that traveled 244 km in 2 hours?
122 km/hr
24 km/hr
244 km/hr
488 km/hr
20
All the mass of an atom can be found in the _____________.
electrons
nucleus
protons
orbitals
21
Electrons on the outermost shell are called:
outer electrons
elements
electron cloud
valence electrons
22
Is this chemical equation balanced or unbalanced ?
balanced
unbalanced
23
Some toys are battery operated, which of the following transformations take place in a toy?
chemical to electrical to heat energy
heat to chemical to electrical energy
mechanical to heat to light energy
electrical to mechanical to heat energy
24
The best definition of Newton's first law is...
an object's motion is dependent on unbalanced forces
an object's motion depends on it's mass
an object's motion depends on its acceleration
an object will remain in motion even if there is friction
25
Which of the following is the best example of Newton's First Law?
a rocket sitting on the ground preparing for takeoff
a rocket accelerating through space
a rocket taking off from earth
26
Which best summarizes the difference between speed and velocity?
speed is how fast it is moving, velocity is not speed
speed is how fast it moves, velocity is speed & direction
speed is how fast it is moving, velocity is mass and speed
speed the direction, velocity is how fast it is moving
27
What is the atomic number of this model?
6
2
4
28
The elements or substances before a chemical reaction occur are called _______________.
products
reactions
reactants
coefficients
29
What is the atomic mass of this model?
6
4
2
30
Which is the best example of Newton's Third Law?
a rocket taking off from earth
a rocket that is accelerating through space
a rocket sitting on the ground preparing for takeoff
31
Which is an example of Newton's Second Law?
a rocket that is accelerating through space due to it's mass
a rocket taking off from earth
a rocket sitting on the ground preparing for takeoff
32
Under which of the following conditions would the change in an objects speed be greatest?
small net force applied to a heavy object
a large net force applied to a light object
large net force applied to a heavy object
a small net force applied to a light object
33
In neutral atoms, the # of protons = the # of ______________.
neutrons
electrons
elements
atoms
34
Elements in the same ____________ have the same number of energy levels/orbitals.
group
section
period
column
35
How long would it take to travel 440 km at 44 km/hr
10 hours
44 hours
10 km/hr
100 hours
36
Atoms are mostly empty space.
False
True
