STAAR

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

How many neutrons does the an element with an atomic number of 3 and a mass of 6.9 contain?

Tags

NGSS.MS-PS1-1

The diagram shows a 50 N load being lifted with a movable pulley. To raise the load one meter, how much upward force must be exerted on the rope?

• 10 N

• 25 N

• 15 N

• 50 N

Tags

NGSS.MS-PS2-2

When an egg is boiled in a pot of water on the stove, there is more than one kind of heat transfer. Heat is transferred from the stove to the pot directly since they are physically touching. Heat is also transferred from the pot to the egg, carried through the water. What two kinds of heat transfer are represented?

• Stove to Pot = Radiation, Pot to Egg = Conduction

• Stove to Pot = Convection, Pot to Egg = Conduction

• Stove to Pot = Conduction, Pot to Egg = Radiation

• Stove to Pot = Conduction, Pot to Egg = Convection

Tags

NGSS.MS-PS3-4

The diagram shows a circuit with the bulb glowing. How does the energy change as it moves from inside the battery, along the wires, and through the light bulb?

• Electrical to Light to Chemical

• Chemical to Electrical to Light

• Light to Electrical to Chemical

• Chemical to Light to Electrical

Tags

NGSS.MS-PS3-4

Which layer of Earth is broken up into giant moving plates?

• Asthenosphere

• Lithosphere

• Inner core

• Outer core

A truck is parked at the bottom of a hill. It moves from the bottom of a hill and parks at the top. Compared to when it was parked at the bottom of the hill at its new position, the truck now has?

• More potential energy

• Less potential energy

• More kinetic energy

• Less kinetic energy

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

An image of a toy rocket and forces are shown below. Assuming the only two forces on the toy rocket are lift and gravity, which of the following combinations would result in the rocket moving upward?

• Lift = 5 Newtons and Gravity = 5 Newtons

• Lift = 5 Newtons and Gravity = 4 Newtons

• Lift = 3 Newtons and Gravity = 4 Newtons

• Lift = 4 Newtons and Gravity = 4 Newtons

Tags

NGSS.MS-PS2-2

The diagram shows an investigation in a science classroom. Students pulled the same mass up an inclined plane propped up on five blocks, then six, seven, and eight blocks. Each time, they use a spring scale to measure the forces needed to pull the mass up the inclined plane. This investigation can show how which of the following affects the force needed to move an object up an inclined plane?

• The mass of the object

• The length of the inclined plane

• The height of the inclined plane

• The surface area of the object

Tags

NGSS.MS-PS2-2