S8s1

Keesha did an experiment to study the rate of photosynthesis in the water plant Elodea. She placed a piece of Elodea in a beaker of water and set the beaker 10 centimeters (cm) from a light source. Keesha counted the bubbles released from the plant every minute for five minutes (min). She repeated the process two more times. First, she moved the light to 20 cm from the beaker, and then she moved the light to 30 cm from the beaker. Keesha’s setup and data are shown below.What is the outcome variable (dependent variable) in this experiment?

• the number of bubbles produced

• the type of plant placed in the beaker

• the distance of the light source from the plant

• the amount of time the bubbles were counted

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-1

NGSS.MS-LS2-3

A student wants to find out if temperature affects the behavior of goldfish. He has four fish bowls and 20 goldfish. Which of the following experiments should he do?

• A

• B

• C

• D

Tags

NGSS.MS-LS1-4

NGSS.MS-LS2-4

A farmer wants to find out which type of soil is best for growing his corn. He also wants to find out which type of fertilizer is best for growing his corn.  He does the following experiment using two different types of soil and two different types of fertilizer. What can the farmer conclude from this experiment?

• He can conclude that Soil B is the best soil for growing his corn

• He can conclude that Fertilizer Y is the best fertilizer for growing his corn

• A.  He can conclude that Soil B is the best soil for growing his corn and that Fertilizer Y is the best fertilizer for growing his corn.

• It is NOT possible to conclude from this experiment which soil is best for growing his corn or which fertilizer is best for growing his corn

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A student wants to know if the weight of a cart affects its speed at the bottom of a ramp. He can change the weight of the cart by adding different numbers of balls, and he can change the height of the ramp by using different numbers of blocks. Which set of tests should he compare (set A, B, C, or D)?

• A

• B

• C

• D

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

• Same group
• Same period

The number at the top of each square on the periodic table is the ...

• atomic number

• atomic mass

• Chemical Symbol

• Element Name

Tags

NGSS.MS-PS1-1

When nitrogen is returned to the soil when dead plants decompose, the interaction is between which two spheres?

•  Hydrosphere and geosphere

•  Cryosphere and geosphere

•  Biosphere and Geosphere

•  Biosphere and atmosphere

Tags

NGSS.MS-LS2-3

Which of the following statements refers to weather?

• “It rains a lot in the Spring in my city.”

• “It’s very hot and sunny today. Let’s go to the beach.”

• “There are many people who don’t believe there is a hole in the ozone layer’”

• “We are going south to Florida in January because it will be warmer.” 

Tags

NGSS.MS-ESS2-5

Which of the following would be a cause of chemical weathering?

•  Acid rain

• Freezing and thawing

• Abrasion

• Animal action

Tags

NGSS.MS-ESS2-2

The “Ring of Fire” is an area along the edge of the Pacific Ocean with many volcanoes. Most of the volcanoes are formed as a result of one tectonic plate. Which of these geological areas is where rock is recycled by one tectonic plate sliding underneath another tectonic plate?

• Rift valley

• Strike-slip fault

• Subduction zone

• Divergent boundary

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-3