CAST REVIEW

What is the correct formula for speed?

• Speed = Distance x Time

• Speed = Distance/ Time

• Speed = Time/ Distance

Tags

NGSS.MS-PS3-1

At 8 am, Lillian leaves her house and walks to school, heading West. She arrives at 8:30 am. The school is 900 meters away from her house. Find her velocity.

• 30 meters/min West

• 900 meters/min West

• 30 meters/min

• 900 meters/min

What is the difference between speed and velocity?

• Speed includes direction and velocity does not include direction.

• Velocity includes direction and speed does not include direction.

• Speed has a measurable quantity and velocity cannot be measured

• Speed and velocity have no differences.

The distance versus time graph below shows the movement of an object over a period of time. What is the average speed of the object?

• 0.5m/min

• 2 m/min

• 25 m/min

• 50 m/min

Tags

NGSS.MS-PS3-1

A spring scale is pulled downward and readings are recorded. If the string is pulled 6.0 cm, the spring scale should read

• 15 N

• 16 N

• 17 N

• 18 N

Which object below will have the greatest amount of force?

• Object R

• Object S

• Object T

• Object U

Which of the following correctly describes the structure of the compound, sodium chloride (NaCl)?

• covalent compound with elements that share electrons.

• covalent compound with crystal structure of repeating positive and negative ions.

• ionic compound with elements that share electrons.

• ionic compound with crystal structure of repeating positive and negative ions.

Fluorine is an element with an atomic number of 9. What are two differences between the isotopes Fluorine18 and Fluorine-19?

• They both have different number of protons and different number of neutrons. B. They both have different D. They both have different number of neutrons and different number of electrons.

• They both have different number of neutrons and different mass number.

• They both have different number of electrons and different mass number.

• They both have different number of neutrons and different number of electrons.

Tags

NGSS.MS-PS1-1

The __________is a positively charged subatomic particle that is located in the nucleus of an atom.

• neutron

• proton

• electron

Tags

NGSS.MS-PS1-1

When a solid changes into a liquid, the atoms in a liquid will ____________the atoms in a solid.

• move the same amount as

• move more than

• ve less than

• move at a slower rate

Tags

NGSS.MS-PS1-4