8.7 Understanding Forces and Motion

What is the chemical symbol for the element Oxygen?

• O

• Ox

• Oy

• Om

Tags

TEKS.SCI.7.6A

Which of the following is a compound?

Tags

TEKS.SCI.7.6A

Calculate the net force on an object if a force of 10 N is applied to the right and a force of 4 N is applied to the left.

• 6 N to the right

• 14 N to the right

• 6 N to the left

• 14 N to the left

Tags

TEKS.SCI.6.7B

Which of the following is an example of a physical change?

• Burning wood

• Rusting iron

• Melting ice

• Baking a cake

Tags

TEKS.SCI.7.6C

How does Newton's First Law of Motion apply to a car crash?

• It explains why the car accelerates.

• It describes the force needed to stop the car.

• It states that the car will remain in motion unless acted upon by an external force.

• It calculates the speed of the car.

Tags

TEKS.SCI.8.7B

• Water has more atoms.

• Carbon dioxide has more atoms.

• Both have the same number of atoms.

• Cannot be determined.

Tags

TEKS.SCI.7.6A

• 10 N

• 7 N

• 15 N

• 5 N

Tags

TEKS.SCI.8.7A

Which of the following scenarios best illustrates Newton's Third Law of Motion?

• A book resting on a table

• A rocket launching into space

• A car accelerating on a highway

• A ball rolling down a hill

Tags

TEKS.SCI.8.7B

Determine if the forces are balanced or unbalanced: A box is pushed with 20 N to the right and 20 N to the left.

• Balanced

• Unbalanced

• Cannot be determined

• None of the above

Tags

TEKS.SCI.6.7B

Which of the following is a chemical change?

• Dissolving sugar in water

• Freezing water

• Burning paper

• Cutting a piece of wood

Tags

TEKS.SCI.7.6C