chem/phys quiz

How many atoms are in the following formula? NaCl

• 1

• 2

• 3

• 4

How many atoms of Oxygen are in the following formula? H₂NaHOOH

• 1

• 2

• 3

• 4

How many elements are in the following formula? H₂NaHOOH

• 3

• 2

• 4

• 6

Car A has a mass of 200 kg and a force of 100 N. Car B has a mass of 300 kg and a force of 100 N. Which is accelerating faster? (use equation on board)

• Car A

• Car B

• Both have the same acceleration

• It is not possible to determine.

Which of the following is not evidence that a chemical reaction occurred?

• Color change

• production of gas

• precipitate forming

• formation of a liquid

Milk and vinegar were combined in a flask. Soon after solid chunks began to form. What can we conclude about this change?

• It was a physical change

• a precipitate was formed

• milk and vinegar were the products

• we cannot conclude anything

Freezing a banana shows what evidence of a chemical reaction

• temperature change

• production of a solid precipitate

• this is only a physical change

• production of a gas

What is the net force of the object?

• 400 newtons up

• 400 newtons down

• net force is 0

• 800 newtons down

A 1 kg rock is thrown with the same force as a 2 kg rock. Which will accelerate faster?

• the 1 kg rock

• the 2 kg rock

• they will accelerate at the same rate

• there is not enough information to know

What can be said about the speed of the object diagrammed above?

• It is accelerating

• it is constant

• it is speeding up as time passes

• this is an acceleration graph and does not tell us about speed