STAAR Science

What energy transformations are occurring in this scenario?

• electrical energy --> mechanical energy --> light energy 

• solar energy --> electrical energy --> light energy
  

• solar energy --> mechanical energy --> light energy 

• solar energy --> electrical energy --> mechanical energy 

Which is newtons 3rd law

• for every thing there is reaction

• for every reaction there is a unusual action

• For every reaction there is an equal and opposite reaction

• for every reaction there is an good action

Tags

NGSS.MS-PS2-1

 What is the mass number of this element?

• 5

• 27

• 32

• 59

Tags

NGSS.MS-PS1-1

What is the mass of sodium (Na) atom that has 11 neutrons?

• 11

• 23

• 22

• 12

How many total atoms are in the compound C₂H₈O ?

• 11

• 2

• 8

• 1

Tags

NGSS.MS-PS1-1

How many elements are in C₆H₁₂O₆?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

How many Magnesium atoms are in 10MgCl₂?

• 10

• 5

• 20

Tags

NGSS.MS-PS1-1

Which of the following is an example of a chemical reaction?

• A marshmallow turning black when heated over a fire

• A powder dissolving in water to make lemonade

• An ice cube melting into a puddle of water

• Salt crystals being crushed into a powder
  

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In the case of a car crash, the body’s inertia will continue to carry it to the right. However, if the person is wearing a seatbelt, in which direction will this force act?

• to the right

• to the left

• upward

• downward

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Samuel kicks a soccer ball across a grassy field and it eventually comes to a stop. If Newton’s law of inertia is true, why did the ball stop? 

• Newton’s law only applies to objects at rest. 

• The mass of the ball is not great enough to have inertia. 

• Friction with the grass applies a net force on the ball causing it to decrease its speed. 

• Gravity slowed the ball until it came to a stop.