Reactions
Which of the following is NOT a chemical reaction?
a Mixing baking soda and vinegar
c Cracking a glow stick
d Lighting a match
b Breaking a pencil in half
Which could be more dangerous?
a. acids
b. bases
c. neither
d. both can be dangerous
d. both can be dangerous
Which is the correct formula for calculating speed?
a Speed= Distance/Velocity
b Speed= Direction/Time
c Speed= Velocity/Direction
d speed= Distance/Time
D S = d/t
Which of the following is NOT a force being used by the girl to move her scooter?
a Applied
b Push
c Gravitational
d Frictional
b Push
A chemical reaction CAN be reversed.
false
What is solubility?
a.The part of a solution that dissolves.
b.How well a solute dissolves in a solution.
c.The part of the solution that the solute dissolves in.
b.How well a solute dissolves in a solution.
A cheetah can run 150 miles in 3 hours. How fast is the cheetah running?
50 miles per hour
What symbol do we use to show vectors?
arrow
What does a catalyst do in a chemical reaction?
speeds it up
What is a solute?
a.The part of a solution that dissolves
b.How well a solute dissolves in a solution.
c.The part of the solution that the solute dissolves in.
a.The part of a solution that dissolves
Which two things are needed for velocity?
a Speed and direction
b Time and direction
c Speed and time
d Direction and time
a Speed and direction
How is magnitude shown?
a. head
b. tail
b. tail
Which of the following is a reactant of the chemical equation below?
Na + Cl --> NaCl
Na
Cl
What is the solvent?
a.The part of a solution that dissolves.
b.How well a solute dissolves in a solution.
c.The part of the solution that the solute dissolves in.
c.The part of the solution that the solute dissolves in.
Which of the following tells us a velocity?
a The boy was running 5mph.
b The storm was moving 25mph west.
c The train was traveling south.
b The storm was moving 25mph west.
How is direction shown?
a. head
b. tail
a. head
Does an inhibitor increase or decrease the rate in a chemical reaction?
decrease
Which of the following is a characteristic of acids?
a Could have a pH of 12
b Forms hydroxide ions
c Could have a pH of 2
d Tastes bitter
c. could have a pH of 2
What is a reference point?
determine if something is in motion
If someone is pushing a box with a force of 20 Newtons to the right and another person is pushing that box with a force of 20 Newtons to the left, is that a balanced or unbalanced force?
balanced