Unit 3 Quiz

Which of these represents velocity?

• 33 m/s

• 33 miles

• 33 m/s east

• 33 m/s squared

What does newton's first law of motion state about the motion of an object when forces are balanced?

• The object will accelerate

• the object will remain at rest or move at a constant speed

• the object will stop moving

• the object will change direction

A train is driving at a constant speed on a straight road. Suddenly, the driver applies the brakes. What role do unbalanced forces play in this situation, and how do they affect the trains motion?

• the unbalanced forces cause the car to stop accelerating and keep moving at a constant speed

• the unbalanced forces make the car turn in the opposite direction

• the unbalanced forces cause the car to move faster

• unbalanced forces, like friction and braking, cause the car to decelerate and eventually stop

Tags

NGSS.MS-PS2-2

Find the average speed at 5 seconds

• 5 m/s

• 2.5 m/s

• 10 m/s

• 15 m/s

Tags

NGSS.MS-PS3-1

The diagram represents a chemical reaction. Reactant A and reactant B react to form product C. What type of substance is product C?

• an atom

• a mixture

• an element

• a compound

Tags

NGSS.MS-PS1-1

Which two elements are most likely to have similar physical properties?

• Gallium

• Zinc

• Indium

• Silver

The atomic mass of Chlorine is

• Cl

• 35.45

• 17

• 18.45

If you were to look at grains of table salt (sodium chloride, NaCl) with a magnifying glass, you would see that each grain is a little cube. Why are salt grains cubical?

• In the extended structure of NaCl, atoms are arranged in a cubical pattern.

• Sodium and chlorine atoms both have cubical shapes.

• One particle of NaCl contains eight atoms, each at one of the corners of a cube.

• All extended structure compounds form cubes.

Tags

NGSS.MS-PS1-1

What information does this model show?

• Shows the type of atoms/elements in the molecule.

• Shows the type of bonds between the atoms.

• Shows the relative size of the atoms.

• Shows the shape of the molecule.

Tags

NGSS.MS-PS1-1

What information does this model show?

• Shows the relative sizes of atoms.

• Shows the shape of the molecule.

• Shows the type of bonds between atoms.

• Shows the type of atoms in the molecule.

Tags

NGSS.MS-PS1-1