Physical Science Final SG

Which substance is most likely classified as a colloid?

• soft drink

• oxygen

• water

• fog

Atoms of which two elements will form an ionic bond?

• Mg and Cl

• N and O

• Fe and Co

• Rb and Al

Which compound will most likely be formed when lithium and Nitrogen are chemically combined?

• LiN

• Li3N

• LiN3

• Li3N3

Student X pushes a 10-N box with a force of 2 N. At the same time, Student Y pushes the same box with a force of 6 N, but in the opposite direction. Which would most likely occur? (Ignore friction.)

• A The resultant force on the box would be 8 N.

• B The resultant force on the box would be 18 N.

• C The box will move toward Student X.

• D The box will move toward Student Y

Which equation represents a decomposition chemical reaction?

• A 2S + 3O2 → 2SO3

• B 2NaCl → 2Na + Cl2

• C 2K + 2H2O → 2KOH + H2

• D Zn + 2HCl → ZnCl2 + H2

When is work done on an object?

• A when a force is applied to an object and the object remains stationary

• B when a force is applied to an object and the object moves in the same direction as the force

• C when the frictional force on an object is greater than a force applied to the object

• D when two forces of equal magnitude are applied to the object in opposite directions

Which is the correctly balanced chemical equation for this reaction? HgO---> Hg + O2

• A HgO → Hg + 2O2

• B 2HgO → Hg + O2

• C 2HgO → Hg + 2O2

• D 2HgO → 2Hg + O2

A rock on Earth has a mass of 750 kg and a weight of 7,350 N. If the rock is taken into outer space, how will its mass and weight be affected?

• A The weight and mass will remain the same because they are not altered by the effects of gravity

• B The weight will remain the same, but the mass will change because of the effects of gravity

• C The mass will be 76.5 kg, and the weight will increase because of the effects of gravity

• D The mass will be 750 kg, but the weight will decrease because of the effects of gravity

As the wheels of a train move along the train tracks, what type of friction exists between the wheels and the tracks?

• fluid friction

• rolling friction

• sliding friction

• static friction

A 1,500-kg truck has a net force of 4,200 N acting on it. What is the truck’s acceleration?

• 6,000

• 2,700

• 2.8

• 0.36