STEM Review

The picture shows a series circuit with three lit bulbs. How many of the bulbs will remain lit if the wire is cut at the point shown by the arrow? (5.6B)

• 0

• 1

• 2

• 3

A group of students built the circuit shown here. The lightbulb does not glow. Which statement explains this observation? (5.6B)

• The battery is not charged.

• The lightbulb is not part of a complete circuit.

• The circuit does not have a switch.

• The bell uses most of the energy from the battery.

Tags

NGSS.4-PS3-2

When light travels through air into a prism, it bends and separates into many colors. In which other situation does light bend? (5.6C)

• When light moves through air into water

• When light hits a wall

• When light passes through outer space

• When light hits a mirror

Tags

NGSS.MS-PS4-2

The model above shows layers of sediment on an ocean floor. Which of the following can explain how these layers can become rock over many years?

• sand in the sediment melts and turns into rock

• weight of the water compacts the sediment into rock

• changing water temperatures turn sand in the sediment into rock

• pollution caused by humans turns sediment into rock

Which of the following best describes the role of decomposers in an ecosystem?

• They produce their own food through photosynthesis.

• They consume other organisms for energy.

• They break down dead organisms and waste, returning nutrients to the soil.

• They are the primary consumers of plants.

Tags

NGSS.MS-LS2-3

Which of the following best describes a producer in an ecosystem?

• An organism that eats other animals

• An organism that breaks down dead material

• An organism that makes its own food through photosynthesis

• An organism that only eats plants

Tags

NGSS.MS-LS2-3

What is the role of decomposers in an ecosystem?

• They produce oxygen through photosynthesis

• They eat living plants and animals

• They break down dead organisms and return nutrients to the soil

• They help pollinate plants

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

Why is biodiversity important in an ecosystem?

• It ensures that all organisms are the same size

• It increases the amount of pollution

• It helps the ecosystem be more resilient to changes

• It makes the ecosystem look more attractive

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Students make a model to show first step in formation of sedimentary rock. They pour 2 cm of light colored sand into a clear plastic box. They add 1 cm of gravel. Finally they pour 2 cm of dark colored sand on top of gravel. Which characteristic of sedimentary rock does this model show?

• Sedimentary rock is made of layers

• Sedimentary rock is made of cemented bits of rock

• Sedimentary rock is often limestone

• Sedimentary rock is often common in Texas.

Tags

NGSS.MS-ESS2-1

Which statement correctly describes the Sun's apparent movement across the sky?

• As Earth spins on its axis, it makes the Sun appear to move across the sky.

• As the Sun spins around Earth, it moves across the sky.

• Earth rotates around the Sun every 24 hours, making the Sun appear to move across the sky. 

• The Sun rotates around Earth every 12 hours, making the Sun appear to move across the sky. 

Tags

NGSS.MS-ESS1-1